使用C ++ opencv在黑白图像中查找对象的中心点 [英] Find the center point of an object in a black-white image using C++ opencv

问题描述

我有下面的图片。我的目标是找到对象中心点的x，y值。我试过中，您可以在这里找到图像的中心：

  ///获取质量中心：
 vector< Point2f> mc（contours.size（））; 
 for（int i = 0; i< contours.size（）; i ++）
 {mc [i] = Point2f（mu [i] .m10 / mu [i] .m00，mu [我] .m01 / mu [i] .m00）; } 
  

你可以找到你的图像中心：

  #includeopencv2 \ openncv.hpp
 using namespace cv; 
 
 int main（）
 {
 Mat1b gray = imread（path_to_image，IMREAD_GRAYSCALE）; 
 
时刻mu =时刻（灰色，真实）; 
点中心; 
 center.x = mu.m10 / mu.m00; 
 center.y = mu.m01 / mu.m00; 
 
 Mat3b res; 
 cvtColor（gray，res，CV_GRAY2BGR）; 
 
 circle（res，center，2，Scalar（0,0,255））; 
 
 imshow（结果，res）; 
 waitKey（）; 
 
返回0; 
} 
  

结果图片是：

I have the image below. My aim is to find x,y values of the center point of the object. I tried Image moments but I couldn't find any x,y values. How can I do that?

The center point shoud be the red point or something close to it.

解决方案

In the link you posted, you can find the center of the image here:

///  Get the mass centers:
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 ); }

You can find the center of your image like this:

#include "opencv2\opencv.hpp"
using namespace cv;

int main()
{
    Mat1b gray = imread("path_to_image", IMREAD_GRAYSCALE);

    Moments mu = moments(gray, true);
    Point center;
    center.x = mu.m10 / mu.m00;
    center.y = mu.m01 / mu.m00;

    Mat3b res;
    cvtColor(gray, res, CV_GRAY2BGR);

    circle(res, center, 2, Scalar(0,0,255));

    imshow("Result", res);
    waitKey();

    return 0;
}

The resulting image is:

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