opencv 轮廓的凸包，凸缺陷

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代码：

#include <cv.h>#include <cxcore.h>#include <highgui.h>#include <cvaux.h>#include <iostream>using namespace std;int main(){IplImage *src = cvLoadImage("f:\\images\\test2.bmp",CV_LOAD_IMAGE_GRAYSCALE);IplImage *dst = cvCreateImage(cvGetSize(src),8,3);cvZero(dst);CvMemStorage *storage = cvCreateMemStorage();CvSeq *contour = NULL , *hull = NULL;CvContourScanner scanner = cvStartFindContours(src,storage);while((contour = cvFindNextContour(scanner)) != NULL){cvDrawContours(dst,contour,CV_RGB(255,0,0),CV_RGB(0,255,0),0);cout<<cvCheckContourConvexity(contour)<<endl;hull = cvConvexHull2(contour,0,CV_CLOCKWISE,0);CvPoint pt0 = **(CvPoint**)cvGetSeqElem(hull,hull->total - 1);for(int i = 0;i<hull->total;++i){CvPoint pt1 = **(CvPoint**)cvGetSeqElem(hull,i);cvLine(dst,pt0,pt1,CV_RGB(0,0,255));pt0 = pt1;}CvSeq *defect = cvConvexityDefects(contour,hull);for(int i = 0;i<defect->total;++i){CvConvexityDefect df = *(CvConvexityDefect*)cvGetSeqElem(defect,i);cvCircle(dst,*df.start,2,CV_RGB(255,255,0),-1);cvCircle(dst,*df.end,2,CV_RGB(255,255,0),-1);cvCircle(dst,*df.depth_point,2,CV_RGB(0,255,255),-1);}cvShowImage("dst",dst);cvWaitKey();}cvEndFindContours(&scanner);}