1 #include 
     
         2 #include
      
          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
       
        
          >::iterator itc = contours.begin();18     while (itc != contours.end())19     {20         if (itc->size()<50)21         {22             itc = contours.erase(itc);23         }24         else25         {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 }