本文共 1351 字，大约阅读时间需要 4 分钟。

#include "cv.h"#include "highgui.h"#include 
   
    #pragma comment(lib,"cv.lib")#pragma comment(lib,"highgui.lib")#pragma comment(lib,"cxcore.lib")void my_mouse_callback(int event, int x, int y, int flags, void* param);void putText(IplImage* image, CvPoint point);//int x_mouse; //int y_mouse;CvPoint point;int main(int argc, char** argv){	IplImage* image = cvLoadImage("1.bmp");	cvNamedWindow("textshow",CV_WINDOW_AUTOSIZE);   	cvSetMouseCallback("textshow",my_mouse_callback,(void*)image);		cvShowImage("textshow",image);	cvWaitKey(0);	return 1;}void my_mouse_callback(int event, int x, int y, int flags, void* param){	IplImage* img = (IplImage*)param;	switch (event)	{	case CV_EVENT_LBUTTONDOWN:		//CvFont font = cvFont(10,5);		//cvInitFont(font,CV_FONT_HERSHEY_SIMPLEX,1,1,0);		point.x = x;		point.y = y;		putText(img,point);		break;	default:		break;	}}void putText(IplImage* image, CvPoint point){	/*这句话不能放在main函数里，因为在鼠标没有点击的时候，不会执行回调函数，所以此时point是没有值的。若放在main函数里，会显示非法访问内存	*/	uchar* ptr = (uchar*)image->imageData+ point.y*image->widthStep + point.x*image->nChannels;		//return 0;			char color[100] ;		int s = sprintf(color, "%d,%d,%d",*ptr,*(ptr+1),*(ptr+2));    printf("%d\n",s);	    CvFont font = cvFont(10,1);	cvInitFont(&font,CV_FONT_HERSHEY_SIMPLEX,1,1,0);	cvPutText(image,color,point,&font,cvScalar(0,0,0));	cvShowImage("textshow",image);}
   

转载地址：https://blog.csdn.net/LJH0600301217/article/details/8650413 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！