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preliminary version of a multi-level findcontours

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This commit is contained in:
Vadim Pisarevsky 2012-03-24 20:07:10 +00:00
parent f196dd5ff7
commit 648669cb81
1 changed files with 64 additions and 4 deletions
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66
samples/c/contours.c
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@ -29,6 +29,24 @@ void on_trackbar(int pos)
cvReleaseImage( &cnt_img ); cvReleaseImage( &cnt_img );
} }
static void findCComp( IplImage* img )
{
int x, y, cidx = 1;
IplImage* mask = cvCreateImage( cvSize(img->width+2, img->height+2), 8, 1 );
cvZero(mask);
cvRectangle( mask, cvPoint(0, 0), cvPoint(mask->width-1, mask->height-1),
cvScalarAll(1), 1, 8, 0 );
for( y = 0; y < img->height; y++ )
for( x = 0; x < img->width; x++ )
{
if( CV_IMAGE_ELEM(mask, uchar, y+1, x+1) != 0 )
continue;
cvFloodFill(img, cvPoint(x,y), cvScalarAll(cidx),
cvScalarAll(0), cvScalarAll(0), 0, 4, mask);
cidx++;
}
}
int main( int argc, char** argv ) int main( int argc, char** argv )
@ -36,6 +54,9 @@ int main( int argc, char** argv )
int i, j; int i, j;
CvMemStorage* storage = cvCreateMemStorage(0); CvMemStorage* storage = cvCreateMemStorage(0);
IplImage* img = cvCreateImage( cvSize(w,w), 8, 1 ); IplImage* img = cvCreateImage( cvSize(w,w), 8, 1 );
IplImage* img32f = cvCreateImage( cvSize(w,w), IPL_DEPTH_32F, 1 );
IplImage* img32s = cvCreateImage( cvSize(w,w), IPL_DEPTH_32S, 1 );
IplImage* img3 = cvCreateImage( cvSize(w,w), 8, 3 );
help(); help();
cvZero( img ); cvZero( img );
@ -54,7 +75,7 @@ int main( int argc, char** argv )
cvLine(img, cvPoint(cvRound(dx+100+j*10-80*cos(angle)), cvLine(img, cvPoint(cvRound(dx+100+j*10-80*cos(angle)),
cvRound(dy+100-90*sin(angle))), cvRound(dy+100-90*sin(angle))),
cvPoint(cvRound(dx+100+j*10-30*cos(angle)), cvPoint(cvRound(dx+100+j*10-30*cos(angle)),
cvRound(dy+100-30*sin(angle))), white, 1, 8, 0); cvRound(dy+100-30*sin(angle))), white, 3, 8, 0);
} }
} }
@ -73,9 +94,16 @@ int main( int argc, char** argv )
cvNamedWindow( "image", 1 ); cvNamedWindow( "image", 1 );
cvShowImage( "image", img ); cvShowImage( "image", img );
cvConvert( img, img32f );
findCComp( img32f );
cvConvert( img32f, img32s );
cvFindContours( img32s, storage, &contours, sizeof(CvContour),
CV_RETR_CCOMP, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0) );
//cvFindContours( img, storage, &contours, sizeof(CvContour),
// CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0) );
cvFindContours( img, storage, &contours, sizeof(CvContour),
CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0) );
{ {
const char* attrs[] = {"recursive", "1", 0}; const char* attrs[] = {"recursive", "1", 0};
@ -89,10 +117,42 @@ int main( int argc, char** argv )
cvNamedWindow( "contours", 1 ); cvNamedWindow( "contours", 1 );
cvCreateTrackbar( "levels+3", "contours", &levels, 7, on_trackbar ); cvCreateTrackbar( "levels+3", "contours", &levels, 7, on_trackbar );
{
CvRNG rng = cvRNG(-1);
CvSeq* tcontours = contours;
cvCvtColor( img, img3, CV_GRAY2BGR );
while( tcontours->h_next )
tcontours = tcontours->h_next;
for( ; tcontours != 0; tcontours = tcontours->h_prev )
{
CvScalar color;
color.val[0] = cvRandInt(&rng) % 256;
color.val[1] = cvRandInt(&rng) % 256;
color.val[2] = cvRandInt(&rng) % 256;
color.val[3] = cvRandInt(&rng) % 256;
cvDrawContours(img3, tcontours, color, color, 0, -1, 8, cvPoint(0,0));
if( tcontours->v_next )
{
color.val[0] = cvRandInt(&rng) % 256;
color.val[1] = cvRandInt(&rng) % 256;
color.val[2] = cvRandInt(&rng) % 256;
color.val[3] = cvRandInt(&rng) % 256;
cvDrawContours(img3, tcontours->v_next, color, color, 1, -1, 8, cvPoint(0,0));
}
}
}
cvShowImage( "colored", img3 );
on_trackbar(0); on_trackbar(0);
cvWaitKey(0); cvWaitKey(0);
cvReleaseMemStorage( &storage ); cvReleaseMemStorage( &storage );
cvReleaseImage( &img ); cvReleaseImage( &img );
cvReleaseImage( &img32f );
cvReleaseImage( &img32s );
cvReleaseImage( &img3 );
return 0; return 0;
} }