工具——通过鼠标点击获取图像坐标

//窗口坐标监听

cvSetMouseCallback( "output", on_mouse, 0 ); 

//鼠标监听函数

void on_mouse( int event, int x, int y, int flags, void* ustc)  {      CvFont font;      cvInitFont(&font, CV_FONT_HERSHEY_SIMPLEX, 0.5, 0.5, 0, 1, CV_AA);                if( event == CV_EVENT_LBUTTONDOWN )      {          CvPoint pt = cvPoint(x,y);          char temp[16];          sprintf(temp,"(%d,%d)",pt.x,pt.y);  cout<<temp<<endl;    }   }