You are here: Start » AVL.NET » AVL.FitCircleToEdges(AvlNet.Image, AvlNet.CircleFittingMap, AvlNet.EdgeScanParams, AvlNet.Selection, AvlNet.LocalBlindness, float, AvlNet.CircleFittingMethod, AvlNet.MEstimator?, AvlNet.Circle2D?, AvlNet.Point2D[], AvlNet.Profile, float[], AvlNet.Profile[], AvlNet.Profile[])

AVL.FitCircleToEdges(AvlNet.Image, AvlNet.CircleFittingMap, AvlNet.EdgeScanParams, AvlNet.Selection, AvlNet.LocalBlindness, float, AvlNet.CircleFittingMethod, AvlNet.MEstimator?, AvlNet.Circle2D?, AvlNet.Point2D[], AvlNet.Profile, float[], AvlNet.Profile[], AvlNet.Profile[])

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

Namespace:	AvlNet
Assembly:	AVL.NET.dll

Syntax


public static void FitCircleToEdges(
	AvlNet.Image inImage,
	AvlNet.CircleFittingMap inFittingMap,
	AvlNet.EdgeScanParams inEdgeScanParams,
	AvlNet.Selection inEdgeSelection,
	AvlNet.LocalBlindness inLocalBlindness,
	float inMaxIncompleteness,
	AvlNet.CircleFittingMethod inFittingMethod,
	AvlNet.MEstimator? inOutlierSuppression,
	out AvlNet.Circle2D? outCircle,
	out AvlNet.Point2D[] outEdgePoints,
	out AvlNet.Profile outDeviationProfile,
	out float[] outEdgeMagnitudes,
	out AvlNet.Profile[] diagBrightnessProfiles,
	out AvlNet.Profile[] diagResponseProfiles
)

Parameters

inImage: Type: AvlNet.Image
Image to fit the circle to
inFittingMap: Type: AvlNet.CircleFittingMap
Input fitting map
inEdgeScanParams: Type: AvlNet.EdgeScanParams
Parameters controlling the edge extraction process
inEdgeSelection: Type: AvlNet.Selection
Selection mode of edges
inLocalBlindness: Type: AvlNet.LocalBlindness
Defines conditions in which weaker edges can be detected in the vicinity of stronger edges, or null.
inMaxIncompleteness: Type: System.Single
Maximal fraction of edge points not found
inFittingMethod: Type: AvlNet.CircleFittingMethod
Method used to fit a circle
inOutlierSuppression: Type: System.Nullable<AvlNet.MEstimator>
Selects a method for ignoring incorrectly detected points, or null.
outCircle: Type: System.Nullable<AvlNet.Circle2D>
Fitted circle or nothing if the fitting fails
outEdgePoints: Type: AvlNet.Point2D
outDeviationProfile: Type: AvlNet.Profile
outEdgeMagnitudes: Type: System.Single
diagBrightnessProfiles: Type: AvlNet.Profile
Extracted image profiles
diagResponseProfiles: Type: AvlNet.Profile
Profiles of the edge (derivative) operator response

Description

The operation tries to fit a given circle 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 circle in the image. Only inMaxIncompleteness fraction of these scans may fail. If the fitting according to the given parameters is not possible, outCircle is set to Nil.

Examples

Fitting a circles to the edges of a hole
(inEdgeScanParams.Transition = BrightToDark).

Remarks

For more information about local coordinate systems please refer to the following article.