c_cpp 用鼠标点即获取相应位置坐标

Posted 2021-05-14

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

//点击鼠标返回相应坐标位置并存到point2.txt文件中
#define WINDOW "source image"
Mat src;
void On_mouse(int event, int x, int y, int flags, void*);
Point recent_Point;
ofstream file("point2.txt", ios::out | ios::binary);
int main()
{
	src = imread("abm.jpg");
	namedWindow(WINDOW, WINDOW_NORMAL);
	setMouseCallback(WINDOW, On_mouse);
	//while (1)
	imshow(WINDOW, src);//点击的开始
	waitKey(0);
	file.close();
	return 0;
}
void On_mouse(int event, int x, int y, int flags, void*)//每次点击左键，将将当前点坐标存储到txt文件中，并在相应位置画红点
{
	if (event == EVENT_LBUTTONDOWN)
	{
		recent_Point = Point(x, y);
		file <<"("<< recent_Point.x << "," << recent_Point.y <<")"<< " ";
		circle(src, recent_Point, 3, Scalar(0, 0, 255), -1);
		imshow(WINDOW, src);
	}
}