opencv 轮廓的凸包，凸缺陷

代码：

[cpp] view plaincopy

1. #include <cv.h>  
2. #include <cxcore.h>  
3. #include <highgui.h>  
4. #include <cvaux.h>  
5. #include <iostream>  
6. using namespace std;  
7.   
8. int main()  
9. {  
10.     IplImage *src = cvLoadImage("f:\\images\\test2.bmp",CV_LOAD_IMAGE_GRAYSCALE);  
11.     IplImage *dst = cvCreateImage(cvGetSize(src),8,3);cvZero(dst);  
12.     CvMemStorage *storage = cvCreateMemStorage();  
13.     CvSeq *contour = NULL , *hull = NULL;  
14.   
15.     CvContourScanner scanner = cvStartFindContours(src,storage);  
16.     while((contour = cvFindNextContour(scanner)) != NULL){  
17.         cvDrawContours(dst,contour,CV_RGB(255,0,0),CV_RGB(0,255,0),0);  
18.           
19.         cout<<cvCheckContourConvexity(contour)<<endl;  
20.   
21.         hull = cvConvexHull2(contour,0,CV_CLOCKWISE,0);  
22.           
23.         CvPoint pt0 = **(CvPoint**)cvGetSeqElem(hull,hull->total - 1);  
24.         for(int i = 0;i<hull->total;++i){  
25.             CvPoint pt1 = **(CvPoint**)cvGetSeqElem(hull,i);  
26.             cvLine(dst,pt0,pt1,CV_RGB(0,0,255));  
27.             pt0 = pt1;  
28.         }  
29.   
30.         CvSeq *defect = cvConvexityDefects(contour,hull);  
31.           
32.         for(int i = 0;i<defect->total;++i){  
33.             CvConvexityDefect df = *(CvConvexityDefect*)cvGetSeqElem(defect,i);  
34.             cvCircle(dst,*df.start,2,CV_RGB(255,255,0),-1);  
35.             cvCircle(dst,*df.end,2,CV_RGB(255,255,0),-1);  
36.             cvCircle(dst,*df.depth_point,2,CV_RGB(0,255,255),-1);  
37.         }  
38.           
39.         cvShowImage("dst",dst);  
40.         cvWaitKey();  
41.     }  
42.     cvEndFindContours(&scanner);  
43. }  

网址：http://blog.csdn.net/fdl19881/article/details/6732682