1 #include <opencv2/opencv.hpp>  
 2 #include<iostream>  
 3 using namespace std;
 4 using namespace cv;
 5 
 6 
 7 int main()
 8 {
 9     Mat img_in,img_out;
10     
11     img_in = imread("1.jpg",0);
12     
13     threshold(img_in, img_out, 0, 255,THRESH_BINARY);
14     Mat img_out2;
15     vector< vector< Point> > contours;
16     findContours(img_out2, contours, RETR_TREE, CHAIN_APPROX_NONE);
17     vector<vector<Point> >::iterator itc = contours.begin();
18     while (itc != contours.end())
19     {
20         if (itc->size()<50)
21         {
22             itc = contours.erase(itc);
23         }
24         else
25         {
26             ++itc;
27         }
28     }
29     drawContours(img_out2, contours, -1, Scalar(255),4);
30     imshow("结果图", img_out2);
31     waitKey(0);
32     return 0;
33 }