opencv寻找轮廓源代码

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#include "cv.h"

#include "highgui.h"

IplImage* src;

IplImage* img;

IplImage* dst;

CvMemStorage* storage=NULL;

int thresh=50;

void on_trackbar(int pos)

{

CvSeq* contour=0;

if(storage==NULL)

{

dst=cvCreateImage(cvGetSize(src),8,3);

storage=cvCreateMemStorage(0);

}

else

{

cvClearMemStorage(storage);

}

cvSmooth(src,src,CV_GAUSSIAN,3,3,0,0);

cvThreshold( src,img,thresh,200,CV_THRESH_BINARY);

cvNamedWindow( "threshold",1);

cvShowImage( "threshold", img );

cvFindContours(img,storage,&contour,sizeof(CvContour),CV_RETR_CCOMP,CV_CHAIN_APPROX_NONE,cvPoint(0,0));

cvZero( dst );

//cvDrawContours(dst,contour,CV_RGB(255,0,0),CV_RGB(0,255,0),-1,1,CV_AA,cvPoint(0,0));

for( ; contour; contour = contour->h_next )

{

CvRect rect=cvBoundingRect(contour,1);

CvPoint pt1=cvPoint(rect.x,rect.y),

pt2=cvPoint(rect.x+rect.width,rect.y+rect.height);

cvRectangle(dst,pt1,pt2,CV_RGB(255,0,0),1,CV_AA,0);

cvLine(dst,pt1,pt2,CV_RGB(0,255,0),1,CV_AA,0);

pt1=cvPoint(rect.x,rect.y+rect.height),

pt2=cvPoint(rect.x+rect.width,rect.y);

cvLine(dst,pt1,pt2,CV_RGB(0,255,0),1,CV_AA,0);

}

cvShowImage( "Components", dst );

}

int main( int argc, char** argv )

{

if(argc==2&&(src=cvLoadImage(argv[1],0))!=0)

{

img=cvCreateImage(cvGetSize(src),8,1);

cvNamedWindow( "Source",1);

cvShowImage( "Source", src );

cvNamedWindow( "Components",1);

cvCreateTrackbar("Threshold","Components",&thresh,200,on_trackbar);

on_trackbar(0);

cvWaitKey(0);

cvDestroyWindow( "sorce" );

cvDestroyWindow( "threshold" );

cvDestroyWindow( "Components" );

cvReleaseImage( &src);

cvReleaseImage( &img );

cvReleaseImage(&dst);

cvReleaseMemStorage(&storage);

}