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FIL.BottomHatRegion

Performs a morphological black top hat (bottom hat) operation on a region using a predefined kernel.

Namespace:FilNet
Assembly:FIL.NET.dll

Syntax

C++
C#
 
public static void BottomHatRegion
(
	FilNet.Region inRegion,
	FilNet.KernelShape inKernel,
	int inRadiusX,
	int? inRadiusY,
	FilNet.Region outRegion
)

Parameters

Name Type Range Default Description
inRegionFilNet.RegionInput region.
inKernelFilNet.KernelShapeKernel shape (predefined).
inRadiusXint<0, INF>1Nearly half of the kernel's width (2*R+1). Default value: 1.
inRadiusYint?<0, INF>Nearly half of the kernel's height (2*R+1), or same as inRadiusX. Default value: ftl::NIL.
outRegionFilNet.RegionOutput region.

Description

Extracts small parts which do not belong to region. Uses predefined kernels.

Is performed by running consecutively two filters. CloseRegion to remove small holes from region and RegionDifference to remove rest of the region.

Examples

Top Hat used to remove bigger parts of which do not belong to region. Used parameters inKernel=Ellipse and inRadiusX=5. Region marked white. Source image on the left and result on the right.

Errors

List of possible exceptions:

Error type Description
DomainError Unsupported kernel in BottomHatRegion.

Function Overrides

See also