1/*M///////////////////////////////////////////////////////////////////////////////////////
2//
3//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
4//
5//  By downloading, copying, installing or using the software you agree to this license.
6//  If you do not agree to this license, do not download, install,
7//  copy or use the software.
8//
9//
10//                        Intel License Agreement
11//                For Open Source Computer Vision Library
12//
13// Copyright (C) 2000, Intel Corporation, all rights reserved.
14// Third party copyrights are property of their respective owners.
15//
16// Redistribution and use in source and binary forms, with or without modification,
17// are permitted provided that the following conditions are met:
18//
19//   * Redistribution's of source code must retain the above copyright notice,
20//     this list of conditions and the following disclaimer.
21//
22//   * Redistribution's in binary form must reproduce the above copyright notice,
23//     this list of conditions and the following disclaimer in the documentation
24//     and/or other materials provided with the distribution.
25//
26//   * The name of Intel Corporation may not be used to endorse or promote products
27//     derived from this software without specific prior written permission.
28//
29// This software is provided by the copyright holders and contributors "as is" and
30// any express or implied warranties, including, but not limited to, the implied
31// warranties of merchantability and fitness for a particular purpose are disclaimed.
32// In no event shall the Intel Corporation or contributors be liable for any direct,
33// indirect, incidental, special, exemplary, or consequential damages
34// (including, but not limited to, procurement of substitute goods or services;
35// loss of use, data, or profits; or business interruption) however caused
36// and on any theory of liability, whether in contract, strict liability,
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38// the use of this software, even if advised of the possibility of such damage.
39//
40//M*/
41#include "_cvaux.h"
42
43#define CV_MAX2( a, b ) ((a)>(b) ? (a) : (b))
44#define CV_MIN2( a, b ) ((a)<(b) ? (a) : (b))
45
46/****************************************************************************************\
47
48   create hand mask
49
50\****************************************************************************************/
51
52static CvStatus icvCreateHandMask8uC1R(CvSeq * numbers,
53                                       uchar * image_mask, int step,
54                                       CvSize size, CvRect * roi )
55{
56
57    CvSeqReader reader;
58    CvPoint pt;
59    int k_point;
60    int i_min, i_max, j_min, j_max;
61
62    if( numbers == NULL )
63        return CV_NULLPTR_ERR;
64
65    if( !CV_IS_SEQ_POINT_SET( numbers ))
66        return CV_BADFLAG_ERR;
67
68    i_max = j_max = 0;
69    i_min = size.height;
70    j_min = size.width;
71
72    cvStartReadSeq( numbers, &reader, 0 );
73
74    k_point = numbers->total;
75    assert( k_point > 0 );
76    if( k_point <= 0 )
77        return CV_BADSIZE_ERR;
78
79    memset( image_mask, 0, step * size.height );
80
81    while( k_point-- > 0 )
82    {
83        CV_READ_SEQ_ELEM( pt, reader );
84
85        i_min = CV_MIN2( i_min, pt.y );
86        i_max = CV_MAX2( i_max, pt.y );
87        j_min = CV_MIN2( j_min, pt.x );
88        j_max = CV_MAX2( j_max, pt.x );
89
90        *(image_mask + pt.y * step + pt.x) = 255;
91    }
92
93    roi->x = j_min;
94    roi->y = i_min;
95    roi->width = j_max - j_min + 1;
96    roi->height = i_max - i_min + 1;
97
98    return CV_OK;
99
100}
101
102
103/*F///////////////////////////////////////////////////////////////////////////////////////
104//    Name:     cvCreateHandMask
105//    Purpose:  creates hand mask image
106//    Context:
107//    Parameters:
108//      numbers - pointer to the input sequence of the point's indexes inside
109//                hand region
110//      img_mask - pointer to the result mask image
111//      roi      - result hand mask ROI
112//
113//    Notes:
114//F*/
115CV_IMPL void
116cvCreateHandMask( CvSeq * numbers, IplImage * img_mask, CvRect * roi )
117{
118    uchar *img_mask_data = 0;
119    int img_mask_step = 0;
120    CvSize img_mask_size;
121
122    CV_FUNCNAME( "cvCreateHandMask" );
123
124    __BEGIN__;
125
126    if( img_mask->depth != IPL_DEPTH_8U )
127        CV_ERROR( CV_BadDepth, cvUnsupportedFormat );
128
129    if( img_mask->nChannels != 1 )
130        CV_ERROR( CV_BadNumChannels, "output image have wrong number of channels" );
131
132    cvGetImageRawData( img_mask, &img_mask_data, &img_mask_step, &img_mask_size );
133
134    IPPI_CALL( icvCreateHandMask8uC1R( numbers, img_mask_data,
135                                        img_mask_step, img_mask_size, roi ));
136
137    __END__;
138}
139