vcs.maemo.org Git - opencv/blob - samples/c/facedetect.c

   1 #include "cv.h"
   2 #include "highgui.h"
   3
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <assert.h>
   8 #include <math.h>
   9 #include <float.h>
  10 #include <limits.h>
  11 #include <time.h>
  12 #include <ctype.h>
  13
  14 #ifdef _EiC
  15 #define WIN32
  16 #endif
  17
  18 static CvMemStorage* storage = 0;
  19 static CvHaarClassifierCascade* cascade = 0;
  20
  21 void detect_and_draw( IplImage* image );
  22
  23 const char* cascade_name =
  24     "haarcascade_frontalface_alt.xml";
  25 /*    "haarcascade_profileface.xml";*/
  26
  27 int main( int argc, char** argv )
  28 {
  29     CvCapture* capture = 0;
  30     IplImage *frame, *frame_copy = 0;
  31     int optlen = strlen("--cascade=");
  32     const char* input_name;
  33
  34     if( argc > 1 && strncmp( argv[1], "--cascade=", optlen ) == 0 )
  35     {
  36         cascade_name = argv[1] + optlen;
  37         input_name = argc > 2 ? argv[2] : 0;
  38     }
  39     else
  40     {
  41         cascade_name = "../../data/haarcascades/haarcascade_frontalface_alt2.xml";
  42         input_name = argc > 1 ? argv[1] : 0;
  43     }
  44
  45     cascade = (CvHaarClassifierCascade*)cvLoad( cascade_name, 0, 0, 0 );
  46
  47     if( !cascade )
  48     {
  49         fprintf( stderr, "ERROR: Could not load classifier cascade\n" );
  50         fprintf( stderr,
  51         "Usage: facedetect --cascade=\"<cascade_path>\" [filename|camera_index]\n" );
  52         return -1;
  53     }
  54     storage = cvCreateMemStorage(0);
  55
  56     if( !input_name || (isdigit(input_name[0]) && input_name[1] == '\0') )
  57         capture = cvCaptureFromCAM( !input_name ? 0 : input_name[0] - '0' );
  58     else
  59         capture = cvCaptureFromAVI( input_name );
  60
  61     cvNamedWindow( "result", 1 );
  62
  63     if( capture )
  64     {
  65         for(;;)
  66         {
  67             if( !cvGrabFrame( capture ))
  68                 break;
  69             frame = cvRetrieveFrame( capture );
  70             if( !frame )
  71                 break;
  72             if( !frame_copy )
  73                 frame_copy = cvCreateImage( cvSize(frame->width,frame->height),
  74                                             IPL_DEPTH_8U, frame->nChannels );
  75             if( frame->origin == IPL_ORIGIN_TL )
  76                 cvCopy( frame, frame_copy, 0 );
  77             else
  78                 cvFlip( frame, frame_copy, 0 );
  79
  80             detect_and_draw( frame_copy );
  81
  82             if( cvWaitKey( 10 ) >= 0 )
  83                 break;
  84         }
  85
  86         cvReleaseImage( &frame_copy );
  87         cvReleaseCapture( &capture );
  88     }
  89     else
  90     {
  91         const char* filename = input_name ? input_name : (char*)"lena.jpg";
  92         IplImage* image = cvLoadImage( filename, 1 );
  93
  94         if( image )
  95         {
  96             detect_and_draw( image );
  97             cvWaitKey(0);
  98             cvReleaseImage( &image );
  99         }
 100         else
 101         {
 102             /* assume it is a text file containing the
 103                list of the image filenames to be processed - one per line */
 104             FILE* f = fopen( filename, "rt" );
 105             if( f )
 106             {
 107                 char buf[1000+1];
 108                 while( fgets( buf, 1000, f ) )
 109                 {
 110                     int len = (int)strlen(buf);
 111                     while( len > 0 && isspace(buf[len-1]) )
 112                         len--;
 113                     buf[len] = '\0';
 114                     image = cvLoadImage( buf, 1 );
 115                     if( image )
 116                     {
 117                         detect_and_draw( image );
 118                         cvWaitKey(0);
 119                         cvReleaseImage( &image );
 120                     }
 121                 }
 122                 fclose(f);
 123             }
 124         }
 125
 126     }
 127
 128     cvDestroyWindow("result");
 129
 130     return 0;
 131 }
 132
 133 void detect_and_draw( IplImage* img )
 134 {
 135     static CvScalar colors[] =
 136     {
 137         {{0,0,255}},
 138         {{0,128,255}},
 139         {{0,255,255}},
 140         {{0,255,0}},
 141         {{255,128,0}},
 142         {{255,255,0}},
 143         {{255,0,0}},
 144         {{255,0,255}}
 145     };
 146
 147     double scale = 1.3;
 148     IplImage* gray = cvCreateImage( cvSize(img->width,img->height), 8, 1 );
 149     IplImage* small_img = cvCreateImage( cvSize( cvRound (img->width/scale),
 150                          cvRound (img->height/scale)),
 151                      8, 1 );
 152     int i;
 153
 154     cvCvtColor( img, gray, CV_BGR2GRAY );
 155     cvResize( gray, small_img, CV_INTER_LINEAR );
 156     cvEqualizeHist( small_img, small_img );
 157     cvClearMemStorage( storage );
 158
 159     if( cascade )
 160     {
 161         double t = (double)cvGetTickCount();
 162         CvSeq* faces = cvHaarDetectObjects( small_img, cascade, storage,
 163                                             1.1, 2, 0/*CV_HAAR_DO_CANNY_PRUNING*/,
 164                                             cvSize(30, 30) );
 165         t = (double)cvGetTickCount() - t;
 166         printf( "detection time = %gms\n", t/((double)cvGetTickFrequency()*1000.) );
 167         for( i = 0; i < (faces ? faces->total : 0); i++ )
 168         {
 169             CvRect* r = (CvRect*)cvGetSeqElem( faces, i );
 170             CvPoint center;
 171             int radius;
 172             center.x = cvRound((r->x + r->width*0.5)*scale);
 173             center.y = cvRound((r->y + r->height*0.5)*scale);
 174             radius = cvRound((r->width + r->height)*0.25*scale);
 175             cvCircle( img, center, radius, colors[i%8], 3, 8, 0 );
 176         }
 177     }
 178
 179     cvShowImage( "result", img );
 180     cvReleaseImage( &gray );
 181     cvReleaseImage( &small_img );
 182 }