#include "highgui.h"
#include "cv.h"
#include <iostream>
using namespace std;
int main()
{
int i=0;
int mode = CV_RETR_CCOMP;//設置提取輪廓模式
int contours_num=0;//提取輪廓的數目
CvScalar external_color;//繪製輪廓線的顏色
CvScalar hole_color;
CvMemStorage *storage = cvCreateMemStorage(0);
CvSeq *contours =0;//存儲提取的輪廓圖像
IplImage *pImg = NULL;
IplImage *pContourImg = NULL;//顯示提取的輪廓圖像
IplImage *src=cvLoadImage("E:/Code/filter_image.bmp",1);
pImg = cvCreateImage(cvGetSize(src),src->depth,1);
pContourImg =cvCreateImage(cvGetSize(pImg),IPL_DEPTH_8U,3);
cvCvtColor(src,pImg,CV_BGR2GRAY);//將讀取的圖像轉化爲灰度圖像
cvNamedWindow("src",1);
cvNamedWindow("contour",1);
cvShowImage("src",src);//顯示原圖
cvThreshold(pImg,pImg,200,255,CV_THRESH_BINARY);//二值化
mode = CV_RETR_LIST;
contours_num=cvFindContours(pImg,storage,&contours,sizeof(CvContour),mode,CV_CHAIN_APPROX_NONE);
cout<<contours_num<<" "<<endl;//打印找到的輪廓的數目
for (;contours!=0;contours=contours->h_next)
{
hole_color=CV_RGB(rand()&255,rand()&255,rand()&255);
external_color = CV_RGB(rand()&255,rand()&255,rand()&255);
cvDrawContours(pContourImg,contours,external_color,hole_color,1,2,8);
}
cvShowImage("contour",pContourImg);
cvWaitKey(0);
cvReleaseImage(&src);
cvReleaseImage(&pImg);
cvReleaseImage(&pContourImg);
cvReleaseMemStorage(&storage);
return 0;
}
本文轉載於http://www.cnblogs.com/gnuhpc/archive/2012/07/02/2573806.html
另一個利用findContours()的版本demo:http://blog.sina.com.cn/s/blog_662c78590100z0rg.html
貼在這裏備用學習。