I have two points (assumed to be from a rectangle and are its top-left corner & bottom-right corner).
Point pTopLeft;
Point pBottomRight;
I want to formulate a cv::Rect
using these points. So, I tried
cv::Rect rRect;
rRect.tl() = pTopLeft;
rRect.br() = pBottomRight;
There is no error. But the Rect
seems to be containing nothing. ie, both the points are indicating zero. So, How do I formulate a new Rect
object with arbitrary two points?
由于Rect::tl()
和Rect::br()
只返回副本,而不是引用,请尝试构造函数:
cv::Rect rRect(pTopLeft, pBottomRight);
You have to calculate basic information from your two points: width and height. Then, create a new object using the following constructor :
(Object) rect(x, y, width, height)
pTopLeft.x = x
pTopLeft.y = y
pBottomRight.x - pTopLeft.x = width
pTopLeft.y - pBottomRight.y = height
You can make it this way also,
Point pTopLeft;
Point pBottomRight;
cv::Rect rRect(pTopLeft.x,pTopLeft.y,pBottomRight.x-pTopLeft.x,pBottomRight.y-pTopLeft.y);
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.