openCV 는 마우스 로 창 에 사각형 을 그립 니 다.
1517 단어 openCV
// chapter.cpp : 。
//
#include "stdafx.h"
#include "highgui.h"
void my_mouse_callback(int event,int x,int y,int flags,void *param);
CvRect box;
bool drawing_box=false;
void draw_box(IplImage *img,CvRect rect){
cvRectangle(img,cvPoint(box.x,box.y),cvPoint(box.x+box.width,box.y+box.height),cvScalar(0,0,255));
}
int _tmain(int argc, _TCHAR* argv[])
{
box=cvRect(-1,-1,0,0);// box
IplImage *image=cvCreateImage(cvSize(200,200),IPL_DEPTH_8U,3);
cvZero(image);
IplImage * temp=cvCloneImage(image);
cvNamedWindow("Box",0);
cvSetMouseCallback("Box",my_mouse_callback,(void *)image);// openCV
while(1){
cvCopy(image,temp);
if(drawing_box) draw_box(temp,box);
cvShowImage("Box",temp);
if(cvWaitKey(15)==27) break;
}
cvReleaseImage(&image);
cvReleaseImage(&temp);
cvDestroyWindow("Box");
return 0;
}
void my_mouse_callback(int event,int x,int y,int flags,void *param){
IplImage *image=(IplImage *)param;
switch(event){
case CV_EVENT_MOUSEMOVE:{
if(drawing_box){
box.width=x-box.x;
box.height=y-box.y;
}
}
break;
case CV_EVENT_LBUTTONDOWN:{
drawing_box=true;
box=cvRect(x,y,0,0);
}
break;
case CV_EVENT_LBUTTONUP:{
drawing_box=false;
if(box.width<0){
box.x+=box.width;
box.width*=-1;
}
if(box.height<0){
box.y+=box.height;
box.height*=-1;
}
draw_box(image,box);
}
break;
}
}