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,
37 // or tort (including negligence or otherwise) arising in any way out of
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 
52 static 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*/
115 CV_IMPL void
116 cvCreateHandMask( 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