Core utilities for image and math operations using OpenCV. More...

#include <opencv2/core/mat.hpp>

Include dependency graph for CvUtils.h:

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Functions
void	core::image::resizeRect (cv::Rect &rect, double scaleFactor)
	Resizes a rectangle by a given scale factor. More...

void	core::image::createQuadraticRect (cv::Rect &r, const cv::Rect &imageRect)
	Creates a quadratic rectangle based on an existing rectangle. More...

void	core::image::histogramEqualization (cv::Mat &frame)
	Performs histogram equalization on a given frame. More...

void	core::math::eulerAnglesFromRotationVector (const cv::Mat &rotationVector, cv::Vec3d &eulerAngles)
	Calculates Euler angles from a rotation vector. More...

cv::Mat	core::math::eulerAnglesToRotationMatrix (const cv::Vec3f &theta)
	Converts Euler angles to a rotation matrix. More...

cv::Point3d	core::math::rotatePoint (const cv::Point3d &point, const cv::Mat &rotationmatrix)
	Rotates a point using a given rotation matrix. More...

cv::Point	core::math::perspectiveTransformPoint (const cv::Point2f &pt, cv::Mat &transformation)
	Performs perspective transformation on a point. More...

cv::Point2d	core::math::findProjectedPoint (const cv::Mat &rotation_matrix, const cv::Mat &translation_vector, const cv::Mat camera_matrix, cv::Point3d model_point)
	Finds the projected point using rotation and translation matrices and a camera matrix. More...

int	core::math::getBlobIntersectionArea (const cv::Mat &blobImg, const std::vector< cv::Point > &contour1, const std::vector< cv::Point > &contour2)
	Calculates the intersection area of two blobs. More...

void	core::math::getBlobCorners (const std::vector< cv::Point > &blob, cv::Point &tl, cv::Point &tr, cv::Point &br, cv::Point &bl)
	Retrieves the corners of a blob. More...

float	core::math::getAngleBetween (cv::Point a_begin, cv::Point a_end, cv::Point b_begin, cv::Point b_end)
	Calculates the angle between two line segments. More...

cv::Point	core::math::getMean (const std::vector< cv::Point > &vec)
	Calculates the mean point of a vector of points. More...

Detailed Description

Core utilities for image and math operations using OpenCV.

Function Documentation

◆ createQuadraticRect()

void core::image::createQuadraticRect	(	cv::Rect &	r,
		const cv::Rect &	imageRect
	)

Creates a quadratic rectangle based on an existing rectangle.

Parameters

r	Reference to the new quadratic rectangle.
imageRect	The existing rectangle to base the new rectangle on.

◆ eulerAnglesFromRotationVector()

void core::math::eulerAnglesFromRotationVector	(	const cv::Mat &	rotationVector,
		cv::Vec3d &	eulerAngles
	)

Calculates Euler angles from a rotation vector.

Usage example: Vec3d eulerAngles; eulerAnglesFromRotationVector(rotationVector, eulerAngles);

Parameters

rotationVector	The input rotation vector.
eulerAngles	Output Euler angles (yaw, pitch, roll).

◆ eulerAnglesToRotationMatrix()

cv::Mat core::math::eulerAnglesToRotationMatrix ( const cv::Vec3f & theta )

Converts Euler angles to a rotation matrix.

Parameters

theta The input Euler angles.

Returns: cv::Mat The output rotation matrix.

◆ findProjectedPoint()

cv::Point2d core::math::findProjectedPoint	(	const cv::Mat &	rotation_matrix,
		const cv::Mat &	translation_vector,
		const cv::Mat	camera_matrix,
		cv::Point3d	model_point
	)

Finds the projected point using rotation and translation matrices and a camera matrix.

Parameters

rotation_matrix	Rotation matrix.
translation_vector	Translation vector.
camera_matrix	Camera matrix.
model_point	The 3D model point.

Returns: cv::Point2d The projected 2D point.

◆ getAngleBetween()

float core::math::getAngleBetween	(	cv::Point	a_begin,
		cv::Point	a_end,
		cv::Point	b_begin,
		cv::Point	b_end
	)

Calculates the angle between two line segments.

Parameters

a_begin	Start point of the first line segment.
a_end	End point of the first line segment.
b_begin	Start point of the second line segment.
b
b_end	End point of the second line segment.

Returns: float The angle in radians between the two line segments.

◆ getBlobCorners()

void core::math::getBlobCorners	(	const std::vector< cv::Point > &	blob,
		cv::Point &	tl,
		cv::Point &	tr,
		cv::Point &	br,
		cv::Point &	bl
	)

Retrieves the corners of a blob.

Parameters

blob	The vector of points defining the blob.
tl	Top-left corner of the blob.
tr	Top-right corner of the blob.
br	Bottom-right corner of the blob.
bl	Bottom-left corner of the blob.

◆ getBlobIntersectionArea()

int core::math::getBlobIntersectionArea	(	const cv::Mat &	blobImg,
		const std::vector< cv::Point > &	contour1,
		const std::vector< cv::Point > &	contour2
	)

Calculates the intersection area of two blobs.

Parameters

blobImg	The image containing blobs.
contour1	The first contour.
contour2	The second contour.

Returns: int The area of intersection between the two contours.

◆ getMean()

cv::Point core::math::getMean ( const std::vector< cv::Point > & vec )

Calculates the mean point of a vector of points.

Parameters

vec	The vector containing the points.

Returns: cv::Point The mean point.

◆ histogramEqualization()

void core::image::histogramEqualization ( cv::Mat & frame )

Performs histogram equalization on a given frame.

Parameters

frame Reference to the frame for histogram equalization.

◆ perspectiveTransformPoint()

cv::Point core::math::perspectiveTransformPoint	(	const cv::Point2f &	pt,
		cv::Mat &	transformation
	)

Performs perspective transformation on a point.

Parameters

pt	The point for transformation.
transformation	The transformation matrix.

Returns: cv::Point The transformed point.

◆ resizeRect()

void core::image::resizeRect	(	cv::Rect &	rect,
		double	scaleFactor
	)

Resizes a rectangle by a given scale factor.

Parameters

rect	Reference to the rectangle to resize.
scaleFactor	The scale factor for resizing.

◆ rotatePoint()

cv::Point3d core::math::rotatePoint	(	const cv::Point3d &	point,
		const cv::Mat &	rotationmatrix
	)

Rotates a point using a given rotation matrix.

Parameters

point	The point to rotate.
rotationmatrix	The rotation matrix.

Returns: cv::Point3d The rotated point.

Functions

Detailed Description

Function Documentation

◆ createQuadraticRect()

◆ eulerAnglesFromRotationVector()

◆ eulerAnglesToRotationMatrix()

◆ findProjectedPoint()

◆ getAngleBetween()

◆ getBlobCorners()

◆ getBlobIntersectionArea()

◆ getMean()

◆ histogramEqualization()

◆ perspectiveTransformPoint()

◆ resizeRect()

◆ rotatePoint()