OpenCV入門:ROI関心領域(マウスイベント選択領域)
3075 ワード
OpenCV入門:ROI関心領域(マウスイベント選択領域)
ブログhttp://blog.csdn.net/qq_23968185/article/details/51335291
効果図:
ブログhttp://blog.csdn.net/qq_23968185/article/details/51335291
#include
#include "opencv2/core/core.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
using namespace std;
using namespace cv;
bool draw;
Mat src;//
Mat roi;//ROI
Point cursor;//
Rect rect;// ROI
/*
void onMouse(int event, int x, int y, int flags, void *param);
, , opencv ,event 10 , 0-9 :
EVENT_MOUSEMOVE =0, //
EVENT_LBUTTONDOWN =1, //
EVENT_RBUTTONDOWN =2, //
EVENT_MBUTTONDOWN =3, //
EVENT_LBUTTONUP =4, //
EVENT_RBUTTONUP =5, //
EVENT_MBUTTONUP =6, //
EVENT_LBUTTONDBLCLK =7, //
EVENT_RBUTTONDBLCLK =8, //
EVENT_MBUTTONDBLCLK =9 //
, (x,y) , , x , y ;
, , , 32 , 。
, 。
*/
void onMouse(int event, int x, int y, int flags, void *param)
{
Mat img = src.clone();
switch (event)
{
//
case CV_EVENT_LBUTTONDOWN:
// , ROI
cvDestroyWindow("ROI");
//
cursor = Point(x, y);
//
rect = Rect(x, y, 0, 0);
draw = true;
break;
//
case CV_EVENT_LBUTTONUP:
if (rect.height > 0 && rect.width > 0)
{
// img roi, SignROI
roi = img(Rect(rect.x, rect.y, rect.width, rect.height));
rectangle(img, rect, Scalar(0, 0, 255), 2);
namedWindow("SignROI");
imshow("SignROI", img);
//
src.copyTo(img);
imshow("SrcImage", img);
// ROI
namedWindow("ROI");
imshow("ROI", roi);
waitKey(0);
}
draw = false;
break;
//
case CV_EVENT_MOUSEMOVE:
if (draw)
{
// MIN , ,
rect.x = MIN(x, cursor.x);
rect.y = MIN(y, cursor.y);
rect.width = abs(cursor.x - x);
rect.height = abs(cursor.y - y);
//
rect &= Rect(0, 0, src.cols, src.rows);
}
break;
}
}
int main()
{
src = imread("C:\\Users\\Phajaan\\Desktop\\bylw\\opencv\\ .jpg");
if (src.data == 0)
{
cout << " " << endl;
return -1;
}
namedWindow("SrcImage");
imshow("SrcImage", src);
/*
void setMouseCallback(const string& winname, MouseCallback onMouse, void* userdata=0 );
Parameters:
,windows , winname ;
, , , , , , ;
, ID, , 0 。
*/
setMouseCallback("SrcImage", onMouse, NULL);
waitKey();
return 0;
}
効果図: