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AdjustPathArraysToEdges

Header:	AVL.h
Namespace:	avl
Module:	FoundationPro

Translates, rotates and scales multiple contour sets (PathArray), each separately, to the edges of the input image with subpixel precision.

Applications: Fine-tune results of edge-based template matching.

Syntax

void avl::AdjustPathArraysToEdges
(
	const avl::Image& inImage,
	const atl::Array<atl::Array<avl::Path>>& inPaths,
	atl::Optional<float> inPointSpacing,
	atl::Optional<const atl::Array<avl::CoordinateSystem2D>&> inAlignments,
	float inAttractionRadius,
	avl::AdjustmentMetric::Type inAdjustmentMetric,
	bool inAdjustTranslation,
	bool inAdjustRotation,
	bool inAdjustScale,
	int inIterationCount,
	float inBaseGradient,
	atl::Array<atl::Array<avl::Path>>& outAdjustedPaths,
	atl::Array<avl::CoordinateSystem2D>& outAlignments,
	atl::Array<atl::Array<avl::Segment2D>>& diagAttractionVectors
)

Parameters

Name	Type	Range	Default	Description
inImage	const Image&			Input image.
inPaths	const Array<Array<Path>>&			Paths to be adjusted. For sparse, synthetic paths the inPointSpacing needs to be specified.
inPointSpacing	Optional<float>	1.0 -	NIL	If set, sampling points of the input path will be equidistant with specified spacing. Useful for increasing density of synthetic, sparse paths.
inAlignments	Optional<const Array<CoordinateSystem2D>&>		NIL	Alignments to be corrected, usually connect to outObjects.Alignment[] of LocateObjects:Multiple filter.
inAttractionRadius	float	0.1 -	2.0f	Expected initial distance between inPaths and edges of the input image.
inAdjustmentMetric	AdjustmentMetric::Type		SegmentDistance	Metric used for path attraction. The SegmentDistance minimizes distances along path normal vectors, and thus adjustment is more accurate. PointDistance_* minimize euclidean distance, adjustment tends to be more stable.
inAdjustTranslation	bool		True	Compute the translation part of adjustment transform. Must be true when using AttractPathTangents estimation method.
inAdjustRotation	bool		True	Compute the rotation part of adjustment transform.
inAdjustScale	bool		False	Compute the scale part of adjustment transform.
inIterationCount	int	0 - 100	6	Number of iterations of internal adjustment algorithm.
inBaseGradient	float	0.1 -	1.0f	Threshold for suppression of weak input image gradients. Increase for very noisy images.
outAdjustedPaths	Array<Array<Path>>&			Adjusted output paths.
outAlignments	Array<CoordinateSystem2D>&			Corrected alignments - inAlignments input modified with estimated adjustment parameters.
diagAttractionVectors	Array<Array<Segment2D>>&			Attraction vectors from first iteration.

Hints

This filter is a multiple object version of AdjustPathArrayToEdges, however it achieves much higher performance than AdjustPathArrayToEdges executed in a loop.
Please refer to AdjustPathArrayToEdges documentation for more information.

Hardware Acceleration

This operation is optimized for SSSE3 technology for pixels of type: UINT8.

This operation is optimized for AVX2 technology for pixels of type: UINT8.

This operation is optimized for NEON technology for pixels of type: UINT8.

This operation supports automatic parallelization for multicore and multiprocessor systems.

Errors

List of possible exceptions: