opencv鼠标获取坐标
代码一：点击时显示坐标，鼠标移动时不显示。
代码五，上面的代码不能撤销选定的坐标，下面的代码对此进行了改进，右击撤销最近选择的点，并用互补的颜色表示选择的点和撤销选定的点。除此之外还将选择的坐标输出到文件。在点的坐标前还有一个数表示点的选定次序。
#include
#include
#include
#pragma comment(lib, "cv.lib")
#pragma comment(lib, "cxcore.lib")
#pragma comment(lib, "highgui.lib")
IplImage* src=0;
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);
cvPutText(src,temp, pt, &font, cvScalar(255, 255, 255, 0));
cvCircle( src, pt, 2,cvScalar(255,0,0,0) ,CV_FILLED, CV_AA, 0 );
cvShowImage( "src", src );
}
}
int main()
{
src=cvLoadImage("lena.jpg",1);
cvNamedWindow("src",1);
cvSetMouseCallback( "src", on_mouse, 0 );
cvShowImage("src",src);
cvWaitKey(0);
cvDestroyAllWindows();
cvReleaseImage(&src);
return 0;
}
代码二：鼠标移动时显示坐标，点击时不显示坐标
#include
#include
#include
#pragma comment(lib, "cv.lib")
#pragma comment(lib, "cxcore.lib")
#pragma comment(lib, "highgui.lib")
IplImage* src=0;
IplImage* dst=0;
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_MOUSEMOVE )
{
cvCopy(dst,src);
CvPoint pt = cvPoint(x,y);
char temp[16];
sprintf(temp,"(%d,%d)",pt.x,pt.y);
cvPutText(src,temp, pt, &font, cvScalar(255, 255, 255, 0));
cvCircle( src, pt, 2,cvScalar(255,0,0,0) ,CV_FILLED, CV_AA, 0 );
cvShowImage( "src", src );
}
}
int main()
{
src=cvLoadImage("lena.jpg",1);
dst=cvCloneImage(src);
cvNamedWindow("src",1);
cvSetMouseCallback( "src", on_mouse, 0 );
cvShowImage("src",src);
cvWaitKey(0);
cvDestroyAllWindows();
cvReleaseImage(&src);
cvReleaseImage(&dst);
return 0;
}
#include
#include
#include
#pragma comment(lib, "cv.lib")
#pragma comment(lib, "cxcore.lib")
#pragma comment(lib, "highgui.lib")
IplImage* src=0;
IplImage* dst=0;
void on_mouse( int event, int x, int y, int flags, void* ustc)
{
char temp[16];
CvPoint pt;
CvFont font;
cvInitFont(&font, CV_FONT_HERSHEY_SIMPLEX, 0.5, 0.5, 0, 1, CV_AA);
if( event == CV_EVENT_MOUSEMOVE )
{
cvCopy(dst,src);
sprintf(temp,"(%d,%d)",x,y);
pt = cvPoint(x,y);
cvPutText(src,temp, pt, &font, cvScalar(255, 255, 255, 0));
cvCircle( src, pt, 2,cvScalar(255,0,0,0) ,CV_FILLED, CV_AA, 0 );
cvShowImage( "src", src );
}
else if( event == CV_EVENT_LBUTTONDOWN )
{
//cvCopy(dst,src);
sprintf(temp,"(%d,%d)",x,y);
pt = cvPoint(x,y);
cvPutText(src,temp, pt, &font, cvScalar(255, 255, 255, 0));
cvCircle( src, pt, 2,cvScalar(255,0,0,0) ,CV_FILLED, CV_AA, 0 );
cvCopy(src,dst);
cvShowImage( "src", src );
}
}
int main()
{
src=cvLoadImage("lena.jpg",1);
dst=cvCloneImage(src);
cvNamedWindow("src",1);
cvSetMouseCallback( "src", on_mouse, 0 );
cvShowImage("src",src);
cvWaitKey(0);
cvDestroyAllWindows();
cvReleaseImage(&src);
cvReleaseImage(&dst);
return 0;
}
#include
#include
#include
#pragma comment(lib, "cv.lib")
#pragma comment(lib, "cxcore.lib")
#pragma comment(lib, "highgui.lib")
#define max(a,b) (((a) > (b)) ? (a) : (b))
#define min(a,b) (((a) < (b)) ? (a) : (b))
//注意参数是有符号短整型，该函数的作用是使i限定为[a,b]区间内
int bound(short i,short a,short b)
{
return min(max(i,min(a,b)),max(a,b));
}
IplImage* src=0;
IplImage* dst=0;
void on_mouse( int event, int x, int y, int flags, void* ustc)
{
char temp[16];
CvPoint pt;
CvFont font;
cvInitFont(&font, CV_FONT_HERSHEY_SIMPLEX, 0.5, 0.5, 0, 1, CV_AA);
CvPoint tmp_pt = {-1,-1};
CvSize text_size;
int baseline;
if( event == CV_EVENT_MOUSEMOVE )
{
cvCopy(dst,src);
x=bound(x,0,src->width-1);
y=bound(y,0,src->height-1);
pt = cvPoint(x,y);
cvCircle( src, pt, 2,cvScalar(255,0,0,0) ,CV_FILLED, CV_AA, 0 );
sprintf(temp,"(%d,%d)",x,y);
cvGetTextSize(temp,&font,&text_size,&baseline);
tmp_pt.x = bound(pt.x,0,src->width-text_size.width);
tmp_pt.y = bound(pt.y,text_size.height+baseline,src->height-1-baseline);
cvPutText(src,temp, tmp_pt, &font, cvScalar(255, 255, 255, 0));
cvShowImage( "src", src );
}
else if( event == CV_EVENT_LBUTTONDOWN )
{
//cvCopy(dst,src);
pt = cvPoint(x,y);
cvCircle( src, pt, 2,cvScalar(255,0,0,0) ,CV_FILLED, CV_AA, 0 );
sprintf(temp,"(%d,%d)",x,y);
cvGetTextSize(temp,&font,&text_size,&baseline);
tmp_pt.x = bound(pt.x,0,src->width-text_size.width);
tmp_pt.y = bound(pt.y,text_size.height+baseline,src->height-1-baseline);
cvPutText(src,temp, tmp_pt, &font, cvScalar(255, 255, 255, 0));
cvCopy(src,dst);
cvShowImage( "src", src );
}
}
int main()
{
src=cvLoadImage("lena.jpg",1);
dst=cvCloneImage(src);
cvNamedWindow("src",1);
cvSetMouseCallback( "src", on_mouse, 0 );
cvShowImage("src",src);
cvWaitKey(0);
cvDestroyAllWindows();
cvReleaseImage(&src);
cvReleaseImage(&dst);
return 0;
} 代码五，上面的代码不能撤销选定的坐标，下面的代码对此进行了改进，右击撤销最近选择的点，并用互补的颜色表示选择的点和撤销选定的点。除此之外还将选择的坐标输出到文件。在点的坐标前还有一个数表示点的选定次序。
#include
#include
#include
#include
#include
#include
using namespace std;
#pragma comment(lib, "cv.lib")
#pragma comment(lib, "cxcore.lib")
#pragma comment(lib, "highgui.lib")
#define max(a,b) (((a) > (b)) ? (a) : (b))
#define min(a,b) (((a) < (b)) ? (a) : (b))
//注意参数是有符号短整型，该函数的作用是使i限定为[a,b]区间内
int bound(short i,short a,short b)
{
return min(max(i,min(a,b)),max(a,b));
}
CvScalar getInverseColor(CvScalar c)
{
CvScalar s;
for(int i=0;i<=2;++i)
{
s.val[i]=255-c.val[i];
}
return s;
}
IplImage* src=0;
IplImage* dst=0;
int n=0;
vector points;
void on_mouse( int event, int x, int y, int flags, void* ustc)
{
CvPoint pt;
CvPoint tmp_pt = {-1,-1};
CvFont font;
cvInitFont(&font, CV_FONT_HERSHEY_SIMPLEX, 0.4, 0.4, 0, 1, CV_AA);
char temp[16];
CvSize text_size;
int baseline;
CvScalar clrPoint=cvScalar(255,0,0,0);
CvScalar clrText=cvScalar(255, 255, 255, 0);
if( event == CV_EVENT_MOUSEMOVE )
{
cvCopy(dst,src);
x=bound(x,0,src->width-1);
y=bound(y,0,src->height-1);
pt = cvPoint(x,y);
cvCircle( src, pt, 2,clrPoint ,CV_FILLED, CV_AA, 0 );
sprintf(temp,"%d (%d,%d)",n+1,x,y);
cvGetTextSize(temp,&font,&text_size,&baseline);
tmp_pt.x = bound(pt.x,0,src->width-text_size.width);
tmp_pt.y = bound(pt.y,text_size.height+baseline,src->height-1-baseline);
cvPutText(src,temp, tmp_pt, &font, clrText);
cvShowImage( "src", src );
}
else if( event == CV_EVENT_LBUTTONDOWN)
{
pt = cvPoint(x,y);
points.push_back(pt); n++;
cvCircle( src, pt, 2, clrPoint ,CV_FILLED, CV_AA, 0 );
sprintf(temp,"%d (%d,%d)",n,x,y);
cvGetTextSize(temp,&font,&text_size,&baseline);
tmp_pt.x = bound(pt.x,0,src->width-text_size.width);
tmp_pt.y = bound(pt.y,text_size.height+baseline,src->height-1-baseline);
cvPutText(src,temp, tmp_pt, &font, clrText);
cvCopy(src,dst);
cvShowImage( "src", src );
}
else if( event == CV_EVENT_RBUTTONDOWN )
{
if(!points.empty())
{
cvCopy(dst,src);
pt=points.back();
points.pop_back();
cvCircle( src, pt, 2, getInverseColor(clrPoint),CV_FILLED, CV_AA, 0 );
sprintf(temp,"%d (%d,%d)",n,pt.x,pt.y); --n;
cvGetTextSize(temp,&font,&text_size,&baseline);
tmp_pt.x = bound(pt.x,0,src->width-text_size.width);
tmp_pt.y = bound(pt.y,text_size.height+baseline,src->height-1-baseline);
cvPutText(src,temp, tmp_pt, &font, getInverseColor(clrText));
cvCopy(src,dst);
cvShowImage( "src", src );
}
}
}
int main()
{
src=cvLoadImage("lena.jpg",1);
dst=cvCloneImage(src);
cvNamedWindow("src",1);
cvSetMouseCallback( "src", on_mouse, 0 );
cvShowImage("src",src);
cvWaitKey(0);
cvDestroyAllWindows();
cvReleaseImage(&src);
cvReleaseImage(&dst);
ofstream file("sample.txt");
if(!file)
{
std::cout << "open file error!";
return 1;
}
vector::iterator it=points.begin();
for(;it!=points.end();++it)
{
file<< it->x<<','<y<