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AVL.ScanSingleStripe_Direct

Locates the strongest pair of edges across a given path (without a scan map).

Namespace:AvlNet
Assembly:AVL.NET.dll

Syntax

C++
C#
 
public static void ScanSingleStripe_Direct
(
	AvlNet.Image inImage,
	AvlNet.Path inScanPath,
	AvlNet.CoordinateSystem2D? inScanPathAlignment,
	int inScanWidth,
	AvlNet.SamplingParams inSamplingParams,
	AvlNet.StripeScanParams inStripeScanParams,
	AvlNet.Selection inStripeSelection,
	AvlNet.LocalBlindness? inLocalBlindness,
	INullable<AvlNet.Stripe1D> outStripe,
	NullableRef<AvlNet.Path> outAlignedScanPath,
	AvlNet.Profile diagBrightnessProfile,
	AvlNet.Profile diagResponseProfile,
	IList<AvlNet.Path> diagSamplingPoints,
	out float diagSamplingStep
)

Parameters

Name Type Range Default Description
inImageAvlNet.ImageInput image.
inScanPathAvlNet.PathPath along which the scan is performed.
inScanPathAlignmentAvlNet.CoordinateSystem2D?Adjusts the scan path to the position of the inspected object. Default value: atl::NIL.
inScanWidthint<1, INF>5Width of the scan field in pixels. Default value: 5.
inSamplingParamsAvlNet.SamplingParamsSamplingParams ( Interpolation: Bilinear SamplingStep: 1.0f SampleCount: Nil )Parameters controlling the sampling process. Default value: SamplingParams ( Interpolation: Bilinear SamplingStep: 1.0f SampleCount: Nil ).
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. Default value: StripeScanParams ( ProfileInterpolation: Quadratic4 SmoothingStdDev: 0.6f MinMagnitude: 5.0f MaxInnerEdgeMagnitude: Nil StripePolarity: Dark MinStripeWidth: 0.0f MaxStripeWidth: Nil ).
inStripeSelectionAvlNet.SelectionSelection mode of the resulting stripe.
inLocalBlindnessAvlNet.LocalBlindness?Defines conditions in which weaker edges can be detected in the vicinity of stronger edges. Default value: atl::NIL.
outStripeAvlNet.INullable<AvlNet.Stripe1D>Found stripe. This parameter cannot be null.
outAlignedScanPathAvlNet.NullableRef<AvlNet.Path>Transformed input path. Can be null to skip this parameter calculation.
diagBrightnessProfileAvlNet.ProfileExtracted image profile.
diagResponseProfileAvlNet.ProfileProfile of the edge (derivative) operator response.
diagSamplingPointsSystem.Collections.Generic.IList<AvlNet.Path>Array of paths each one containing the sampling points that contributes to a single value of the extracted profile.
diagSamplingStepfloatUsed distance between consecutive sampling points on the scan path.

Description

The operation scans the image along inScanPath and locates the strongest stripe (i.e. a pair of opposite-polarity edges running across the path) of the given characteristics. If there is no such stripe then the outputs are set to NIL.

The optional parameter inScanPathAlignment defines a transform to be performed on the inScanPath so that the actual scan path (outAlignedScanPath) is adjusted to the position of the object, typically detected by one of Template Matching filters.

Examples

ScanSingleStripe locates the strongest stripe across inScanPath.

Remarks

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

This filter is a part of the 1D Edge Detection toolset. For a comprehensive introduction to this technique please refer to 1D Edge Detection and 1D Edge Detection - Subpixel Precision chapters of our Machine Vision Guide.

Function Overrides

See also