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Extends the input region so that it contains also all the pixels previously lying in its holes.

Name Type Range Description
inRegion Region Input region
inConnectivity RegionConnectivity Type of connectivity used for the region foreground
inMinHoleArea Integer 0 - Minimal area of a hole to be filled
inMaxHoleArea Integer* 0 - Maximal area of a hole to be filled
outRegion Region Output region


The operation extends a region to contain all pixels inside any of the region holes. Holes of a region are those connected areas of pixels not belonging to the region, that do not touch the boundary of the region frame.


Description of usage of this filter can be found in examples and tutorial: Capsules, Chocolate Cookies Inspection 3D, Molybdenum Foil, Mounts (Blob Analysis), Rubber Ring, Rubber Ring (Simple), Extracting Capsule Shape.

FillRegionHoles run on a sample region.


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

Complexity Level

This filter is available on Basic Complexity Level.

See Also