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FIL.FitArcToEdges

Performs a series of 1D edge detections and finds an arc that best matches the detected points.

Namespace:FilNet
Assembly:FIL.NET.dll

Syntax

C++
C#
 
public static void FitArcToEdges
(
	FilNet.Image inImage,
	FilNet.ArcFittingMap inFittingMap,
	FilNet.EdgeScanParams inEdgeScanParams,
	FilNet.Selection inEdgeSelection,
	float inMaxIncompleteness,
	FilNet.CircleFittingMethod inFittingMethod,
	out FilNet.Arc2D? outArc
)

Parameters

Name Type Range Default Description
inImageFilNet.ImageInput image to fit arc to.
inFittingMapFilNet.ArcFittingMapInput fitting map.
inEdgeScanParamsFilNet.EdgeScanParamsParameters controlling the edge extraction process.
inEdgeSelectionFilNet.Selectionfil::Selection::BestSelection mode of edges. Default value: fil::Selection::Best.
inMaxIncompletenessfloat<0.0f, 0.999f>0.1fMaximal fraction of edge points not found. Default value: 0.1f.
inFittingMethodFilNet.CircleFittingMethodAlgebraicTaubinMethod used to fit an arc. Default value: AlgebraicTaubin.
outArcFilNet.Arc2D?Fitted arc or nothing if the fitting fails.

Description

The operation tries to fit a given arc to edges present in the inImage image. Internally, it performs a series of scans with the ScanSingleEdge filter using inFittingMap previously generated from the object being fitted. The found points are then used to determine the actual position of the arc in the image. Only inMaxIncompleteness fraction of these scans may fail. If the fitting according to the given parameters is not possible, outArc is set to Nil.

Examples

Fitting an arc to the edges of a semi-hole
(inEdgeScanParams.Transition = BrightToDark).

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