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#include "stdafx.h"
#include <iostream>

using namespace std;
using namespace cv;

VP FindBigestContour(Mat src){    
    int imax = 0; //代表最大轮廓的序号
    int imaxcontour = -1; //代表最大轮廓的大小
    std::vector<std::vector<cv::Point>>contours;    
    findContours(src,contours,CV_RETR_LIST,CV_CHAIN_APPROX_SIMPLE);
    for (int i=0;i<contours.size();i++){
        int itmp =  contourArea(contours[i]);//这里采用的是轮廓大小
        if (imaxcontour < itmp ){
            imax = i;
            imaxcontour = itmp;
        }
    }
    return contours[imax];
}
int main(int argc, char* argv[])
{
    Mat src = imread("e:/template/cloud.png");
    Mat temp;
    cvtColor(src,temp,COLOR_BGR2GRAY);
    threshold(temp,temp,100,255,THRESH_OTSU);
    imshow("src",temp);
    //寻找最大轮廓
    VP VPResult = FindBigestContour(temp);
    //寻找最大内切圆
    int dist = 0;
    int maxdist = 0;
    Point center;
    for(int i=0;i<src.cols;i++)
    {
        for(int j=0;j<src.rows;j++)
        {
            dist = pointPolygonTest(VPResult,cv::Point(i,j),true);
            if(dist>maxdist)
            {
                maxdist=dist;
                center=cv::Point(i,j);
            }
        }
    }
    //绘制结果
    circle(src,center,maxdist,Scalar(0,0,255));
    imshow("dst",src);
    waitKey();
}

#include "stdafx.h"
#include <iostream>

using namespace std;
using namespace cv;

VP FindBigestContour(Mat src){    
    int imax = 0; //代表最大轮廓的序号
     int imaxcontour = -1; //代表最大轮廓的大小
     std::vector<std::vector<cv::Point>>contours;    
    findContours(src,contours,CV_RETR_LIST,CV_CHAIN_APPROX_SIMPLE);
    for (int i=0;i<contours.size();i++){
        int itmp =  contourArea(contours[i]);//这里采用的是轮廓大小
contourArea(contours[i]);
        if (imaxcontour < itmp ){
            imax = i;
            imaxcontour = itmp;
        }
    }
    return contours[imax];
}
int main(int argc, char* argv[])
{
    Mat src = imread("e:/template/cloud.png");
    Mat temp;
    cvtColor(src,temp,COLOR_BGR2GRAY);
    threshold(temp,temp,100,255,THRESH_OTSU);
    imshow("src",temp);
    //寻找最大轮廓
    VP VPResult = FindBigestContour(temp);
    //寻找最大内切圆
    int dist = 0;
    int maxdist = 0;
    Point center;
    for(int i=0;i<src.cols;i++)
    {
        for(int j=0;j<src.rows;j++)
        {
            dist = pointPolygonTest(VPResult,cv::Point(i,j),true);
            if(dist>maxdist)
            {
                maxdist=dist;
                center=cv::Point(i,j);
            }
        }
    }
    //绘制结果
    circle(src,center,maxdist,Scalar(0,0,255));
    imshow("dst",src);
    waitKey();
}