Back to FabImage Library website

You are here: Start » Function Reference » Region » Region Global Transforms » RegionInteriors

RegionInteriors


Header: FIL.h
Namespace: fil
Module: FoundationBasic

Removes boundary pixels from a region.

Syntax

C++
C#
 
void fil::RegionInteriors
(
	const fil::Region& inRegion,
	fil::RegionConnectivity::Type inConnectivity,
	fil::Region& outRegion
)

Parameters

Name Type Default Description
Input value
 inRegion const Region& Input region
Input value
 inConnectivity RegionConnectivity::Type Type of connectivity used for the region foreground
Output value
 outRegion Region& Output region

Description

The operation removes all boundary pixels from the region (thus leaving only the interior pixels). The definition of boundary pixel depends on the inConnectivity value:

  • If inConnectivity is set to Four directions, boundary pixels are those having at least one of the neighbours in four major directions (up, down, left, right) not contained in the region
  • If inConnectivity is set to Eight directions, boundary pixels are those having at least one of the neighbours in all eight directions (four major + four diagonal) not contained in the region

Examples

RegionInteriors run on a sample region.

Remarks

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

Errors

List of possible exceptions:

Error type Description
DomainError Not supported connectivity type in RegionInteriors.

See Also