CogNPointToNPoint.ComputeGroupAFromGroupBTransform Method

CogNPointToNPoint ComputeGroupAFromGroupBTransform Method

Cognex VisionPro 9.8

Compute and return a best-fit transformation between 'group A' points and 'group B' points. The RMS error of the computation can also be obtained. The returned transform maps points from the 'group B' space to the 'group A' space.

Namespace: Cognex.VisionPro.CalibFix
Assembly: Cognex.VisionPro.CalibFix (in Cognex.VisionPro.CalibFix.dll) Version: 75.1.0.0

Syntax

C++

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public ICogTransform2D ComputeGroupAFromGroupBTransform(
	out double rmsError
)

public ICogTransform2D ComputeGroupAFromGroupBTransform(
	out double rmsError
)

Public Function ComputeGroupAFromGroupBTransform ( 
	<OutAttribute> ByRef rmsError As Double
) As ICogTransform2D

Public Function ComputeGroupAFromGroupBTransform ( 
	<OutAttribute> ByRef rmsError As Double
) As ICogTransform2D

public:
ICogTransform2D^ ComputeGroupAFromGroupBTransform(
	[OutAttribute] double% rmsError
)

public:
ICogTransform2D^ ComputeGroupAFromGroupBTransform(
	[OutAttribute] double% rmsError
)

Parameters

rmsError: Type: System Double
The root mean squared (RMS) error between the sets of points.

Return Value

Type: ICogTransform2D

A best-fit transform.

Exceptions

Exception	Condition
CogCalibFixNPointTooFewPointsException	There are too few points for the requested DOFs.
CogCalibFixNPointUnstableException	The points are in a configuration that is numerically unstable or ambiguous. For example, all points lie along the x-axis and the DOFs need to measure y-axis scaling.

Remarks

Computes and returns a best-fit transformation between "group A" points and "group B" points, given the allowed degrees of freedom. You can obtain the RMS error data for the computation by supplying a non-NULL rmsError variable. The returned transform maps points from the "group B" space to the "group A" space.