visualization Namespace Reference

The visualization namespace contains classes and functions related to visual asset management. More...

Classes
class	Triangle
	Represents a triangle with vertex indices. More...
class	FaceDrawer
	Draws triangulation on faces based on facial points. More...
class	VisualAsset
	The VisualAsset class manages visual assets like images for rendering and manipulation. More...

Functions
cv::Scalar	baseGreenColor (91, 192, 75)
cv::Scalar	baseBrightGreenColor (91, 222, 75)
double	drawNormalizedEye (cv::Mat &image, cv::Rect position, std::vector< cv::Point > eyeLidFrom, std::vector< cv::Point > iris)
	Draw the normalized eye on the given image and return the iris-pupil size ratio. More...
void	drawLandmarks (cv::Mat &image, const std::vector< cv::Point > &points, cv::Scalar color, const std::vector< std::pair< int, int >> &connections, double alpha=0.0)
	Draw landmarks on the given image. More...
void	drawHalo (cv::Mat &image, cv::Rect faceRect, std::vector< visualization::VisualAsset > &assets, double rotationKernel)
	Draw a halo effect on the given face rectangle in the image. More...
void	drawInfo (cv::Mat &image, cv::Rect faceRect, visualization::VisualAsset &infoBox, const std::string &info)
	Draw information box on the given face rectangle in the image. More...
void	printText (cv::Mat &frame, cv::Point pos, std::string text, double fontScale)
	Print text on the given frame at the specified position. More...
double	findCircleX (const cv::Rect &rect, double y)
	Calculate the X coordinate on a circle for a given Y coordinate. More...
void	alphaBlendPixel (cv::Vec3b &dst, const cv::Vec3b &src, float alpha)
void	drawEllipse (cv::Mat &image, const cv::Point &center, int baseRadius, double scaleFactor, int startAngle, int endAngle, double thickness, cv::Scalar baseColor=baseGreenColor, cv::Scalar brightColor=baseBrightGreenColor)
	Draw a custom ellipse onto an image. More...
void	drawEllipseAlpha (cv::Mat &image, cv::Point center, int baseRadius, double scale, int startAngle, int endAngle, int thickness, const cv::Scalar &baseColor, const cv::Scalar &brightColor, float alpha)
void	drawHaloAnimation (cv::Mat image, cv::Rect faceRect, long long seed, cv::Scalar baseColor=baseGreenColor, cv::Scalar brightColor=baseBrightGreenColor)
	Draw an animated halo around the given face rectangle. More...
void	showDetectionProperties (cv::Mat &image, const std::map< std::string, std::string > &values, cv::Rect faceRect, cv::Point startPoint, cv::Scalar backgroundColor=baseGreenColor)
	Display detection properties next to a face region. More...

Variables
cv::Scalar	baseGreenColor
cv::Scalar	baseBrightGreenColor

Detailed Description

The visualization namespace contains classes and functions related to visual asset management.

Function Documentation

drawEllipse()

void visualization::drawEllipse	(	cv::Mat &	image,
		const cv::Point &	center,
		int	baseRadius,
		double	scaleFactor,
		int	startAngle,
		int	endAngle,
		double	thickness,
		cv::Scalar	baseColor = baseGreenColor,
		cv::Scalar	brightColor = baseBrightGreenColor
	)

Draw a custom ellipse onto an image.

Parameters

image	Destination image.
center	Center point of the ellipse.
baseRadius	Base radius used for scaling.
scaleFactor	Additional scaling factor for the radius.
startAngle	Starting angle of the ellipse arc.
endAngle	Length of the arc in degrees.
thickness	Thickness of the drawn lines.

drawHalo()

void visualization::drawHalo	(	cv::Mat &	image,
		cv::Rect	faceRect,
		std::vector< visualization::VisualAsset > &	assets,
		double	rotationKernel
	)

Draw a halo effect on the given face rectangle in the image.

Parameters

image	The image on which to draw the halo.
faceRect	The rectangle defining the face's position.
assets	A vector of visual assets to be used for the halo effect.
rotationKernel	The kernel for rotation transformation.

drawHaloAnimation()

void visualization::drawHaloAnimation	(	cv::Mat	image,
		cv::Rect	faceRect,
		long long	seed,
		cv::Scalar	baseColor = baseGreenColor,
		cv::Scalar	brightColor = baseBrightGreenColor
	)

Draw an animated halo around the given face rectangle.

Parameters

image	Image where the halo should be drawn.
faceRect	Rectangle of the detected face.
seed	Seed value controlling animation phase.

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drawInfo()

void visualization::drawInfo	(	cv::Mat &	image,
		cv::Rect	faceRect,
		visualization::VisualAsset &	infoBox,
		const std::string &	info
	)

Draw information box on the given face rectangle in the image.

Parameters

image	The image on which to draw the info box.
faceRect	The rectangle defining the face's position.
infoBox	The visual asset representing the info box.
info	The string containing the information to be displayed.

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drawLandmarks()

void visualization::drawLandmarks	(	cv::Mat &	image,
		const std::vector< cv::Point > &	points,
		cv::Scalar	color,
		const std::vector< std::pair< int, int >> &	connections,
		double	alpha = 0.0
	)

Draw landmarks on the given image.

Parameters

image	The image on which to draw the landmarks.
points	A vector of points representing the landmarks.
color	The color of the landmarks.
connections	A vector of pairs of integers representing the connections between landmarks.
alpha	Transparency of the landmarks.

drawNormalizedEye()

double visualization::drawNormalizedEye	(	cv::Mat &	image,
		cv::Rect	position,
		std::vector< cv::Point >	eyeLidFrom,
		std::vector< cv::Point >	iris
	)

Draw the normalized eye on the given image and return the iris-pupil size ratio.

Parameters

image	The image on which to draw.
position	The rectangle defining the position to draw the eye.
eyeLidFrom	A vector of points representing the eyelid.
iris	A vector of points representing the iris.

Returns

double The ratio of the iris to pupil size.

findCircleX()

double visualization::findCircleX	(	const cv::Rect &	rect,
		double	y
	)

Calculate the X coordinate on a circle for a given Y coordinate.

Parameters

rect	Bounding rectangle describing the circle.
y	Y coordinate for which the X coordinate should be returned.

Returns

The X coordinate on the circle or 0 if not valid.

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printText()

void visualization::printText	(	cv::Mat &	frame,
		cv::Point	pos,
		std::string	text,
		double	fontScale
	)

Print text on the given frame at the specified position.

Parameters

frame	The frame on which to print the text.
pos	The position at which to print the text.
text	The string of text to be printed.
fontScale	The scale of the font to be used.

showDetectionProperties()

void visualization::showDetectionProperties	(	cv::Mat &	image,
		const std::map< std::string, std::string > &	values,
		cv::Rect	faceRect,
		cv::Point	startPoint,
		cv::Scalar	backgroundColor = baseGreenColor
	)

Display detection properties next to a face region.

Parameters

image	Image onto which the text boxes are drawn.
values	Map of key-value property pairs to display.
faceRect	Rectangle of the detected face.
startPoint	Starting position for the first text box.

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