将两个点转换成一个矩形(cv::Rect)

I have two points (assumed to be from rectangle, which are its top-left corner & bottom-right corner).

我有两个点(假设来自矩形，它的左上角和右下角)。

Point pTopLeft;
Point pBottomRight;

I want to formulate a cv::Rect using these points. So, I tried

我想用这些点写出一份简历。所以,我试着

cv::Rect rRect;
rRect.tl() = pTopLeft;
rRect.br() = pBottomRight;

There is no error. But the Rect seems to be containing nothing. i.e., both the points are indicating zero. So, How do I formulate a new Rect object with arbitrary two points ?

没有错误。但Rect似乎什么也没有。即。，两个点都表示0。那么，如何用任意两点表示一个新的Rect对象呢?

3 个解决方案

#1

since Rect::tl() and Rect::br() just return copies, not references, try a constructor:

Rect::tl()和Rect::br()只是返回副本，而不是引用，尝试构造函数:

cv::Rect rRect(pTopLeft, pBottomRight);

#2

You have to calcul basic informations from your two points. Width and height, and then create new object using the following constructor :

你必须从你的两点中找出基本的信息。宽度和高度，然后使用以下构造函数创建新对象:

(Object) rect(x, y, width, height)

pTopLeft.x = x

pTopLeft.y = y

pBottomRight.x - pTopLeft.x = width

pTopLeft.y - pBottomRight.y = height

#3

You can make it this way also,

你也可以这样做，

Point pTopLeft;
Point pBottomRight;
cv::Rect rRect(pTopLeft.x,pTopLeft.y,pBottomRight.x-pTopLeft.x,pBottomRight.y-pTopLeft.y);

#1