OpenCV--求取图像多轮廓质心，并于图像上绘制显示质心及其坐标

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/zhuoyueljl/article/details/53588271

1、源代码

  
  
#include "stdafx.h"
#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv/cv.hpp>
#include <opencv2/highgui/highgui.hpp>

using namespace cv;
using namespace std;
Mat src;
Mat src_gray;
int thresh = 30;
int max_thresh = 255;

int main()
{
src = imread( "C:\\Users\\Lijunliang\\Desktop\\opencvpic\\2\\22.png" ,CV_LOAD_IMAGE_COLOR ); //注意路径得换成自己的
cvtColor( src, src_gray, CV_BGR2GRAY );//灰度化
GaussianBlur( src, src, Size(3,3), 0.1, 0, BORDER_DEFAULT );
blur( src_gray, src_gray, Size(3,3) ); //滤波
namedWindow( "image", CV_WINDOW_AUTOSIZE );
imshow( "image", src );
moveWindow("image",20,20);
//定义Canny边缘检测图像
Mat canny_output;
vector <vector<Point> > contours;
vector <Vec4i> hierarchy;
//利用canny算法检测边缘
Canny( src_gray, canny_output, thresh, thresh*3, 3 );
namedWindow( "canny", CV_WINDOW_AUTOSIZE );
imshow( "canny", canny_output );
moveWindow("canny",550,20);
//查找轮廓
findContours( canny_output, contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, Point(0, 0) );
//计算轮廓矩
vector <Moments> mu(contours.size() );
for( int i = 0; i < contours.size(); i++ )
{
mu[i] = moments( contours[i], false );
}
//计算轮廓的质心
vector<Point2f> mc( contours.size() );
for( int i = 0; i < contours.size(); i++ )
{
mc[i] = Point2d( mu[i].m10/mu[i].m00 , mu[i].m01/mu[i].m00 );
}
//画轮廓及其质心并显示
Mat drawing = Mat::zeros( canny_output.size(), CV_8UC3 );
for( int i = 0; i< contours.size(); i++ )
{
Scalar color = Scalar( 255, 0, 0);
drawContours( drawing, contours, i, color, 2, 8, hierarchy, 0, Point() );
circle( drawing, mc[i], 5, Scalar( 0, 0, 255), -1, 8, 0 );
rectangle(drawing, boundingRect(contours.at(i)), cvScalar(0,255,0));
char tam[100];
sprintf(tam, "(%0.0f,%0.0f)",mc[i].x,mc[i].y);
putText(drawing, tam, Point(mc[i].x, mc[i].y), FONT_HERSHEY_SIMPLEX, 0.4, cvScalar(255,0,255),1);
}
namedWindow( "Contours", CV_WINDOW_AUTOSIZE );
imshow( "Contours", drawing );
moveWindow("Contours",1100,20);
waitKey(0);
src.release();
src_gray.release();
return 0;
}
  
  

2、获取实验结果

转载自：https://blog.csdn.net/zhuoyueljl/article/details/53588271

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/zhuoyueljl/article/details/53588271