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  • OpenCV学习笔记——点击显示鼠标坐标

    点击显示鼠标显示坐标,再次点击时上一次的坐标的会消失……

    #include<highgui.h>
    #include<cv.h>
    void on_mouse(int event, int x, int y, int flags, void* img)
    {
    	CvFont font;
    	cvInitFont(&font, CV_FONT_HERSHEY_SIMPLEX, 0.5, 0.5, 0, 1, CV_AA);
    	if (event == CV_EVENT_LBUTTONDOWN)
    	{
    		IplImage *timg = cvCloneImage((IplImage *)img);
    		CvPoint pt = cvPoint(x, y);
    		char temp[16];
    		sprintf(temp, "(%d,%d)", x, y);
    		cvPutText(timg, temp, pt, &font, CV_RGB(250,0,0));
    		cvCircle(timg, pt, 2, cvScalar(255, 0, 0, 0), CV_FILLED, CV_AA, 0);
    		cvShowImage("src", timg);
    		cvReleaseImage(&timg);
    	}
    }
    
    int main()
    {
    	IplImage *img = cvLoadImage("timg.jpg", 1);
    	cvNamedWindow("src", 1);
    	cvSetMouseCallback("src", on_mouse,img);
    	cvShowImage("src", img);
    	cvWaitKey(0);
    	cvDestroyAllWindows();
    	cvReleaseImage(&img);
    	return 0;
    }
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  • 原文地址:https://www.cnblogs.com/Blackops/p/5766256.html
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