转载自：http://blog.csdn.net/xiaojidan2011/article/details/8105840
简单的点击鼠标可以查找图像的像素值，方法很简单。
- void mouseHandler(int event, int x,int y ,int flags,void *p)
- {
- IplImage *img0, *img1;
- img0=(IplImage*)p;
- img1=cvCloneImage(img0);
- CvFont font;
- uchar *ptr;
- char label[20];
- cvInitFont (&font,CV_FONT_HERSHEY_PLAIN,0.8,0.8,0,1,8);
- if(event==CV_EVENT_LBUTTONDOWN)
- {
- ptr=cvPtr2D(img1, y,x,NULL);
- sprintf(label, "(%d, %d, %d)",ptr[0], ptr[1], ptr[2]);
- cvRectangle(img1, cvPoint(x,y-12),cvPoint(x+100, y+4),
- CV_RGB(255,0,0),CV_FILLED, 8,0);
- cvPutText(img1,label,cvPoint(x,y),&font,CV_RGB(255,255,255) );
- cvShowImage("src",img1);
- }
- }
- int main()
- {
- IplImage *src;
- src=cvLoadImage("e://kankan//fish.jpg");
- assert(src);
- cvNamedWindow("src", 1);
- cvSetMouseCallback("src", mouseHandler, (void*)src);
- mouseHandler(0,0,0,0,src);
- cvShowImage("src",src);
- cvWaitKey(0);
- return 0;
- }
void mouseHandler(int event, int x,int y ,int flags,void *p)
{
IplImage *img0, *img1;
img0=(IplImage*)p;
img1=cvCloneImage(img0);
CvFont font;
uchar *ptr;
char label[20];
cvInitFont (&font,CV_FONT_HERSHEY_PLAIN,0.8,0.8,0,1,8);
if(event==CV_EVENT_LBUTTONDOWN)
{
ptr=cvPtr2D(img1, y,x,NULL);
sprintf(label, "(%d, %d, %d)",ptr[0], ptr[1], ptr[2]);
cvRectangle(img1, cvPoint(x,y-12),cvPoint(x+100, y+4),
CV_RGB(255,0,0),CV_FILLED, 8,0);
cvPutText(img1,label,cvPoint(x,y),&font,CV_RGB(255,255,255) );
cvShowImage("src",img1);
}
}
int main()
{
IplImage *src;
src=cvLoadImage("e://kankan//fish.jpg");
assert(src);
cvNamedWindow("src", 1);
cvSetMouseCallback("src", mouseHandler, (void*)src);
mouseHandler(0,0,0,0,src);
cvShowImage("src",src);
cvWaitKey(0);
return 0;
}
Result:
简单的点击鼠标可以查找图像的像素值，方法很简单。
- void mouseHandler(int event, int x,int y ,int flags,void *p)
- {
- IplImage *img0, *img1;
- img0=(IplImage*)p;
- img1=cvCloneImage(img0);
- CvFont font;
- uchar *ptr;
- char label[20];
- cvInitFont (&font,CV_FONT_HERSHEY_PLAIN,0.8,0.8,0,1,8);
- if(event==CV_EVENT_LBUTTONDOWN)
- {
- ptr=cvPtr2D(img1, y,x,NULL);
- sprintf(label, "(%d, %d, %d)",ptr[0], ptr[1], ptr[2]);
- cvRectangle(img1, cvPoint(x,y-12),cvPoint(x+100, y+4),
- CV_RGB(255,0,0),CV_FILLED, 8,0);
- cvPutText(img1,label,cvPoint(x,y),&font,CV_RGB(255,255,255) );
- cvShowImage("src",img1);
- }
- }
- int main()
- {
- IplImage *src;
- src=cvLoadImage("e://kankan//fish.jpg");
- assert(src);
- cvNamedWindow("src", 1);
- cvSetMouseCallback("src", mouseHandler, (void*)src);
- mouseHandler(0,0,0,0,src);
- cvShowImage("src",src);
- cvWaitKey(0);
- return 0;
- }
void mouseHandler(int event, int x,int y ,int flags,void *p)
{
IplImage *img0, *img1;
img0=(IplImage*)p;
img1=cvCloneImage(img0);
CvFont font;
uchar *ptr;
char label[20];
cvInitFont (&font,CV_FONT_HERSHEY_PLAIN,0.8,0.8,0,1,8);
if(event==CV_EVENT_LBUTTONDOWN)
{
ptr=cvPtr2D(img1, y,x,NULL);
sprintf(label, "(%d, %d, %d)",ptr[0], ptr[1], ptr[2]);
cvRectangle(img1, cvPoint(x,y-12),cvPoint(x+100, y+4),
CV_RGB(255,0,0),CV_FILLED, 8,0);
cvPutText(img1,label,cvPoint(x,y),&font,CV_RGB(255,255,255) );
cvShowImage("src",img1);
}
}
int main()
{
IplImage *src;
src=cvLoadImage("e://kankan//fish.jpg");
assert(src);
cvNamedWindow("src", 1);
cvSetMouseCallback("src", mouseHandler, (void*)src);
mouseHandler(0,0,0,0,src);
cvShowImage("src",src);
cvWaitKey(0);
return 0;
}
Result: