将两个点转换为矩形（cv :: Rect） [英] Convert two points to a rectangle (cv::Rect)

问题描述

我有两个点（假设是从矩形，它是左上角和右下角）。

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

Point pTopLeft;
Point pBottomRight;

我想使用这些点来制定一个cv :: Rect。所以，我尝试了

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

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

没有错误。但 Rect 似乎不包含任何内容。即，两个点都指示零。所以，我如何制定一个新的Rect对象与任意两点？

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 ?

推荐答案

：br（）只是返回副本，而不是引用，尝试一个构造函数：

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

cv::Rect rRect(pTopLeft, pBottomRight);

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