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FIL.SplitRegionIntoComponents

Splits a region into an array of regions. Operates by merging blobs in accordance to the inMaxDistance parameter.

Namespace:FilNet
Assembly:FIL.NET.dll

Syntax

C++
C#
 
public static void SplitRegionIntoComponents
(
	FilNet.Region inRegion,
	float inDistanceBalance,
	int inMinComponentArea,
	bool inRemoveBoundaryBlobs,
	IList<FilNet.Region> outComponents
)

Parameters

Name Type Range Default Description
inRegionFilNet.RegionInput region.
inDistanceBalancefloat<-1.0f, 1.0f>Defines how much important the distance between regions in x coordinate is according to distance in y coordinate.
inMinComponentAreaint<0, INF>1Minimal area of a resulting component. Default value: 1.
inRemoveBoundaryBlobsboolFalseFlag indicating whether the blobs on border of the input region should be removed or not. Default value: False.
outComponentsSystem.Collections.Generic.IList<FilNet.Region>

Description

The filter splits the input region into blobs and iteratively joins some of them into bigger components. Only blobs that are distant from each other by at most inMaxDistance can be joined. The joining order is determined based on modified distance between two blobs, so the closest ones are joined first. This modified distance between two blobs is computed as follows:
  1. The shortest segment connecting two blobs is computed.
  2. The segment is scaled by \[ 0.5 \cdot (1 + inDistanceBalance) \] along the X axis and by \[ 0.5 \cdot (1 - inDistanceBalance) \] along the Y axis.
  3. Finally the length of the so scaled segment is computed.
Every region being a result of such blob joining has to satisfy conditions defined by inMaxJointDiameter, inMaxJointWidth and inMaxJointHeight parameters. Finally, only regions with appropriate area between inMinComponentArea and inMaxComponentArea are parts of the output component table.

Examples

SplitRegionIntoComponents used with inMaxDistance = 50.

Remarks

This filter is mostly used in Blob Analysis Technique please refer to our Machine Vision Guide - Blob Analysis article.

Hardware Acceleration

This operation supports automatic parallelization for multicore and multiprocessor systems.

Hardware acceleration settings may be manipulated with Settings class.

Function Overrides

See also