FitArcToRidges


Performs a series of 1D ridge detections and finds an arc that best matches the detected points.

Applications:Precise detection of a thin arciform line, whose rough location is known beforehand.

Syntax

C++
C#
Python
 
def FitArcToRidges(
	inImage: Image,
	inFittingMap: ArcFittingMap,
	inRidgeScanParams: RidgeScanParams,
	inRidgeSelection: Selection,
	inMaxIncompleteness: float,
	inFittingMethod: CircleFittingMethod,
	/,
	*,
	inLocalBlindness: LocalBlindness | None = None,
	inOutlierSuppression: MEstimator | None = None
)
-> (
	outArc: Arc2D | None,
	outRidges: list[Ridge1D | None],
	outDeviationProfile: Profile | None,
	outInliers: list[Point2D],
	outBrightnessProfiles: list[Profile],
	outResponseProfiles: list[Profile]
)

Parameters

Name Type Range Default Description
Input value inImage Image Input image to fit arc to
Input value inFittingMap ArcFittingMap Input fitting map
Input value inRidgeScanParams RidgeScanParams Parameters controlling the ridge extraction process
Input value inRidgeSelection Selection Selection mode of ridges
Input value inLocalBlindness LocalBlindness | None None Defines conditions in which weaker ridges can be detected in the vicinity of stronger ridges
Input value inMaxIncompleteness float 0.0 - 0.999 Maximal fraction of ridge points not found
Input value inFittingMethod CircleFittingMethod Method used to fit an arc
Input value inOutlierSuppression MEstimator | None None Selects a method for ignoring incorrectly detected points
Output value outArc Arc2D | None Fitted arc or nothing if the fitting fails
Output value outRidges list[Ridge1D | None] Found ridges
Output value outDeviationProfile Profile | None Profile of distances between the actual arc points and the corresponding reference arc points
Output value outInliers list[Point2D] Points matching the fitting Arc
Output value outBrightnessProfiles list[Profile] Extracted image profiles
Output value outResponseProfiles list[Profile] Profiles of the ridge operator response

Hardware Acceleration

This operation supports automatic parallelization for multicore and multiprocessor systems.