cv::RotatedRect Class Reference

The class represents rotated (i.e. not up-right) rectangles on a plane. More...

#include <opencv2/core/types.hpp>

Collaboration diagram for cv::RotatedRect:

Public Member Functions
	RotatedRect ()
	default constructor
	RotatedRect (const Point2f &center, const Size2f &size, float angle)
	RotatedRect (const Point2f &point1, const Point2f &point2, const Point2f &point3)
Rect	boundingRect () const
	returns the minimal up-right integer rectangle containing the rotated rectangle
Rect2f	boundingRect2f () const
	returns the minimal (exact) floating point rectangle containing the rotated rectangle, not intended for use with images
void	points (Point2f pts[]) const
void	points (std::vector< Point2f > &pts) const

Public Attributes
float	angle
	returns the rotation angle. When the angle is 0, 90, 180, 270 etc., the rectangle becomes an up-right rectangle.
Point2f	center
	returns the rectangle mass center
Size2f	size
	returns width and height of the rectangle

Detailed Description

The class represents rotated (i.e. not up-right) rectangles on a plane.

Each rectangle is specified by the center point (mass center), length of each side (represented by Size2f structure) and the rotation angle in degrees.

The sample below demonstrates how to use RotatedRect:

    Mat test_image(200, 200, CV_8UC3, Scalar(0));
    RotatedRect rRect = RotatedRect(Point2f(100,100), Size2f(100,50), 30);
 
    Point2f vertices[4];
    rRect.points(vertices);
    for (int i = 0; i < 4; i++)
    {
        line(test_image, vertices[i], vertices[(i+1)%4], Scalar(0,255,0), 2);
        putText(test_image, vertex_names[i], vertices[i], FONT_HERSHEY_SIMPLEX, 1, Scalar(255,255,255));
    }
 
    Rect brect = rRect.boundingRect();
    rectangle(test_image, brect, Scalar(255,0,0), 2);
 
    imshow("rectangles", test_image);
    waitKey(0);

See also

CamShift, fitEllipse, minAreaRect, CvBox2D

Examples

samples/cpp/geometry.cpp, and samples/cpp/snippets/camshiftdemo.cpp.

Constructor & Destructor Documentation

RotatedRect() [1/3]

cv::RotatedRect::RotatedRect

(

)

Python:
	cv.RotatedRect(		) ->	<RotatedRect object>
	cv.RotatedRect(	center, size, angle	) ->	<RotatedRect object>
	cv.RotatedRect(	point1, point2, point3	) ->	<RotatedRect object>

default constructor

RotatedRect() [2/3]

cv::RotatedRect::RotatedRect	(	const Point2f &	center,
		const Size2f &	size,
		float	angle )

Python:
	cv.RotatedRect(		) ->	<RotatedRect object>
	cv.RotatedRect(	center, size, angle	) ->	<RotatedRect object>
	cv.RotatedRect(	point1, point2, point3	) ->	<RotatedRect object>

full constructor

Parameters

center	The rectangle mass center.
size	Width and height of the rectangle.
angle	The rotation angle in a clockwise direction. When the angle is 0, 90, 180, 270 etc., the rectangle becomes an up-right rectangle.

RotatedRect() [3/3]

cv::RotatedRect::RotatedRect	(	const Point2f &	point1,
		const Point2f &	point2,
		const Point2f &	point3 )

Python:
	cv.RotatedRect(		) ->	<RotatedRect object>
	cv.RotatedRect(	center, size, angle	) ->	<RotatedRect object>
	cv.RotatedRect(	point1, point2, point3	) ->	<RotatedRect object>

Any 3 end points of the RotatedRect. They must be given in order (either clockwise or anticlockwise).

Member Function Documentation

boundingRect()

Rect cv::RotatedRect::boundingRect

(

)

const

Python:
	cv.RotatedRect.boundingRect(		) ->	retval

returns the minimal up-right integer rectangle containing the rotated rectangle

boundingRect2f()

Rect2f cv::RotatedRect::boundingRect2f

(

)

const

Python:
	cv.RotatedRect.boundingRect2f(		) ->	retval

returns the minimal (exact) floating point rectangle containing the rotated rectangle, not intended for use with images

points() [1/2]

void cv::RotatedRect::points

(

Point2f

pts[]

)

const

Python:
	cv.RotatedRect.points(		) ->	pts

returns 4 vertices of the rotated rectangle

Parameters

pts	The points array for storing rectangle vertices. The order is bottomLeft, topLeft, topRight, bottomRight.

Note

Bottom, Top, Left and Right sides refer to the original rectangle (angle is 0), so after 180 degree rotation bottomLeft point will be located at the top right corner of the rectangle.

Examples

samples/cpp/geometry.cpp.

points() [2/2]

void cv::RotatedRect::points

(

std::vector< Point2f > &

pts

)

const

Python:
	cv.RotatedRect.points(		) ->	pts

Member Data Documentation

angle

float cv::RotatedRect::angle

returns the rotation angle. When the angle is 0, 90, 180, 270 etc., the rectangle becomes an up-right rectangle.

center

Point2f cv::RotatedRect::center

returns the rectangle mass center

size

Size2f cv::RotatedRect::size

returns width and height of the rectangle

Examples

samples/cpp/geometry.cpp.

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The documentation for this class was generated from the following file:

• opencv2/core/types.hpp