#include "opencv2/opencv.hpp"

 using namespace cv;

 void main()

 {

     Mat src=imread("E://22.jpg");

     Mat temp=src.clone();

     //转灰度图，二值化

     cvtColor(src,src,CV_BGR2GRAY);

     threshold(src,src,,,THRESH_BINARY);

     imshow("thres",src);

     //查找并绘制轮廓

     vector<vector<Point>>contours;

     vector<Vec4i>hierarcy;

     findContours(src,contours,hierarcy,CV_RETR_TREE,CV_LINK_RUNS);

     /*drawContours(temp,contours,-1,Scalar(0,255,0),2,8);    绘制并显示所有轮廓

     imshow("contours",temp);*/

     //绘制轮廓的每一个点

     for(int i=; i<contours.size(); i++){

         for(int j=; j<contours[i].size(); j++){

             circle(temp,Point(contours[i][j].x,contours[i][j].y),,Scalar(,,),,);

         }

     }

     imshow("contours",temp);

     waitKey();

 }

　　　　 for(int j=; j<contours[i].size(); j+=){

            circle(temp,Point(contours[i][j].x,contours[i][j].y),,Scalar(,,),,);

        }

 for(int i=; i<contours.size(); i++){

         for(int j=; j<contours[i].size(); j+=){

             circle(temp,Point(contours[i][j].x,contours[i][j].y),,Scalar(,,),,);

             line(temp,Point(,),Point(contours[i][j].x,contours[i][j].y), Scalar(, , ), , );

             waitKey();

             imshow("contours", temp);

         }

     }

 #include "opencv2/opencv.hpp"

 using namespace cv;

 void main()

 {

     Mat src=imread("E://33.jpg");

     Mat temp=src.clone();

     //转灰度图，二值化

     cvtColor(src,src,CV_BGR2GRAY);

     threshold(src,src,,,THRESH_BINARY);

     imshow("thres",src);

     //查找并绘制轮廓

     vector<vector<Point>>contours;

     vector<Vec4i>hierarcy;

     findContours(src,contours,hierarcy,CV_RETR_EXTERNAL,CV_CHAIN_APPROX_NONE);

     ///孔洞填充

     findContours(src, contours, hierarcy, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE); //查找轮廓

     drawContours(temp, contours, -, Scalar(, , ), -, ); //绘制轮廓

     imshow("contours",temp);

     waitKey();

 }