Class cv::RotatedRect#

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

#include <opencv2/core/types.hpp>

Collaboration diagram for cv::RotatedRect:

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);

Constructor & Destructor Documentation#

RotatedRect()#

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()#

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()#

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()

Python:

cv.RotatedRect.boundingRect() -> retval

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

boundingRect2f()#

Rect2f cv::RotatedRect::boundingRect2f()

Python:

cv.RotatedRect.boundingRect2f() -> retval

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

points()#

void cv::RotatedRect::points(Point2f[] pts)

Python:

cv.RotatedRect.points() -> pts

returns 4 vertices of the rotated rectangle

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.

Parameters

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

points()#

void cv::RotatedRect::points(std::vector< Point2f > & pts)

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

Source file#

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

opencv2/core/types.hpp