1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17/* $Id: db_utilities_camera.cpp,v 1.3 2011/06/17 14:03:31 mbansal Exp $ */
18
19#include "db_utilities_camera.h"
20#include "db_utilities.h"
21#include <assert.h>
22
23
24
25/*****************************************************************
26*    Lean and mean begins here                                   *
27*****************************************************************/
28
29void db_Approx3DCalMat(double K[9],double Kinv[9],int im_width,int im_height,double f_correction,int field)
30{
31    double iw,ih,av_size,field_fact;
32
33    if(field) field_fact=2.0;
34    else field_fact=1.0;
35
36    iw=(double)im_width;
37    ih=(double)(im_height*field_fact);
38    av_size=(iw+ih)/2.0;
39    K[0]=f_correction*av_size;
40    K[1]=0;
41    K[2]=iw/2.0;
42    K[3]=0;
43    K[4]=f_correction*av_size/field_fact;
44    K[5]=ih/2.0/field_fact;
45    K[6]=0;
46    K[7]=0;
47    K[8]=1;
48
49    db_InvertCalibrationMatrix(Kinv,K);
50}
51