#include?
#include???
#include
using?namespace?std;??
#pragma?comment（linker?“/subsystem:\“windows\“?/entry:\“mainCRTStartup\““）??
const?char?*pstrWindowsMouseDrawtitle?=?“鼠標繪圖“;??
//?鼠標消息的回調函數??
void?on_mouse（int?event?int?x?int?y?int?flags?void*?param）??
{??
????static?bool?s_bMouseLButtonDown?=?false;??
????static?CvPoint?s_cvPrePoint?=?cvPoint（0?0）;??
??
????switch?（event）??
????{??
????case?CV_EVENT_LBUTTONDOWN:??
????????s_bMouseLButtonDown?=?true;??
????????s_cvPrePoint?=?cvPoint（x?y）;??
????????break;??
??
????case??CV_EVENT_LBUTTONUP:??
????????s_bMouseLButtonDown?=?false;??
????????break;??
??
????case?CV_EVENT_MOUSEMOVE:??
????????if?（s_bMouseLButtonDown）??
????????{??
????????????CvPoint?cvCurrPoint?=?cvPoint（x?y）;??
????????????cvLine（（IplImage*）param?s_cvPrePoint?cvCurrPoint?CV_RGB（0?0?20）?3）;??
????????????s_cvPrePoint?=?cvCurrPoint;??
????????????cvShowImage（pstrWindowsMouseDrawtitle?（IplImage*）param）;??
????????}??
????????break;?