opencv提取轮廓大于某个阈值的图像

#include "stdafx.h"
#include "cv.h"
#include "highgui.h"
#include "stdio.h"
#include"core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/core/core.hpp"
#include "opencv2/imgproc/imgproc.hpp"
 
 
#include 
 
 
using namespace cv;
using namespace std;
int main(int argc, char** argv)
{
 
const char* inputImage = "d:/3.jpg"; 
 Mat img; 
 int threshval =100; 
 img = imread(inputImage,0); 
 if (img.empty()) 
 { 
 cout << "Could not read input image file: " << inputImage << endl; 
 return -1; 
 } 
  
 img = img >110; 
 namedWindow("Img", 1); 
 imshow("Img", img); 
 vector > contours; 
 vectorhierarchy; 
 
 vector contour;
 Mat dst = Mat::zeros(img.rows, img.cols, CV_8UC3); 
 findContours(img, contours,hierarchy, CV_RETR_CCOMP, CV_CHAIN_APPROX_SIMPLE); 
 
 int m=contours.size();//得到轮廓的数量
 int n=0;
 for (int i =0;i10)//只画出轮廓大于10的点
 {
 Scalar color( (rand()&255), (rand()&255), (rand()&255) ); 
 
  drawContours( dst, contours, i, color, 1, 8, hierarchy ); 
 }
 contour.clear();
 
 }
 
 namedWindow("src", 1); 
 imshow( "src", dst ); 
 
  waitKey();
  return 0;
}