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WarpOperatorsApproximationAccuracy Method (McWarp)
Read/write property used to calculate Thin-Plate Spline transform for Points and Features using Newton's method.

Namespace:  MediaCy.IQL.Operators
Assembly:  MediaCy.IQL.Operators (in MediaCy.IQL.Operators.dll) Version: 3.1.0.0
Syntax
VB
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<ExtensionAttribute>
Public Shared Function ApproximationAccuracy ( 
	warp As McWarp
) As Double

Parameters

warp
Type: MediaCy.IQL.OperationsMcWarp

Return Value

Type: Double

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type McWarp. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
Remarks
Spline transform for image (ApplyToImage) uses inverse transform, where destination and source points are swapped. It's done to avoid empty points on destination image. Spline transform on Points (ApplyToPoints) and Features (ApplyToFeatures) is done using the straight transform. Thin-Plate Spline transform is not mathematically invertible, so the results on image and Features can be slightly different, though the fiducial points are transferred correctly and their positions on straight (Points,Features) and inverse (Image) transforms are the same. Setting ApproximationAccuracy to a non-zero value activates mode, where transform for Points and Features is calculated using Newton's method (iterative approximation) from the inverse result. It produces results very close to the image transform. Note, that Newton's method converges when the deformations aren’t too severe. ApproximationAccuracy defines how accurate the coordinates will be converted. The lower the value, the more iterative approximation steps are involved. Recommended value is 0.1. The default value is 0 and iterative approximation is disabled.
See Also