【OpenCV】Rect函數

Rect函數

• 功能介紹
• 代碼
• 效果展示

功能介紹

Rect(int x, int y, int width, int height);

• 參數1：x，矩形左上角x的坐标；
• 參數2：y，矩形左上角y的坐标；
• 參數3：width，矩形的寬；
• 參數4：height，矩形的高。

代碼

Mat image = imread("./lena.jpg");
Rect rect1(256, 256, 128, 128);
Rect rect2(224, 224, 128, 128);
 
Mat roi1;
image(rect1).copyTo(roi1); // copy the region rect1 from the image to roi1
imshow("1", roi1);
waitKey(0);
 
Mat roi2;
image(rect2).copyTo(roi2); // copy the region rect2 from the image to roi2
imshow("2", roi2);
waitKey(0);
 
cv::Rect rect3 = rect1&rect2; // intersection of the two sets
Mat roi3;
image(rect3).copyTo(roi3);
imshow("3", roi3);
waitKey(0);
 
Rect rect4 = rect1|rect2; // union of the two sets (the minimum bounding rectangle)
Mat roi4;
image(rect4).copyTo(roi4);
imshow("4", roi4);
waitKey(0);
 
Rect rect5(10, 10, 128, 128);
roi1.copyTo(image(rect5)); // copy the region rect1 to the designated region in the image
imshow("5", image);
waitKey(0);
           

效果展示