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AVL.DetectPaths Method

Finds paths in an image.

Namespace:	AvlNet
Assembly:	AVL.NET.dll

Syntax

public static void DetectPaths(
	AvlNet.Image inImage,
	AvlNet.Path inPath,
	float inMinScore,
	float inEdgeThreshold,
	out AvlNet.Path[] outPaths,
	out float[] outScores,
	out AvlNet.Image diagGradientMagnitudeImage,
	out AvlNet.Image diagScoreImage
)

Parameters

Name	Type	Range	Default	Description
inImage	AvlNet.Image			Input image.
inPath	AvlNet.Path			Input path.
inMinScore	float	<0.0f, INF>	20.0f	Minimum matching score. Default value: 20.0f.
inEdgeThreshold	float		10.0f	Minimum accepted edge magnitude. Default value: 10.0f.
outPaths	AvlNet.Path			Output paths.
outScores	float			Output scores.
diagGradientMagnitudeImage	AvlNet.Image			Visualized gradients magnitude of an input image.
diagScoreImage	AvlNet.Image			Calculated score for each pixel of an input image.

Description

The operation detects paths in the inImage using the Generalized Hough Transform approach. The output array is ordered from best matching to worst matching results.

Examples

A sample path (scaled for convenience).

DetectPaths performed on the sample images with inMinScore = 0.7.

Remarks

DetectPaths is not scale- or rotation-invariant (slightly scaled or rotated paths are, however, detected properly).

Long inPaths cause long computation time.

Errors

Error type	Description
DomainError	Degenerate path in DetectPaths.