VIS Module

Classes
class	DirectGraphicalModels::vis::CMarker
	Marker class. More...
class	DirectGraphicalModels::vis::CMarkerHistogram
	Histogram Marker class. More...

Functions
Mat	DirectGraphicalModels::vis::drawDictionary (const Mat &dictionary, double m=1)
	Visualizes a sparse coding dictionary. More...
Mat	DirectGraphicalModels::vis::drawGraph (int size, IGraphPairwise &graph, std::function< Point2f(size_t)> posFunc, std::function< cv::Scalar(size_t)> colorFunc=nullptr, const vec_scalar_t &groupsColor=vec_scalar_t())
	Visualizes the graph structure. More...
void	DirectGraphicalModels::vis::showGraph3D (int size, IGraphPairwise &graph, std::function< Point3f(size_t)> posFunc, std::function< cv::Scalar(size_t)> colorFunc=nullptr, const vec_scalar_t &groupsColor=vec_scalar_t())
	Visualizes the graph structure in 3D. More...

Detailed Description

Visualization Module

Marker module provides with a variety of tools for visualizing and analyzing used data as well as intermediate and final results:

• CMarker::markClasses() for visualizing the classification results;
• CMarker::drawPotentials() for visualizing the node and edge potentials;
• CMarker::drawConfusionMatrix() for visualizing and analyzing the qualitative classification results;
• CMarkerHistogram::drawHistogram() for visualizing and analyzing distribution of features for given classes;
• CMarkerHistogram::showHistogram() for showing the window with the feature distribution histograms with user interaction capacity;
• drawDictionary() for visualizing the sparse dictionaries;
• drawGraph() for visualizing the graphical models;
• showGraph3D() for visualizing the graphical models in 3D with user interaction capacity.

For user interaction capacity, there are more functions, which allow for handling the mouse clicks over the figures. Please see our tutorial Demo Visualization for more details.

Author

Sergey G. Kosov, serge.nosp@m.y.ko.nosp@m.sov@p.nosp@m.roje.nosp@m.ct-10.nosp@m..de

Function Documentation

drawDictionary()

Mat DirectGraphicalModels::vis::drawDictionary	(	const Mat &	dictionary,
		double	m = 1
	)

Visualizes a sparse coding dictionary.

This function visualizes a dictionary, that is returned by fex::CSparseDictionary::getDictionary() fucntion

Parameters

dictionary	Dictionary: Mat of type: CV_64FC1
m	The magnifier koefficients for scaling the dictionary values

Returns

Figure with visualized dictionary

Definition at line 324 of file Marker.cpp.

drawGraph()

Mat DirectGraphicalModels::vis::drawGraph	(	int	size,
		IGraphPairwise &	graph,
		std::function< Point2f(size_t)>	posFunc,
		std::function< cv::Scalar(size_t)>	colorFunc = nullptr,
		const vec_scalar_t &	groupsColor = vec_scalar_t()
	)

Visualizes the graph structure.

Parameters

size	The size of resulting image
graph	The graph
posFunc	The positioning function: a mapper, that defines spacial position at the canvas for every graph node. The coordinates must lie in range [-1; 1]. For example: Point2f posFunc(size_t nodeId) { return Point2f( 0.9f * cosf(2 * n * Pif / nNodes), 0.9f * sinf(2 * n * Pif / nNodes) ); });
colorFunc	The color function: a mapper, that defines color (CV_RGB(r, g, b)) for every graph node.
groupsColor	The list of colors for graph edge groups.

Returns

Image size x size pixels with visualized graph.

Definition at line 76 of file MarkerGraph.cpp.

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showGraph3D()

void DirectGraphicalModels::vis::showGraph3D	(	int	size,
		IGraphPairwise &	graph,
		std::function< Point3f(size_t)>	posFunc,
		std::function< cv::Scalar(size_t)>	colorFunc = nullptr,
		const vec_scalar_t &	groupsColor = vec_scalar_t()
	)

Visualizes the graph structure in 3D.

This function creates an OpenGL window with the visualized graph, seen from a trackball camera. User may rotate, zoom, pan and centralize the visualized graph.

In order to use this function, OpenGL must be built with the USE_OPENGL flag

Parameters

size	The size of the viewing window (size x size pixels)
graph	The graph
posFunc	The positioning function: a mapper, that defines spacial position in 3D world for every graph node. For better wieving expierence, the coordinates should lie in range [-0.5; 0.5]. For example: Point3f posFunc(size_t nodeId) { return Point3f( 0.9f * cosf(2 * n * Pif / nNodes), 0.9f * sinf(2 * n * Pif / nNodes), static_cast<float>(n) / nNodes ); });
colorFunc	The color function: a mapper, that defines color (CV_RGB(r, g, b)) for every graph node.
groupsColor	The list of colors for graph edge groups.

Definition at line 322 of file MarkerGraph.cpp.

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