参考资料：
链接：https://blog.csdn.net/jiakeyouwe/article/details/52075922
https://blog.csdn.net/bisheng250/article/details/53840682
最近遇到读取图像像素坐标点问题，查阅了相关问题的资料后发现，大部分都是基于opencv2.0以下的程序。所以打算通过借鉴大佬们的程序，写一个基于opencv3的程序,先完成初步的效果，后面再改进。
直接上程序:
#include<opencv2/opencv.hpp>
#include<math.h>
#include<iostream>
void Myshowpoint( int event, int x, int y, int flags,void*);
using namespace cv;
Mat image, dst;
void Myshowpoint(int event, int x, int y, int flags, void* param)
{
static Point pre_pt = { -1,-1 };
static Point cur_pt = { -1,-1 };
CvFont font;
uchar*ptr;
char temp[20];
cvInitFont(&font, CV_FONT_HERSHEY_PLAIN, 1, 1, 0, 1, 1);
//鼠标事件
if (event == CV_EVENT_LBUTTONDOWN)
{
image.copyTo(dst);
//cvCopy(pSrcImg,pImg,NULL); //代替 pImg = cvCloneImage(pSrcImg);
sprintf(temp, "(%d,%d)", x, y);
pre_pt = Point(x, y);
//显示
putText(image, temp, Point(x, y), FONT_HERSHEY_PLAIN, 0.5, Scalar(255, 255, 255));
//选中的点绘制圆
circle(image, pre_pt, 2, Scalar(0, 255, 0), 1, 8, 0);
imshow("image", image);
image.copyTo(dst);
}
}
int main()
{
//Mat src;
image = imread("a.jpg",0);
if (!image.data)
{
printf("can not find image file..\n");
return -1;
}
namedWindow("src", WINDOW_AUTOSIZE);
setMouseCallback("src", Myshowpoint, 0);
imshow("src", image);
waitKey(0);
return 0;
}
效果图：
读取像素坐标
