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AVL.FitSegmentToStripe_Direct

Namespace:AvlNet
Assembly:AVL.NET.dll

Syntax

C++
C#
 
public static void FitSegmentToStripe_Direct
(
	AvlNet.Image inImage,
	AvlNet.SegmentFittingField inFittingField,
	AvlNet.CoordinateSystem2D? inFittingFieldAlignment,
	int inScanCount,
	int inScanWidth,
	AvlNet.SamplingParams inSamplingParams,
	AvlNet.StripeScanParams inStripeScanParams,
	AvlNet.Selection inStripeSelection,
	AvlNet.LocalBlindness? inLocalBlindness,
	float inMaxIncompleteness,
	AvlNet.LineMEstimator? inOutlierSuppression,
	out AvlNet.Segment2D? outSegment,
	out AvlNet.Segment2D? outLeftSegment,
	out AvlNet.Segment2D? outRightSegment,
	IList<NullableRef<AvlNet.Stripe1D>> outStripes,
	IList<AvlNet.Point2D> outStripePoints,
	INullable<AvlNet.Profile> outDeviationProfile,
	out AvlNet.SegmentFittingField outAlignedFittingField,
	IList<AvlNet.Segment2D> diagScanSegments,
	IList<AvlNet.Rectangle2D> diagSamplingAreas,
	IList<AvlNet.Profile> diagBrightnessProfiles,
	IList<AvlNet.Profile> diagResponseProfiles
)

Parameters

Name Type Range Default Description
inImageAvlNet.ImageImage to fit segment to
inFittingFieldAvlNet.SegmentFittingFieldSegment fitting field
inFittingFieldAlignmentAvlNet.CoordinateSystem2D?Adjusts the fitting field to the position of the inspected object
inScanCountint<3, INF>10The number of points that will be searched to estimate the position of the segment
inScanWidthint<1, INF>5The width of each scan field (in pixels)
inSamplingParamsAvlNet.SamplingParamsParameters controlling the sampling process
inStripeScanParamsAvlNet.StripeScanParamsStripeScanParams ( ProfileInterpolation: Quadratic4 SmoothingStdDev: 0.6f MinMagnitude: 5.0f MaxInnerEdgeMagnitude: Nil StripePolarity: Dark MinStripeWidth: 0.0f MaxStripeWidth: Nil )Parameters controlling the stripe extraction process
inStripeSelectionAvlNet.SelectionSelection mode of stripe
inLocalBlindnessAvlNet.LocalBlindness?Defines conditions in which weaker edges can be detected in the vicinity of stronger edges
inMaxIncompletenessfloat<0.0f, 0.999f>0.1fMaximal fraction of stripe points not found
inOutlierSuppressionAvlNet.LineMEstimator?Selects a method for ignoring incorrectly detected points
outSegmentAvlNet.Segment2D?Fitted segment in the middle of found stripe
outLeftSegmentAvlNet.Segment2D?Fitted left segment
outRightSegmentAvlNet.Segment2D?Fitted right segment
outStripesSystem.Collections.Generic.IList<AvlNet.NullableRef<AvlNet.Stripe1D>>Found stripes
outStripePointsSystem.Collections.Generic.IList<AvlNet.Point2D>Extracted points of middle segment of an image stripe
outDeviationProfileAvlNet.INullable<AvlNet.Profile>Profile of distances between the actual segment points and the corresponding reference segment points
outAlignedFittingFieldAvlNet.SegmentFittingFieldFitting field used; in the image coordinate system
diagScanSegmentsSystem.Collections.Generic.IList<AvlNet.Segment2D>Segments along which the scans were run
diagSamplingAreasSystem.Collections.Generic.IList<AvlNet.Rectangle2D>Areas from which the input image is sampled
diagBrightnessProfilesSystem.Collections.Generic.IList<AvlNet.Profile>Extracted image profiles
diagResponseProfilesSystem.Collections.Generic.IList<AvlNet.Profile>Profiles of the edge (derivative) operator response

Description

The operation tries to fit a given segment to stripe present in the inImage image. Internally, it performs a series of scans with the ScanSingleStripe_Direct filter along inScanCount specific scan segments which length is always equal to the inFittingField width and cannot be less than 4. The found points are then used to determine the actual position of the segment in the image. Only inMaxIncompleteness fraction of these scans may fail. If the fitting according to the given parameters is not possible, outSegment is set to Nil.

Examples

Fitting a segment to the dark stripe of a nail
(inStripeScanParams.Polarity = Dark).

Remarks

Read more about Local Coordinate Systems in Machine Vision Guide: Local Coordinate Systems.

This filter is a part of the Shape Fitting toolset. To read more about this technique, one can refer to the Shape Fitting chapter of our Machine Vision Guide

Hardware Acceleration

This operation supports automatic parallelization for multicore and multiprocessor systems.

Hardware acceleration settings may be manipulated with Settings class.

Function Overrides

See also