FitPathToEdges3D_Direct


Performs a series of 1D edge detections in 3D and creates a path from the detected points.

Applications:Tracing of an object contour, whose rough location and shape is known beforehand.

Syntax

C++
C#
Python
 
def FitPathToEdges3D_Direct(
	inSurface: Surface,
	inFittingField: PathFittingField,
	/,
	*,
	inFittingFieldAlignment: CoordinateSystem2D | None = None,
	inScanStep: float | None = 5.0,
	inSamplingStep: float | None = None,
	inScanWidth: int = 5,
	inSurfaceInterpolation: InterpolationMethod = InterpolationMethod.Bilinear,
	inEdgeScanParams: EdgeScanParams3D = EdgeScanParams3D(ProfileInterpolationMethod.Quadratic4, 1.0, 5.0, SurfaceEdgeTransition.LowToHigh),
	inEdgeSelection: Selection = Selection.Best,
	inLocalBlindness: LocalBlindness | None = None,
	inMaxProfileGapWidth: int | None = 1,
	inMaxPathInterpolationLength: int | None = 1,
	inMaxDeviationDelta: float | None = None,
	inMaxIncompleteness: float = 0.1,
	outAlignedFittingField: PathFittingField | None = None
)
-> (
	outPath: list[Point3D] | None,
	outEdges: list[SurfaceEdge1D | None],
	outDeviationProfile: Profile | None,
	outHeightProfiles: list[Profile],
	outResponseProfiles: list[Profile],
	outPathSegments: list[Segment3D] | None,
	diagScanSegments: list[Segment2D],
	diagSamplingAreas: list[Rectangle2D]
)

Parameters

Name Type Range Default Description
Input value inSurface Surface Surface to fit path to
Input value inFittingField PathFittingField Path fitting field
Input value inFittingFieldAlignment CoordinateSystem2D | None None Adjusts the fitting field to the position of the inspected object
Input value inScanStep float | None 0.0 - 5.0 Optional implicit conversion of the input path to an equidistant one
Input value inSamplingStep float | None 0.0 - None 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 int 1 - 5 The width of each scan field (in pixels)
Input value inSurfaceInterpolation InterpolationMethod InterpolationMethod.Bilinear Interpolation method used for extraction of surface points
Input value inEdgeScanParams EdgeScanParams3D EdgeScanParams3D(ProfileInterpolationMethod.Quadratic4, 1.0, 5.0, SurfaceEdgeTransition.LowToHigh) Parameters controlling the edge extraction process
Input value inEdgeSelection Selection Selection.Best Selection mode of edges
Input value inLocalBlindness LocalBlindness | None None Defines conditions in which weaker edges can be detected in the vicinity of stronger edges
Input value inMaxProfileGapWidth int | None 0 - 1 Maximal number of consecutive not existing profile points
Input value inMaxPathInterpolationLength int | None 0 - 1 Maximal number of consecutive points not found
Input value inMaxDeviationDelta float | None 0.0 - None Maximal difference between deviations of consecutive path points
Input value inMaxIncompleteness float 0.0 - 0.999 0.1 Maximal fraction of edge points not found
Output value outPath list[Point3D] | None Fitted path or nothing if the fitting failed
Output value outEdges list[SurfaceEdge1D | None] Found edges
Output value outDeviationProfile Profile | None Profile of distances between the actual path points and the corresponding reference path points
Output value outAlignedFittingField PathFittingField | None None Fitting field used; in the image coordinate system
Output value outHeightProfiles list[Profile] Extracted surface height profiles
Output value outResponseProfiles list[Profile] Profiles of the edge (derivative) operator response
Output value outPathSegments list[Segment3D] | None Segments of the fitted path or nothing if the fitting failed
Diagnostic input diagScanSegments list[Segment2D] Segments along which the scans were run
Diagnostic input diagSamplingAreas list[Rectangle2D] Areas from which the input image is sampled

Hardware Acceleration

This operation supports automatic parallelization for multicore and multiprocessor systems.