OpenCV
3.4.15
Open Source Computer Vision
|
Template class for 2D rectangles. More...
#include <opencv2/core/types.hpp>
Public Types | |
typedef _Tp | value_type |
Public Member Functions | |
Rect_ () | |
default constructor More... | |
Rect_ (_Tp _x, _Tp _y, _Tp _width, _Tp _height) | |
Rect_ (const Rect_ &r) | |
Rect_ (const Point_< _Tp > &org, const Size_< _Tp > &sz) | |
Rect_ (const Point_< _Tp > &pt1, const Point_< _Tp > &pt2) | |
_Tp | area () const |
area (width*height) of the rectangle More... | |
Point_< _Tp > | br () const |
the bottom-right corner More... | |
bool | contains (const Point_< _Tp > &pt) const |
checks whether the rectangle contains the point More... | |
bool | empty () const |
true if empty More... | |
template<typename _Tp2 > | |
operator Rect_< _Tp2 > () const | |
conversion to another data type More... | |
Rect_ & | operator= (const Rect_ &r) |
Size_< _Tp > | size () const |
size (width, height) of the rectangle More... | |
Point_< _Tp > | tl () const |
the top-left corner More... | |
Public Attributes | |
_Tp | height |
height of the rectangle More... | |
_Tp | width |
width of the rectangle More... | |
_Tp | x |
x coordinate of the top-left corner More... | |
_Tp | y |
y coordinate of the top-left corner More... | |
Template class for 2D rectangles.
described by the following parameters:
OpenCV typically assumes that the top and left boundary of the rectangle are inclusive, while the right and bottom boundaries are not. For example, the method Rect_::contains returns true if
\[x \leq pt.x < x+width, y \leq pt.y < y+height\]
Virtually every loop over an image ROI in OpenCV (where ROI is specified by Rect_<int> ) is implemented as:
In addition to the class members, the following operations on rectangles are implemented:
This is an example how the partial ordering on rectangles can be established (rect1 \(\subseteq\) rect2):
For your convenience, the Rect_<> alias is available: cv::Rect
typedef _Tp cv::Rect_< _Tp >::value_type |
cv::Rect_< _Tp >::Rect_ | ( | const Point_< _Tp > & | org, |
const Size_< _Tp > & | sz | ||
) |
cv::Rect_< _Tp >::Rect_ | ( | const Point_< _Tp > & | pt1, |
const Point_< _Tp > & | pt2 | ||
) |
_Tp cv::Rect_< _Tp >::area | ( | ) | const |
area (width*height) of the rectangle
the bottom-right corner
checks whether the rectangle contains the point
bool cv::Rect_< _Tp >::empty | ( | ) | const |
true if empty
conversion to another data type
size (width, height) of the rectangle
the top-left corner
_Tp cv::Rect_< _Tp >::height |
height of the rectangle
_Tp cv::Rect_< _Tp >::width |
width of the rectangle
_Tp cv::Rect_< _Tp >::x |
x coordinate of the top-left corner
_Tp cv::Rect_< _Tp >::y |
y coordinate of the top-left corner