16acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/*M/////////////////////////////////////////////////////////////////////////////////////// 26acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 36acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. 46acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 56acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// By downloading, copying, installing or using the software you agree to this license. 66acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// If you do not agree to this license, do not download, install, 76acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// copy or use the software. 86acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 96acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Intel License Agreement 116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// For Open Source Computer Vision Library 126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Copyright (C) 2000, Intel Corporation, all rights reserved. 146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Third party copyrights are property of their respective owners. 156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Redistribution and use in source and binary forms, with or without modification, 176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// are permitted provided that the following conditions are met: 186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// * Redistribution's of source code must retain the above copyright notice, 206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// this list of conditions and the following disclaimer. 216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// * Redistribution's in binary form must reproduce the above copyright notice, 236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// this list of conditions and the following disclaimer in the documentation 246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// and/or other materials provided with the distribution. 256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// * The name of Intel Corporation may not be used to endorse or promote products 276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// derived from this software without specific prior written permission. 286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// This software is provided by the copyright holders and contributors "as is" and 306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// any express or implied warranties, including, but not limited to, the implied 316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// warranties of merchantability and fitness for a particular purpose are disclaimed. 326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// In no event shall the Intel Corporation or contributors be liable for any direct, 336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// indirect, incidental, special, exemplary, or consequential damages 346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// (including, but not limited to, procurement of substitute goods or services; 356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// loss of use, data, or profits; or business interruption) however caused 366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// and on any theory of liability, whether in contract, strict liability, 376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// or tort (including negligence or otherwise) arising in any way out of 386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// the use of this software, even if advised of the possibility of such damage. 396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn//M*/ 416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include "_cv.h" 426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* initializes 8-element array for fast access to 3x3 neighborhood of a pixel */ 446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define CV_INIT_3X3_DELTAS( deltas, step, nch ) \ 456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ((deltas)[0] = (nch), (deltas)[1] = -(step) + (nch), \ 466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (deltas)[2] = -(step), (deltas)[3] = -(step) - (nch), \ 476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (deltas)[4] = -(nch), (deltas)[5] = (step) - (nch), \ 486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (deltas)[6] = (step), (deltas)[7] = (step) + (nch)) 496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic const CvPoint icvCodeDeltas[8] = 516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { {1, 0}, {1, -1}, {0, -1}, {-1, -1}, {-1, 0}, {-1, 1}, {0, 1}, {1, 1} }; 526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennCV_IMPL void 546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RenncvStartReadChainPoints( CvChain * chain, CvChainPtReader * reader ) 556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int i; 576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_FUNCNAME( "cvStartReadChainPoints" ); 596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __BEGIN__; 616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !chain || !reader ) 636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsNullPtr, "" ); 646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( chain->elem_size != 1 || chain->header_size < (int)sizeof(CvChain)) 666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR_FROM_STATUS( CV_BADSIZE_ERR ); 676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvStartReadSeq( (CvSeq *) chain, (CvSeqReader *) reader, 0 ); 696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_CHECK(); 706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn reader->pt = chain->origin; 726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < 8; i++ ) 746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn reader->deltas[i][0] = (schar) icvCodeDeltas[i].x; 766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn reader->deltas[i][1] = (schar) icvCodeDeltas[i].y; 776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __END__; 806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* retrieves next point of the chain curve and updates reader */ 846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennCV_IMPL CvPoint 856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RenncvReadChainPoint( CvChainPtReader * reader ) 866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn schar *ptr; 886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int code; 896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvPoint pt = { 0, 0 }; 906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_FUNCNAME( "cvReadChainPoint" ); 926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __BEGIN__; 946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !reader ) 966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsNullPtr, "" ); 976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn pt = reader->pt; 996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ptr = reader->ptr; 1016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( ptr ) 1026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 1036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn code = *ptr++; 1046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( ptr >= reader->block_max ) 1066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 1076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvChangeSeqBlock( (CvSeqReader *) reader, 1 ); 1086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ptr = reader->ptr; 1096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 1106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn reader->ptr = ptr; 1126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn reader->code = (schar)code; 1136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( (code & ~7) == 0 ); 1146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn reader->pt.x = pt.x + icvCodeDeltas[code].x; 1156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn reader->pt.y = pt.y + icvCodeDeltas[code].y; 1166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 1176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __END__; 1196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return pt; 1216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/****************************************************************************************\ 1256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn* Raster->Chain Tree (Suzuki algorithms) * 1266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn\****************************************************************************************/ 1276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renntypedef struct _CvContourInfo 1296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int flags; 1316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct _CvContourInfo *next; /* next contour with the same mark value */ 1326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct _CvContourInfo *parent; /* information about parent contour */ 1336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq *contour; /* corresponding contour (may be 0, if rejected) */ 1346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvRect rect; /* bounding rectangle */ 1356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvPoint origin; /* origin point (where the contour was traced from) */ 1366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int is_hole; /* hole flag */ 1376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn_CvContourInfo; 1396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* 1426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Structure that is used for sequental retrieving contours from the image. 1436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn It supports both hierarchical and plane variants of Suzuki algorithm. 1446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn*/ 1456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renntypedef struct _CvContourScanner 1466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStorage *storage1; /* contains fetched contours */ 1486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStorage *storage2; /* contains approximated contours 1496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (!=storage1 if approx_method2 != approx_method1) */ 1506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStorage *cinfo_storage; /* contains _CvContourInfo nodes */ 1516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSet *cinfo_set; /* set of _CvContourInfo nodes */ 1526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStoragePos initial_pos; /* starting storage pos */ 1536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStoragePos backup_pos; /* beginning of the latest approx. contour */ 1546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStoragePos backup_pos2; /* ending of the latest approx. contour */ 1556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn schar *img0; /* image origin */ 1566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn schar *img; /* current image row */ 1576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int img_step; /* image step */ 1586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSize img_size; /* ROI size */ 1596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvPoint offset; /* ROI offset: coordinates, added to each contour point */ 1606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvPoint pt; /* current scanner position */ 1616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvPoint lnbd; /* position of the last met contour */ 1626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int nbd; /* current mark val */ 1636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn _CvContourInfo *l_cinfo; /* information about latest approx. contour */ 1646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn _CvContourInfo cinfo_temp; /* temporary var which is used in simple modes */ 1656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn _CvContourInfo frame_info; /* information about frame */ 1666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq frame; /* frame itself */ 1676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int approx_method1; /* approx method when tracing */ 1686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int approx_method2; /* final approx method */ 1696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int mode; /* contour scanning mode: 1706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0 - external only 1716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1 - all the contours w/o any hierarchy 1726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2 - connected components (i.e. two-level structure - 1736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn external contours and holes) */ 1746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int subst_flag; 1756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int seq_type1; /* type of fetched contours */ 1766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int header_size1; /* hdr size of fetched contours */ 1776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int elem_size1; /* elem size of fetched contours */ 1786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int seq_type2; /* */ 1796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int header_size2; /* the same for approx. contours */ 1806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int elem_size2; /* */ 1816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn _CvContourInfo *cinfo_table[126]; 1826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn_CvContourScanner; 1846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define _CV_FIND_CONTOURS_FLAGS_EXTERNAL_ONLY 1 1866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define _CV_FIND_CONTOURS_FLAGS_HIERARCHIC 2 1876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* 1896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Initializes scanner structure. 1906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Prepare image for scanning ( clear borders and convert all pixels to 0-1. 1916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn*/ 1926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennCV_IMPL CvContourScanner 1936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RenncvStartFindContours( void* _img, CvMemStorage* storage, 1946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int header_size, int mode, 1956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int method, CvPoint offset ) 1966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int y; 1986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int step; 1996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSize size; 2006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn uchar *img = 0; 2016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvContourScanner scanner = 0; 2026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMat stub, *mat = (CvMat*)_img; 2036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_FUNCNAME( "cvStartFindContours" ); 2056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __BEGIN__; 2076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !storage ) 2096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsNullPtr, "" ); 2106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_CALL( mat = cvGetMat( mat, &stub )); 2126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !CV_IS_MASK_ARR( mat )) 2146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsUnsupportedFormat, "[Start]FindContours support only 8uC1 images" ); 2156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn size = cvSize( mat->width, mat->height ); 2176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn step = mat->step; 2186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn img = (uchar*)(mat->data.ptr); 2196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( method < 0 || method > CV_CHAIN_APPROX_TC89_KCOS ) 2216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR_FROM_STATUS( CV_BADRANGE_ERR ); 2226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( header_size < (int) (method == CV_CHAIN_CODE ? sizeof( CvChain ) : sizeof( CvContour ))) 2246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR_FROM_STATUS( CV_BADSIZE_ERR ); 2256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner = (CvContourScanner)cvAlloc( sizeof( *scanner )); 2276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !scanner ) 2286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR_FROM_STATUS( CV_OUTOFMEM_ERR ); 2296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memset( scanner, 0, sizeof( *scanner )); 2316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->storage1 = scanner->storage2 = storage; 2336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->img0 = (schar *) img; 2346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->img = (schar *) (img + step); 2356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->img_step = step; 2366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->img_size.width = size.width - 1; /* exclude rightest column */ 2376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->img_size.height = size.height - 1; /* exclude bottomost row */ 2386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->mode = mode; 2396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->offset = offset; 2406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->pt.x = scanner->pt.y = 1; 2416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->lnbd.x = 0; 2426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->lnbd.y = 1; 2436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->nbd = 2; 2446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->mode = (int) mode; 2456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->frame_info.contour = &(scanner->frame); 2466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->frame_info.is_hole = 1; 2476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->frame_info.next = 0; 2486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->frame_info.parent = 0; 2496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->frame_info.rect = cvRect( 0, 0, size.width, size.height ); 2506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->l_cinfo = 0; 2516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->subst_flag = 0; 2526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->frame.flags = CV_SEQ_FLAG_HOLE; 2546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->approx_method2 = scanner->approx_method1 = method; 2566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( method == CV_CHAIN_APPROX_TC89_L1 || method == CV_CHAIN_APPROX_TC89_KCOS ) 2586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->approx_method1 = CV_CHAIN_CODE; 2596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( scanner->approx_method1 == CV_CHAIN_CODE ) 2616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 2626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->seq_type1 = CV_SEQ_CHAIN_CONTOUR; 2636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->header_size1 = scanner->approx_method1 == scanner->approx_method2 ? 2646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn header_size : sizeof( CvChain ); 2656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->elem_size1 = sizeof( char ); 2666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 2676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 2686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 2696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->seq_type1 = CV_SEQ_POLYGON; 2706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->header_size1 = scanner->approx_method1 == scanner->approx_method2 ? 2716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn header_size : sizeof( CvContour ); 2726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->elem_size1 = sizeof( CvPoint ); 2736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 2746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->header_size2 = header_size; 2766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( scanner->approx_method2 == CV_CHAIN_CODE ) 2786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 2796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->seq_type2 = scanner->seq_type1; 2806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->elem_size2 = scanner->elem_size1; 2816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 2826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 2836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 2846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->seq_type2 = CV_SEQ_POLYGON; 2856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->elem_size2 = sizeof( CvPoint ); 2866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 2876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->seq_type1 = scanner->approx_method1 == CV_CHAIN_CODE ? 2896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_SEQ_CHAIN_CONTOUR : CV_SEQ_POLYGON; 2906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->seq_type2 = scanner->approx_method2 == CV_CHAIN_CODE ? 2926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_SEQ_CHAIN_CONTOUR : CV_SEQ_POLYGON; 2936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvSaveMemStoragePos( storage, &(scanner->initial_pos) ); 2956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( method > CV_CHAIN_APPROX_SIMPLE ) 2976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 2986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->storage1 = cvCreateChildMemStorage( scanner->storage2 ); 2996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( mode > CV_RETR_LIST ) 3026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->cinfo_storage = cvCreateChildMemStorage( scanner->storage2 ); 3046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->cinfo_set = cvCreateSet( 0, sizeof( CvSet ), sizeof( _CvContourInfo ), 3056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->cinfo_storage ); 3066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( scanner->cinfo_storage == 0 || scanner->cinfo_set == 0 ) 3076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR_FROM_STATUS( CV_OUTOFMEM_ERR ); 3086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* make zero borders */ 3116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memset( img, 0, size.width ); 3126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memset( img + step * (size.height - 1), 0, size.width ); 3136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( y = 1, img += step; y < size.height - 1; y++, img += step ) 3156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn img[0] = img[size.width - 1] = 0; 3176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* converts all pixels to 0 or 1 */ 3206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvThreshold( mat, mat, 0, 1, CV_THRESH_BINARY ); 3216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_CHECK(); 3226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __END__; 3246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( cvGetErrStatus() < 0 ) 3266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvFree( &scanner ); 3276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return scanner; 3296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 3306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* 3326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Final stage of contour processing. 3336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Three variants possible: 3346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1. Contour, which was retrieved using border following, is added to 3356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn the contour tree. It is the case when the icvSubstituteContour function 3366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn was not called after retrieving the contour. 3376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2. New contour, assigned by icvSubstituteContour function, is added to the 3396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tree. The retrieved contour itself is removed from the storage. 3406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Here two cases are possible: 3416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2a. If one deals with plane variant of algorithm 3426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (hierarchical strucutre is not reconstructed), 3436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn the contour is removed completely. 3446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2b. In hierarchical case, the header of the contour is not removed. 3456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn It's marked as "link to contour" and h_next pointer of it is set to 3466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new, substituting contour. 3476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3. The similar to 2, but when NULL pointer was assigned by 3496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvSubstituteContour function. In this case, the function removes 3506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn retrieved contour completely if plane case and 3516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn leaves header if hierarchical (but doesn't mark header as "link"). 3526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ------------------------------------------------------------------------ 3536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn The 1st variant can be used to retrieve and store all the contours from the image 3546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (with optional convertion from chains to contours using some approximation from 3556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn restriced set of methods). Some characteristics of contour can be computed in the 3566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn same pass. 3576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn The usage scheme can look like: 3596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvContourScanner scanner; 3616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStorage* contour_storage; 3626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* first_contour; 3636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvStatus result; 3646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ... 3666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvCreateMemStorage( &contour_storage, block_size/0 ); 3686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ... 3706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvStartFindContours 3726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ( img, contour_storage, 3736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn header_size, approx_method, 3746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn [external_only,] 3756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn &scanner ); 3766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for(;;) 3786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn [CvSeq* contour;] 3806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn result = icvFindNextContour( &scanner, &contour/0 ); 3816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( result != CV_OK ) break; 3836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // calculate some characteristics 3856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ... 3866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( result < 0 ) goto error_processing; 3896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvEndFindContours( &scanner, &first_contour ); 3916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ... 3926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ----------------------------------------------------------------- 3946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Second variant is more complex and can be used when someone wants store not 3966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn the retrieved contours but transformed ones. (e.g. approximated with some 3976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn non-default algorithm ). 3986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn The scheme can be the as following: 4006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvContourScanner scanner; 4026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStorage* contour_storage; 4036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStorage* temp_storage; 4046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* first_contour; 4056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvStatus result; 4066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ... 4086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvCreateMemStorage( &contour_storage, block_size/0 ); 4106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvCreateMemStorage( &temp_storage, block_size/0 ); 4116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ... 4136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvStartFindContours8uC1R 4156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ( <img_params>, temp_storage, 4166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn header_size, approx_method, 4176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn [retrival_mode], 4186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn &scanner ); 4196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for(;;) 4216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 4226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* temp_contour; 4236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* new_contour; 4246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn result = icvFindNextContour( scanner, &temp_contour ); 4256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( result != CV_OK ) break; 4276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn <approximation_function>( temp_contour, contour_storage, 4296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn &new_contour, <parameters...> ); 4306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvSubstituteContour( scanner, new_contour ); 4326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ... 4336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( result < 0 ) goto error_processing; 4366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvEndFindContours( &scanner, &first_contour ); 4386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ... 4396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ---------------------------------------------------------------------------- 4416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Third method to retrieve contours may be applied if contours are irrelevant 4426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn themselves but some characteristics of them are used only. 4436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn The usage is similar to second except slightly different internal loop 4446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for(;;) 4466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 4476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* temp_contour; 4486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn result = icvFindNextContour( &scanner, &temp_contour ); 4496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( result != CV_OK ) break; 4516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // calculate some characteristics of temp_contour 4536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvSubstituteContour( scanner, 0 ); 4556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ... 4566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn new_storage variable is not needed here. 4596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Two notes. 4616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1. Second and third method can interleave. I.e. it is possible to 4626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn remain contours that satisfy with some criteria and reject others. 4636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn In hierarchic case the resulting tree is the part of original tree with 4646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn some nodes absent. But in the resulting tree the contour1 is a child 4656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (may be indirect) of contour2 iff in the original tree the contour1 4666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn is a child (may be indirect) of contour2. 4676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn*/ 4686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void 4696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennicvEndProcessContour( CvContourScanner scanner ) 4706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 4716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn _CvContourInfo *l_cinfo = scanner->l_cinfo; 4726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( l_cinfo ) 4746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 4756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( scanner->subst_flag ) 4766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 4776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStoragePos temp; 4786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvSaveMemStoragePos( scanner->storage2, &temp ); 4806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( temp.top == scanner->backup_pos2.top && 4826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn temp.free_space == scanner->backup_pos2.free_space ) 4836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 4846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvRestoreMemStoragePos( scanner->storage2, &scanner->backup_pos ); 4856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->subst_flag = 0; 4876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( l_cinfo->contour ) 4906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 4916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvInsertNodeIntoTree( l_cinfo->contour, l_cinfo->parent->contour, 4926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn &(scanner->frame) ); 4936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->l_cinfo = 0; 4956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 4976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* replaces one contour with another */ 4996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennCV_IMPL void 5006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RenncvSubstituteContour( CvContourScanner scanner, CvSeq * new_contour ) 5016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 5026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn _CvContourInfo *l_cinfo; 5036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_FUNCNAME( "cvSubstituteContour" ); 5056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __BEGIN__; 5076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !scanner ) 5096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsNullPtr, "" ); 5106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo = scanner->l_cinfo; 5126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( l_cinfo && l_cinfo->contour && l_cinfo->contour != new_contour ) 5136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo->contour = new_contour; 5156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->subst_flag = 1; 5166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __END__; 5196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 5206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* 5236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn marks domain border with +/-<constant> and stores the contour into CvSeq. 5246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn method: 5256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn <0 - chain 5266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ==0 - direct 5276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn >0 - simple approximation 5286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn*/ 5296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic CvStatus 5306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennicvFetchContour( schar *ptr, 5316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int step, 5326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvPoint pt, 5336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* contour, 5346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int _method ) 5356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 5366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const schar nbd = 2; 5376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int deltas[16]; 5386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeqWriter writer; 5396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn schar *i0 = ptr, *i1, *i3, *i4 = 0; 5406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int prev_s = -1, s, s_end; 5416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int method = _method - 1; 5426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( (unsigned) _method <= CV_CHAIN_APPROX_SIMPLE ); 5446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* initialize local state */ 5466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_INIT_3X3_DELTAS( deltas, step, 1 ); 5476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memcpy( deltas + 8, deltas, 8 * sizeof( deltas[0] )); 5486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* initialize writer */ 5506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvStartAppendToSeq( contour, &writer ); 5516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( method < 0 ) 5536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ((CvChain *) contour)->origin = pt; 5546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s_end = s = CV_IS_SEQ_HOLE( contour ) ? 0 : 4; 5566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn do 5586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s = (s - 1) & 7; 5606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i1 = i0 + deltas[s]; 5616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( *i1 != 0 ) 5626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 5636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while( s != s_end ); 5656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( s == s_end ) /* single pixel domain */ 5676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *i0 = (schar) (nbd | -128); 5696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( method >= 0 ) 5706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( pt, writer ); 5726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 5756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i3 = i0; 5776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_s = s ^ 4; 5786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* follow border */ 5806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ;; ) 5816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s_end = s; 5836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ;; ) 5856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i4 = i3 + deltas[++s]; 5876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( *i4 != 0 ) 5886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 5896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s &= 7; 5916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* check "right" bound */ 5936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( (unsigned) (s - 1) < (unsigned) s_end ) 5946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *i3 = (schar) (nbd | -128); 5966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else if( *i3 == 1 ) 5986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *i3 = nbd; 6006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 6016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( method < 0 ) 6036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 6046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn schar _s = (schar) s; 6056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( _s, writer ); 6076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 6086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 6096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 6106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( s != prev_s || method == 0 ) 6116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 6126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( pt, writer ); 6136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_s = s; 6146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 6156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn pt.x += icvCodeDeltas[s].x; 6176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn pt.y += icvCodeDeltas[s].y; 6186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 6206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( i4 == i0 && i3 == i1 ) 6226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 6236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i3 = i4; 6256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s = (s + 4) & 7; 6266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } /* end of border following loop */ 6276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 6286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvEndWriteSeq( &writer ); 6306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( _method != CV_CHAIN_CODE ) 6326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvBoundingRect( contour, 1 ); 6336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( writer.seq->total == 0 && writer.seq->first == 0 || 6356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn writer.seq->total > writer.seq->first->count || 6366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (writer.seq->first->prev == writer.seq->first && 6376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn writer.seq->first->next == writer.seq->first) ); 6386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return CV_OK; 6406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 6416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* 6456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn trace contour until certain point is met. 6466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn returns 1 if met, 0 else. 6476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn*/ 6486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic int 6496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennicvTraceContour( schar *ptr, int step, schar *stop_ptr, int is_hole ) 6506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 6516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int deltas[16]; 6526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn schar *i0 = ptr, *i1, *i3, *i4; 6536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int s, s_end; 6546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* initialize local state */ 6566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_INIT_3X3_DELTAS( deltas, step, 1 ); 6576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memcpy( deltas + 8, deltas, 8 * sizeof( deltas[0] )); 6586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( (*i0 & -2) != 0 ); 6606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s_end = s = is_hole ? 0 : 4; 6626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn do 6646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 6656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s = (s - 1) & 7; 6666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i1 = i0 + deltas[s]; 6676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( *i1 != 0 ) 6686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 6696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 6706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while( s != s_end ); 6716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i3 = i0; 6736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* check single pixel domain */ 6756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( s != s_end ) 6766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 6776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* follow border */ 6786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ;; ) 6796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 6806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s_end = s; 6816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ;; ) 6836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 6846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i4 = i3 + deltas[++s]; 6856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( *i4 != 0 ) 6866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 6876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 6886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( i3 == stop_ptr || (i4 == i0 && i3 == i1) ) 6906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 6916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i3 = i4; 6936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s = (s + 4) & 7; 6946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } /* end of border following loop */ 6956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 6966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return i3 == stop_ptr; 6976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 6986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic CvStatus 7016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennicvFetchContourEx( schar* ptr, 7026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int step, 7036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvPoint pt, 7046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* contour, 7056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int _method, 7066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int nbd, 7076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvRect* _rect ) 7086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 7096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int deltas[16]; 7106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeqWriter writer; 7116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn schar *i0 = ptr, *i1, *i3, *i4; 7126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvRect rect; 7136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int prev_s = -1, s, s_end; 7146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int method = _method - 1; 7156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( (unsigned) _method <= CV_CHAIN_APPROX_SIMPLE ); 7176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( 1 < nbd && nbd < 128 ); 7186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* initialize local state */ 7206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_INIT_3X3_DELTAS( deltas, step, 1 ); 7216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memcpy( deltas + 8, deltas, 8 * sizeof( deltas[0] )); 7226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* initialize writer */ 7246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvStartAppendToSeq( contour, &writer ); 7256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( method < 0 ) 7276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ((CvChain *)contour)->origin = pt; 7286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rect.x = rect.width = pt.x; 7306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rect.y = rect.height = pt.y; 7316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s_end = s = CV_IS_SEQ_HOLE( contour ) ? 0 : 4; 7336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn do 7356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s = (s - 1) & 7; 7376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i1 = i0 + deltas[s]; 7386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( *i1 != 0 ) 7396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 7406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 7416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while( s != s_end ); 7426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( s == s_end ) /* single pixel domain */ 7446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *i0 = (schar) (nbd | 0x80); 7466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( method >= 0 ) 7476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( pt, writer ); 7496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 7506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 7516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 7526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i3 = i0; 7546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_s = s ^ 4; 7566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* follow border */ 7586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ;; ) 7596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s_end = s; 7616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ;; ) 7636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i4 = i3 + deltas[++s]; 7656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( *i4 != 0 ) 7666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 7676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 7686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s &= 7; 7696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* check "right" bound */ 7716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( (unsigned) (s - 1) < (unsigned) s_end ) 7726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *i3 = (schar) (nbd | 0x80); 7746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 7756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else if( *i3 == 1 ) 7766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *i3 = (schar) nbd; 7786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 7796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( method < 0 ) 7816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn schar _s = (schar) s; 7836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( _s, writer ); 7846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 7856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else if( s != prev_s || method == 0 ) 7866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( pt, writer ); 7886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 7896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( s != prev_s ) 7916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* update bounds */ 7936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( pt.x < rect.x ) 7946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rect.x = pt.x; 7956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else if( pt.x > rect.width ) 7966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rect.width = pt.x; 7976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( pt.y < rect.y ) 7996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rect.y = pt.y; 8006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else if( pt.y > rect.height ) 8016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rect.height = pt.y; 8026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 8036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_s = s; 8056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn pt.x += icvCodeDeltas[s].x; 8066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn pt.y += icvCodeDeltas[s].y; 8076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( i4 == i0 && i3 == i1 ) break; 8096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i3 = i4; 8116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s = (s + 4) & 7; 8126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } /* end of border following loop */ 8136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 8146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rect.width -= rect.x - 1; 8166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rect.height -= rect.y - 1; 8176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvEndWriteSeq( &writer ); 8196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( _method != CV_CHAIN_CODE ) 8216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ((CvContour*)contour)->rect = rect; 8226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( writer.seq->total == 0 && writer.seq->first == 0 || 8246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn writer.seq->total > writer.seq->first->count || 8256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (writer.seq->first->prev == writer.seq->first && 8266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn writer.seq->first->next == writer.seq->first) ); 8276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( _rect ) *_rect = rect; 8296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return CV_OK; 8316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 8326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennCvSeq * 8356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RenncvFindNextContour( CvContourScanner scanner ) 8366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 8376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn schar *img0; 8386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn schar *img; 8396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int step; 8406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int width, height; 8416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x, y; 8426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int prev; 8436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvPoint lnbd; 8446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq *contour = 0; 8456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int nbd; 8466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int mode; 8476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvStatus result = (CvStatus) 1; 8486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_FUNCNAME( "cvFindNextContour" ); 8506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __BEGIN__; 8526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !scanner ) 8546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsNullPtr, "" ); 8556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvEndProcessContour( scanner ); 8566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* initialize local state */ 8586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn img0 = scanner->img0; 8596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn img = scanner->img; 8606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn step = scanner->img_step; 8616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x = scanner->pt.x; 8626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn y = scanner->pt.y; 8636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn width = scanner->img_size.width; 8646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn height = scanner->img_size.height; 8656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn mode = scanner->mode; 8666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lnbd = scanner->lnbd; 8676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn nbd = scanner->nbd; 8686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev = img[x - 1]; 8706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ; y < height; y++, img += step ) 8726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 8736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ; x < width; x++ ) 8746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 8756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int p = img[x]; 8766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( p != prev ) 8786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 8796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn _CvContourInfo *par_info = 0; 8806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn _CvContourInfo *l_cinfo = 0; 8816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq *seq = 0; 8826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int is_hole = 0; 8836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvPoint origin; 8846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !(prev == 0 && p == 1) ) /* if not external contour */ 8866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 8876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* check hole */ 8886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( p != 0 || prev < 1 ) 8896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto resume_scan; 8906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( prev & -2 ) 8926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 8936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lnbd.x = x - 1; 8946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 8956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn is_hole = 1; 8966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 8976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( mode == 0 && (is_hole || img0[lnbd.y * step + lnbd.x] > 0) ) 8996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto resume_scan; 9006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn origin.y = y; 9026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn origin.x = x - is_hole; 9036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* find contour parent */ 9056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( mode <= 1 || (!is_hole && mode == 2) || lnbd.x <= 0 ) 9066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn par_info = &(scanner->frame_info); 9086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 9106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int lval = img0[lnbd.y * step + lnbd.x] & 0x7f; 9126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn _CvContourInfo *cur = scanner->cinfo_table[lval - 2]; 9136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( lval >= 2 ); 9156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* find the first bounding contour */ 9176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while( cur ) 9186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( (unsigned) (lnbd.x - cur->rect.x) < (unsigned) cur->rect.width && 9206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (unsigned) (lnbd.y - cur->rect.y) < (unsigned) cur->rect.height ) 9216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( par_info ) 9236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( icvTraceContour( scanner->img0 + 9256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn par_info->origin.y * step + 9266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn par_info->origin.x, step, img + lnbd.x, 9276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn par_info->is_hole ) > 0 ) 9286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 9296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn par_info = cur; 9316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cur = cur->next; 9336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( par_info != 0 ); 9366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* if current contour is a hole and previous contour is a hole or 9386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn current contour is external and previous contour is external then 9396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn the parent of the contour is the parent of the previous contour else 9406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn the parent is the previous contour itself. */ 9416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( par_info->is_hole == is_hole ) 9426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn par_info = par_info->parent; 9446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* every contour must have a parent 9456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (at least, the frame of the image) */ 9466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !par_info ) 9476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn par_info = &(scanner->frame_info); 9486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* hole flag of the parent must differ from the flag of the contour */ 9516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( par_info->is_hole != is_hole ); 9526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( par_info->contour == 0 ) /* removed contour */ 9536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto resume_scan; 9546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lnbd.x = x - is_hole; 9576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvSaveMemStoragePos( scanner->storage2, &(scanner->backup_pos) ); 9596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn seq = cvCreateSeq( scanner->seq_type1, scanner->header_size1, 9616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->elem_size1, scanner->storage1 ); 9626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !seq ) 9636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn result = CV_OUTOFMEM_ERR; 9656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto exit_func; 9666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn seq->flags |= is_hole ? CV_SEQ_FLAG_HOLE : 0; 9686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* initialize header */ 9706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( mode <= 1 ) 9716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo = &(scanner->cinfo_temp); 9736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn result = icvFetchContour( img + x - is_hole, step, 9746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvPoint( origin.x + scanner->offset.x, 9756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn origin.y + scanner->offset.y), 9766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn seq, scanner->approx_method1 ); 9776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( result < 0 ) 9786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto exit_func; 9796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 9816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn union { _CvContourInfo* ci; CvSetElem* se; } v; 9836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn v.ci = l_cinfo; 9846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvSetAdd( scanner->cinfo_set, 0, &v.se ); 9856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo = v.ci; 9866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn result = icvFetchContourEx( img + x - is_hole, step, 9886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvPoint( origin.x + scanner->offset.x, 9896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn origin.y + scanner->offset.y), 9906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn seq, scanner->approx_method1, 9916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn nbd, &(l_cinfo->rect) ); 9926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( result < 0 ) 9936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto exit_func; 9946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo->rect.x -= scanner->offset.x; 9956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo->rect.y -= scanner->offset.y; 9966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo->next = scanner->cinfo_table[nbd - 2]; 9986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->cinfo_table[nbd - 2] = l_cinfo; 9996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* change nbd */ 10016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn nbd = (nbd + 1) & 127; 10026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn nbd += nbd == 0 ? 3 : 0; 10036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo->is_hole = is_hole; 10066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo->contour = seq; 10076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo->origin = origin; 10086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo->parent = par_info; 10096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( scanner->approx_method1 != scanner->approx_method2 ) 10116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 10126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn result = icvApproximateChainTC89( (CvChain *) seq, 10136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->header_size2, 10146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->storage2, 10156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn &(l_cinfo->contour), 10166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->approx_method2 ); 10176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( result < 0 ) 10186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto exit_func; 10196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvClearMemStorage( scanner->storage1 ); 10206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo->contour->v_prev = l_cinfo->parent->contour; 10236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( par_info->contour == 0 ) 10256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 10266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn l_cinfo->contour = 0; 10276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( scanner->storage1 == scanner->storage2 ) 10286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 10296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvRestoreMemStoragePos( scanner->storage1, &(scanner->backup_pos) ); 10306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 10326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 10336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvClearMemStorage( scanner->storage1 ); 10346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn p = img[x]; 10366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto resume_scan; 10376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvSaveMemStoragePos( scanner->storage2, &(scanner->backup_pos2) ); 10406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->l_cinfo = l_cinfo; 10416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->pt.x = x + 1; 10426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->pt.y = y; 10436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->lnbd = lnbd; 10446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->img = (schar *) img; 10456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner->nbd = nbd; 10466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn contour = l_cinfo->contour; 10476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn result = CV_OK; 10496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto exit_func; 10506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn resume_scan: 10516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev = p; 10526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* update lnbd */ 10536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( prev & -2 ) 10546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 10556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lnbd.x = x; 10566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } /* end of prev != p */ 10586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } /* end of loop on x */ 10596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lnbd.x = 0; 10616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lnbd.y = y + 1; 10626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x = 1; 10636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev = 0; 10646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } /* end of loop on y */ 10666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn exit_func: 10686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( result != 0 ) 10706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn contour = 0; 10716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( result < 0 ) 10726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR_FROM_STATUS( result ); 10736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __END__; 10756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return contour; 10776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 10786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* 10816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn The function add to tree the last retrieved/substituted contour, 10826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn releases temp_storage, restores state of dst_storage (if needed), and 10836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn returns pointer to root of the contour tree */ 10846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennCV_IMPL CvSeq * 10856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RenncvEndFindContours( CvContourScanner * _scanner ) 10866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 10876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvContourScanner scanner; 10886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq *first = 0; 10896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_FUNCNAME( "cvFindNextContour" ); 10916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __BEGIN__; 10936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !_scanner ) 10956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsNullPtr, "" ); 10966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn scanner = *_scanner; 10976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( scanner ) 10996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvEndProcessContour( scanner ); 11016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( scanner->storage1 != scanner->storage2 ) 11036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvReleaseMemStorage( &(scanner->storage1) ); 11046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( scanner->cinfo_storage ) 11066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvReleaseMemStorage( &(scanner->cinfo_storage) ); 11076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn first = scanner->frame.v_next; 11096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvFree( _scanner ); 11106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 11116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __END__; 11136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return first; 11156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 11166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define ICV_SINGLE 0 11196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define ICV_CONNECTING_ABOVE 1 11206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define ICV_CONNECTING_BELOW -1 11216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define ICV_IS_COMPONENT_POINT(val) ((val) != 0) 11226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define CV_GET_WRITTEN_ELEM( writer ) ((writer).ptr - (writer).seq->elem_size) 11246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renntypedef struct CvLinkedRunPoint 11266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 11276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct CvLinkedRunPoint* link; 11286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct CvLinkedRunPoint* next; 11296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvPoint pt; 11306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 11316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennCvLinkedRunPoint; 11326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic int 11356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennicvFindContoursInInterval( const CvArr* src, 11366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /*int minValue, int maxValue,*/ 11376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStorage* storage, 11386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq** result, 11396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int contourHeaderSize ) 11406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 11416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int count = 0; 11426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStorage* storage00 = 0; 11436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMemStorage* storage01 = 0; 11446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* first = 0; 11456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_FUNCNAME( "icvFindContoursInInterval" ); 11476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __BEGIN__; 11496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int i, j, k, n; 11516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn uchar* src_data = 0; 11536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int img_step = 0; 11546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSize img_size; 11556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int connect_flag; 11576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int lower_total; 11586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int upper_total; 11596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int all_total; 11606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* runs; 11626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvLinkedRunPoint tmp; 11636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvLinkedRunPoint* tmp_prev; 11646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvLinkedRunPoint* upper_line = 0; 11656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvLinkedRunPoint* lower_line = 0; 11666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvLinkedRunPoint* last_elem; 11676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvLinkedRunPoint* upper_run = 0; 11696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvLinkedRunPoint* lower_run = 0; 11706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvLinkedRunPoint* prev_point = 0; 11716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeqWriter writer_ext; 11736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeqWriter writer_int; 11746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeqWriter writer; 11756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeqReader reader; 11766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* external_contours; 11786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* internal_contours; 11796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* prev = 0; 11806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !storage ) 11826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsNullPtr, "NULL storage pointer" ); 11836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !result ) 11856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsNullPtr, "NULL double CvSeq pointer" ); 11866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( contourHeaderSize < (int)sizeof(CvContour)) 11886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsBadSize, "Contour header size must be >= sizeof(CvContour)" ); 11896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_CALL( storage00 = cvCreateChildMemStorage(storage)); 11916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_CALL( storage01 = cvCreateChildMemStorage(storage)); 11926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvMat stub, *mat; 11956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_CALL( mat = cvGetMat( src, &stub )); 11976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !CV_IS_MASK_ARR(mat)) 11986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsBadArg, "Input array must be 8uC1 or 8sC1" ); 11996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn src_data = mat->data.ptr; 12006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn img_step = mat->step; 12016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn img_size = cvGetMatSize( mat ); 12026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // Create temporary sequences 12056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn runs = cvCreateSeq(0, sizeof(CvSeq), sizeof(CvLinkedRunPoint), storage00 ); 12066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvStartAppendToSeq( runs, &writer ); 12076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvStartWriteSeq( 0, sizeof(CvSeq), sizeof(CvLinkedRunPoint*), storage01, &writer_ext ); 12096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvStartWriteSeq( 0, sizeof(CvSeq), sizeof(CvLinkedRunPoint*), storage01, &writer_int ); 12106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev = &(tmp); 12126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev->next = 0; 12136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev->link = 0; 12146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // First line. None of runs is binded 12166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp.pt.y = 0; 12176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i = 0; 12186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( tmp, writer ); 12196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_line = (CvLinkedRunPoint*)CV_GET_WRITTEN_ELEM( writer ); 12206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev = upper_line; 12226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( j = 0; j < img_size.width; ) 12236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ; j < img_size.width && !ICV_IS_COMPONENT_POINT(src_data[j]); j++ ) 12256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ; 12266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( j == img_size.width ) 12276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 12286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp.pt.x = j; 12306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( tmp, writer ); 12316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev->next = (CvLinkedRunPoint*)CV_GET_WRITTEN_ELEM( writer ); 12326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev = tmp_prev->next; 12336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ; j < img_size.width && ICV_IS_COMPONENT_POINT(src_data[j]); j++ ) 12356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ; 12366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp.pt.x = j-1; 12386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( tmp, writer ); 12396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev->next = (CvLinkedRunPoint*)CV_GET_WRITTEN_ELEM( writer ); 12406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev->link = tmp_prev->next; 12416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // First point of contour 12426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( tmp_prev, writer_ext ); 12436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev = tmp_prev->next; 12446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvFlushSeqWriter( &writer ); 12466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_line = upper_line->next; 12476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_total = runs->total - 1; 12486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn last_elem = tmp_prev; 12496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev->next = 0; 12506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 1; i < img_size.height; i++ ) 12526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn//------// Find runs in next line 12546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn src_data += img_step; 12556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp.pt.y = i; 12566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn all_total = runs->total; 12576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( j = 0; j < img_size.width; ) 12586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ; j < img_size.width && !ICV_IS_COMPONENT_POINT(src_data[j]); j++ ) 12606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ; 12616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( j == img_size.width ) break; 12626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp.pt.x = j; 12646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( tmp, writer ); 12656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev->next = (CvLinkedRunPoint*)CV_GET_WRITTEN_ELEM( writer ); 12666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev = tmp_prev->next; 12676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ; j < img_size.width && ICV_IS_COMPONENT_POINT(src_data[j]); j++ ) 12696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ; 12706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp.pt.x = j-1; 12726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( tmp, writer ); 12736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev = tmp_prev->next = (CvLinkedRunPoint*)CV_GET_WRITTEN_ELEM( writer ); 12746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn }//j 12756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvFlushSeqWriter( &writer ); 12766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_line = last_elem->next; 12776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_total = runs->total - all_total; 12786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn last_elem = tmp_prev; 12796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tmp_prev->next = 0; 12806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn//------// 12816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn//------// Find links between runs of lower_line and upper_line 12826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run = upper_line; 12836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_run = lower_line; 12846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn connect_flag = ICV_SINGLE; 12856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( k = 0, n = 0; k < upper_total/2 && n < lower_total/2; ) 12876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn switch( connect_flag ) 12896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case ICV_SINGLE: 12916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( upper_run->next->pt.x < lower_run->next->pt.x ) 12926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( upper_run->next->pt.x >= lower_run->pt.x -1 ) 12946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_run->link = upper_run; 12966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn connect_flag = ICV_CONNECTING_ABOVE; 12976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_point = upper_run->next; 12986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 13006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run->next->link = upper_run; 13016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn k++; 13026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run = upper_run->next->next; 13036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 13056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( upper_run->pt.x <= lower_run->next->pt.x +1 ) 13076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_run->link = upper_run; 13096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn connect_flag = ICV_CONNECTING_BELOW; 13106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_point = lower_run->next; 13116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 13136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_run->link = lower_run->next; 13156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // First point of contour 13166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( lower_run, writer_ext ); 13176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn n++; 13196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_run = lower_run->next->next; 13206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 13226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case ICV_CONNECTING_ABOVE: 13236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( upper_run->pt.x > lower_run->next->pt.x +1 ) 13246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_point->link = lower_run->next; 13266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn connect_flag = ICV_SINGLE; 13276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn n++; 13286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_run = lower_run->next->next; 13296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 13316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_point->link = upper_run; 13336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( upper_run->next->pt.x < lower_run->next->pt.x ) 13346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn k++; 13366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_point = upper_run->next; 13376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run = upper_run->next->next; 13386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 13406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn connect_flag = ICV_CONNECTING_BELOW; 13426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_point = lower_run->next; 13436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn n++; 13446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_run = lower_run->next->next; 13456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 13486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case ICV_CONNECTING_BELOW: 13496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( lower_run->pt.x > upper_run->next->pt.x +1 ) 13506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run->next->link = prev_point; 13526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn connect_flag = ICV_SINGLE; 13536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn k++; 13546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run = upper_run->next->next; 13556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 13576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // First point of contour 13596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( lower_run, writer_int ); 13606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_run->link = prev_point; 13626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( lower_run->next->pt.x < upper_run->next->pt.x ) 13636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn n++; 13656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_point = lower_run->next; 13666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_run = lower_run->next->next; 13676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 13696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn connect_flag = ICV_CONNECTING_ABOVE; 13716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn k++; 13726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_point = upper_run->next; 13736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run = upper_run->next->next; 13746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 13776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn }// k, n 13796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ; n < lower_total/2; n++ ) 13816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( connect_flag != ICV_SINGLE ) 13836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev_point->link = lower_run->next; 13856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn connect_flag = ICV_SINGLE; 13866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_run = lower_run->next->next; 13876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn continue; 13886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_run->link = lower_run->next; 13906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn //First point of contour 13926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( lower_run, writer_ext ); 13936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lower_run = lower_run->next->next; 13956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ; k < upper_total/2; k++ ) 13986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( connect_flag != ICV_SINGLE ) 14006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 14016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run->next->link = prev_point; 14026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn connect_flag = ICV_SINGLE; 14036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run = upper_run->next->next; 14046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn continue; 14056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 14066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run->next->link = upper_run; 14076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run = upper_run->next->next; 14086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 14096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_line = lower_line; 14106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_total = lower_total; 14116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn }//i 14126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run = upper_line; 14146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn //the last line of image 14166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( k = 0; k < upper_total/2; k++ ) 14176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 14186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run->next->link = upper_run; 14196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn upper_run = upper_run->next->next; 14206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 14216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn//------// 14236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn//------//Find end read contours 14246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn external_contours = cvEndWriteSeq( &writer_ext ); 14256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn internal_contours = cvEndWriteSeq( &writer_int ); 14266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( k = 0; k < 2; k++ ) 14286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 14296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* contours = k == 0 ? external_contours : internal_contours; 14306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvStartReadSeq( contours, &reader ); 14326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( j = 0; j < contours->total; j++, count++ ) 14346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 14356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvLinkedRunPoint* p_temp; 14366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvLinkedRunPoint* p00; 14376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvLinkedRunPoint* p01; 14386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq* contour; 14396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_READ_SEQ_ELEM( p00, reader ); 14416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn p01 = p00; 14426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !p00->link ) 14446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn continue; 14456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvStartWriteSeq( CV_SEQ_ELTYPE_POINT | CV_SEQ_POLYLINE | CV_SEQ_FLAG_CLOSED, 14476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn contourHeaderSize, sizeof(CvPoint), storage, &writer ); 14486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn do 14496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 14506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_WRITE_SEQ_ELEM( p00->pt, writer ); 14516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn p_temp = p00; 14526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn p00 = p00->link; 14536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn p_temp->link = 0; 14546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 14556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while( p00 != p01 ); 14566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn contour = cvEndWriteSeq( &writer ); 14586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvBoundingRect( contour, 1 ); 14596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( k != 0 ) 14616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn contour->flags |= CV_SEQ_FLAG_HOLE; 14626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !first ) 14646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev = first = contour; 14656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 14666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 14676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn contour->h_prev = prev; 14686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn prev = prev->h_next = contour; 14696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 14706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 14716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 14726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __END__; 14746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !first ) 14766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn count = -1; 14776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( result ) 14796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *result = first; 14806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvReleaseMemStorage(&storage00); 14826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cvReleaseMemStorage(&storage01); 14836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return count; 14856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 14866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/*F/////////////////////////////////////////////////////////////////////////////////////// 14906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Name: cvFindContours 14916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Purpose: 14926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Finds all the contours on the bi-level image. 14936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Context: 14946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Parameters: 14956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// img - source image. 14966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Non-zero pixels are considered as 1-pixels 14976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// and zero pixels as 0-pixels. 14986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// step - full width of source image in bytes. 14996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// size - width and height of the image in pixels 15006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// storage - pointer to storage where will the output contours be placed. 15016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// header_size - header size of resulting contours 15026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// mode - mode of contour retrieval. 15036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// method - method of approximation that is applied to contours 15046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// first_contour - pointer to first contour pointer 15056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Returns: 15066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// CV_OK or error code 15076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Notes: 15086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn//F*/ 15096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennCV_IMPL int 15106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RenncvFindContours( void* img, CvMemStorage* storage, 15116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq** firstContour, int cntHeaderSize, 15126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int mode, 15136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int method, CvPoint offset ) 15146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 15156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvContourScanner scanner = 0; 15166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CvSeq *contour = 0; 15176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int count = -1; 15186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_FUNCNAME( "cvFindContours" ); 15206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __BEGIN__; 15226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !firstContour ) 15246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsNullPtr, "NULL double CvSeq pointer" ); 15256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( method == CV_LINK_RUNS ) 15276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 15286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( offset.x != 0 || offset.y != 0 ) 15296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_ERROR( CV_StsOutOfRange, 15306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn "Nonzero offset is not supported in CV_LINK_RUNS yet" ); 15316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_CALL( count = icvFindContoursInInterval( img, storage, 15336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn firstContour, cntHeaderSize )); 15346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 15356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 15366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 15376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn CV_CALL( scanner = cvStartFindContours( img, storage, 15386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cntHeaderSize, mode, method, offset )); 15396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( scanner ); 15406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn do 15426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 15436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn count++; 15446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn contour = cvFindNextContour( scanner ); 15456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 15466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while( contour != 0 ); 15476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *firstContour = cvEndFindContours( &scanner ); 15496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 15506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn __END__; 15526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return count; 15546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 15556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* End of file. */ 1558