寻找轮廓的中点
主要是回答网友提问，同时回顾主要知识。
#include "stdafx.h"
#include <opencv2/core/utility.hpp>
#include "opencv2/imgproc.hpp"
#include "opencv2/videoio.hpp"
#include "opencv2/highgui.hpp"
#include "GOCVHelper.h"
using namespace cv;
using namespace std;
using namespace GO;
RNG rng12345(12345);
int main()
{
Mat matSrc = imread("e:/sandbox/shapes_and_colors.jpg",0);
GaussianBlur(matSrc,matSrc,Size(5,5),0);
vector<vector<Point> > contours;
vector<Vec4i> hierarchy;
//阈值
threshold(matSrc,matSrc,60,255,THRESH_BINARY);
//寻找轮廓
findContours(matSrc.clone(),contours,hierarchy, RETR_EXTERNAL,CHAIN_APPROX_SIMPLE,Point(0, 0) );
/// 计算矩
vector<Moments> mu(contours.size() );
for( int i = 0; i < contours.size(); i++ )
{ mu[i] = moments( contours[i], false ); }
/// 计算中心矩:
vector<Point2f> mc( contours.size() );
for( int i = 0; i < contours.size(); i++ )
{ mc[i] = Point2f( mu[i].m10/mu[i].m00 , mu[i].m01/mu[i].m00 ); }
/// 绘制轮廓
Mat drawing = Mat::zeros( matSrc.size(), CV_8UC3 );
for( int i = 0; i< contours.size(); i++ )
{
Scalar color = Scalar( rng12345.uniform(0, 255), rng12345.uniform(0,255), rng12345.uniform(0,255) );
drawContours( drawing, contours, i, color, 2, 8, hierarchy, 0, Point() );
circle( drawing, mc[i], 4, color, -1, 8, 0 );
}
waitKey();
return 0;
};
目前方向：图像拼接融合、图像识别 联系方式：jsxyhelu@foxmail.com
