You are here: Start » Function Reference » Computer Vision » Shape Fitting 3D » FitPathToRidges3D_Direct

FitPathToRidges3D_Direct

Header:	AVL.h
Namespace:	avl
Module:	Vision3DStandard

Performs a series of 1D ridge detections in 3D and creates a path from the detected points.

Applications: Tracing of a thin line, whose rough location and shape is known beforehand.

Syntax

void avl::FitPathToRidges3D_Direct
(
	const avl::Surface& inSurface,
	const avl::PathFittingField& inFittingField,
	atl::Optional<const avl::CoordinateSystem2D&> inFittingFieldAlignment,
	atl::Optional<float> inScanStep,
	atl::Optional<float> inSamplingStep,
	int inScanWidth,
	const avl::InterpolationMethod::Type inSurfaceInterpolation,
	const avl::RidgeScanParams3D& inRidgeScanParams,
	avl::Selection::Type inRidgeSelection,
	atl::Optional<const avl::LocalBlindness&> inLocalBlindness,
	atl::Optional<int> inMaxProfileGapWidth,
	atl::Optional<int> inMaxPathInterpolationLength,
	atl::Optional<float> inMaxDeviationDelta,
	float inMaxIncompleteness,
	atl::Conditional<atl::Array<avl::Point3D> >& outPath,
	atl::Optional<atl::Array<atl::Conditional<avl::SurfaceRidge1D> >&> outRidges = atl::NIL,
	atl::Optional<atl::Conditional<avl::Profile>&> outDeviationProfile = atl::NIL,
	atl::Optional<avl::PathFittingField&> outAlignedFittingField = atl::NIL,
	atl::Optional<atl::Conditional<atl::Array<avl::Segment3D> >&> outPathSegments = atl::NIL,
	atl::Array<avl::Segment2D>& diagScanSegments,
	atl::Array<avl::Rectangle2D>& diagSamplingAreas,
	atl::Array<avl::Profile>& diagHeightProfiles,
	atl::Array<avl::Profile>& diagResponseProfiles
)

Parameters

Name	Type	Range	Default	Description
inSurface	const Surface&			Surface to fit the path to
inFittingField	const PathFittingField&			Path fitting field
inFittingFieldAlignment	Optional<const CoordinateSystem2D&>		NIL	Adjusts the fitting field to the position of the inspected object
inScanStep	Optional<float>	0.0 -	5.0f	Optional implicit conversion of the input path to an equidistant one
inSamplingStep	Optional<float>	0.0 -	NIL	Desired distance between consecutive sampling points on the scan segments; if Nil, the bigger of surface X and Y scales is chosen
inScanWidth	int	1 -	5	The width of each scan field (in pixels)
inSurfaceInterpolation	const InterpolationMethod::Type		Bilinear	Interpolation method used for extraction of surface points
inRidgeScanParams	const RidgeScanParams3D&		RidgeScanParams3D ( ProfileInterpolation: Quadratic4 SmoothingStdDev: 0.6f RidgeWidth: 5.0f RidgeMargin: 2.0f RidgeOperator: Minimum MinMagnitude: 5.0f RidgePolarity: Low )	Parameters controlling the ridge extraction process
inRidgeSelection	Selection::Type			Selection mode of ridges
inLocalBlindness	Optional<const LocalBlindness&>		NIL	Defines conditions in which weaker ridges can be detected in the vicinity of stronger ridges
inMaxProfileGapWidth	Optional<int>	0 -	1	Maximal number of consecutive not existing profile points
inMaxPathInterpolationLength	Optional<int>	0 -	1	Maximal number of consecutive points not found
inMaxDeviationDelta	Optional<float>	0.0 -	NIL	Maximal difference between deviations of consecutive path points
inMaxIncompleteness	float	0.0 - 0.999	0.1f	Maximal fraction of ridge points not found
outPath	Conditional<Array<Point3D> >&			Fitted path or nothing if the fitting failed
outRidges	Optional<Array<Conditional<SurfaceRidge1D> >&>		NIL	Found ridges
outDeviationProfile	Optional<Conditional<Profile>&>		NIL	Profile of distances between the actual path points and the corresponding reference path points
outAlignedFittingField	Optional<PathFittingField&>		NIL	Fitting field used; in the image coordinate system
outPathSegments	Optional<Conditional<Array<Segment3D> >&>		NIL	Segments of the fitted path or nothing if the fitting failed
diagScanSegments	Array<Segment2D>&			Segments along which the scans were run
diagSamplingAreas	Array<Rectangle2D>&			Areas from which the input image is sampled
diagHeightProfiles	Array<Profile>&			Extracted surface height profiles
diagResponseProfiles	Array<Profile>&			Profiles of the ridge operator response

Optional Outputs

The computation of following outputs can be switched off by passing value atl::NIL to these parameters: outRidges, outDeviationProfile, outAlignedFittingField, outPathSegments.

Hardware Acceleration

This operation supports automatic parallelization for multicore and multiprocessor systems.

Errors

List of possible exceptions:

Error type	Description
DomainError	Ridge operator parameters are too low in surface ridges detector in FitPathToRidges3D.
DomainError	Sampling step set to zero in FitPathToRidges3D.