Opencv learning log 14 - count the number of coins in the picture (regardless of overlap)

Preface

This article mainly describes how to count the number of coins in image processing .

One 、 Code

#include <opencv2/opencv.hpp>
#include <iostream>
using namespace cv;

int main()
{
    
	cv::Mat srcMat = imread("C://Users//john//Desktop//1.jpg", 0);
	cv::Mat resMat;
	cv::Mat res2Mat;
	cv::Mat Matstate;
	cv::Mat center;
	//adaptiveThreshold(srcMat, resMat, 255, ADAPTIVE_THRESH_GAUSSIAN_C, THRESH_BINARY_INV, 15, 10);// Adaptive binarization 
	threshold(srcMat, resMat, 100, 255, THRESH_BINARY);
	connectedComponentsWithStats(resMat, res2Mat, Matstate, center, 8, CV_32S);  // Connected domain markers 

	int line = 0;
	line = Matstate.rows;
	//cv::Mat B = Matstate.rowRange(0, 3).clone(); // extract 0 To 2 That's ok 
		int i;
	int j;
	int coinnum = 0;
	for (i = 0; i < Matstate.rows; i++)
	{
    
		if (Matstate.at<int>(i, 4) >= 1000 && Matstate.at<int>(i, 4) <= 10000)
		{
    
			
			coinnum = coinnum + 1;
			cv::Rect rect;
			rect.x = Matstate.at<int>(i, 0);
			rect.y = Matstate.at<int>(i, 1);
			rect.width = Matstate.at<int>(i, 2);
			rect.height = Matstate.at<int>(i, 3);
			rectangle(resMat, rect, CV_RGB(255, 255, 255), 1, 8, 0);
		}

	}
	std::cout << coinnum << std::endl;
	imshow("resMat", resMat);
	waitKey(0);
}

summary

1. The code can run directly , If you don't understand, please leave a message .