OpenCV之图像轮廓检测及提取

 

代码功能：检测并画出图像中的轮廓

主要函数：cvFindContours、cvDrawContours

 1 #include <cv.h>
 2 #include <highgui.h>
 3 #include <cxcore.h>
 4 #include <iostream.h>
 5 
 6 void main()
 7 {
 8     int i=0;
 9     int mode=CV_RETR_CCOMP;           //the mode of contours
10     int num_contours=0;
11     CvScalar ext_color,inn_color;
12     
13     CvMemStorage*storage=cvCreateMemStorage(0);
14     CvSeq*contour=0;
15 
16     IplImage*pimg=NULL;
17     IplImage*CTImg=NULL;
18     IplImage*src=cvLoadImage("test.bmp",-1);
19 
20     pimg=cvCreateImage(cvGetSize(src),src->depth,1);
21     CTImg=cvCreateImage(cvGetSize(pimg),IPL_DEPTH_8U,3);
22     cvCvtColor(src,pimg,CV_BGR2GRAY);
23 
24     cvNamedWindow("source",CV_WINDOW_AUTOSIZE);
25     cvNamedWindow("gray",CV_WINDOW_AUTOSIZE);
26     cvNamedWindow("contours",CV_WINDOW_AUTOSIZE);
27 
28     cvShowImage("source",src);
29     //cvThreshold(pimg,pimg,200,250,CV_THRESH_BINARY);
30     cvErode(pimg,pimg,0,1);
31     cvDilate(pimg,pimg,0,1);
32     cvCanny(pimg,pimg,2,20,3);
33     //cvErode(pimg,pimg,0,2);
34     //cvDilate(pimg,pimg,0,1);
35     //Find the Contours
36     mode=CV_RETR_LIST;
37     num_contours=cvFindContours(pimg,storage,&contour,sizeof(CvContour),mode,CV_CHAIN_APPROX_NONE);
38     cout<<"The number of the contours is :"<<num_contours<<endl;
39     //Draw the Contours
40     for (;contour!=0;contour=contour->h_next)
41     {
42         inn_color=CV_RGB(rand()&255,rand()&255,rand()&255);
43         ext_color=CV_RGB(rand()&255,rand()&255,rand()&255);
44         cvDrawContours(CTImg,contour,ext_color,inn_color,1,2,8,cvPoint(0,0));
45     }
46 
47     cvShowImage("gray",pimg);
48     cvShowImage("contours",CTImg);
49     cvWaitKey(0);
50     cvSaveImage("Contours.bmp",CTImg);
51     cvSaveImage("Canny.bmp",pimg);
52 
53     cvReleaseImage(&pimg);
54     cvReleaseImage(&CTImg);
55     cvReleaseImage(&src);
56     cvReleaseMemStorage(&storage);
57 
58     cvDestroyAllWindows();
59 
60 }

效果图：

   

Posted on 2008-11-27 20:11  leivo  阅读(7012)  评论(0)  编辑  收藏  举报