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FitCircleToRidges3D


Module: Vision3DStandard

Performs a series of 1D ridge detections in 3D and finds a circle that best matches the detected points.

Applications

Precise detection of a circular object or hole, whose rough location is known beforehand.
Name Type Range Description
Input value inSurface Surface Surface to fit the circle to
Input value inFittingField CircleFittingField Circle fitting field
Input value inFittingFieldAlignment CoordinateSystem2D* Adjusts the fitting field to the position of the inspected object
Input value inScanCount Integer 3 - The number of points that will be searched to estimate the position of the circle
Input value inSamplingStep Real* 0.0 - Desired distance between consecutive sampling points on the scan segments; if Nil, the bigger of surface X and Y scales is chosen
Input value inScanWidth Integer 1 - The width of each scan field (in pixels)
Input value inSurfaceInterpolation InterpolationMethod Interpolation method used for extraction of surface points
Input value inRidgeScanParams RidgeScanParams3D Parameters controlling the ridge extraction process
Input value inRidgeSelection Selection Selection mode of ridges
Input value inLocalBlindness LocalBlindness* Defines conditions in which weaker ridges can be detected in the vicinity of stronger ridges
Input value inMaxProfileGapWidth Integer* 0 - Maximal number of consecutive not existing profile points
Input value inMaxIncompleteness Real 0.0 - 0.999 Maximal fraction of ridge points not found
Input value inFittingMethod CircleFittingMethod Method used to fit a circle
Input value inOutlierSuppression MEstimator* Selects a method for ignoring incorrectly detected points
Output value outCircle Circle3D? Fitted circle or nothing if the fitting fails
Output value outRidges SurfaceRidge1D?Array Found ridges
Output value outDeviationProfile Profile? Profile of distances between the actual circle points and the corresponding reference circle points
Output value outAlignedFittingField CircleFittingField Fitting field used; in the image coordinate system
Output value outInliers Point3DArray Points matching the fitting Circle
Output value outHeightProfiles ProfileArray Extracted surface height profiles
Output value outResponseProfiles ProfileArray Profiles of the ridge operator response
Diagnostic input diagScanSegments Segment2DArray Segments along which the scans were run
Diagnostic input diagSamplingAreas Rectangle2DArray Areas from which the input image is sampled

Hardware Acceleration

This operation supports automatic parallelization for multicore and multiprocessor systems.

Errors

This filter can throw an exception to report error. Read how to deal with errors in Error Handling.

List of possible exceptions:

Error type Description
DomainError Ridge operator parameters are too low in surface ridges detector in FitCircleToRidges3D.
DomainError Sampling step set to zero in FitCircleToRidges3D.

Complexity Level

This filter is available on Basic Complexity Level.

Filter Group

This filter is member of FitCircle3D filter group.