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[[Documentation-3.6|Return to Slicer 3.6 Documentation]]
__NOTOC__
===Module Name===
Grayscale Fill Hole

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== General Information ==

===Module Type & Category===

Type: CLI

Category: Filtering Morphology

===Authors, Collaborators & Contact===
* Author: Bill Lorensen
* Contact: bill.lorensen at gmail.com

===Module Description===
GrayscaleFillholeImageFilter fills holes in a grayscale
image. Holes are local minima in the grayscale topography that are not
connected to boundaries of the image. Gray level values adjacent to a
hole are extrapolated across the hole. This filter is used to smooth
over local minima without affecting the values of local maxima. If you
take the difference between the output of this filter and the original
image (and perhaps threshold the difference above a small value), you'll
obtain a map of the local minima. This filter uses the
itkGrayscaleGeodesicErodeImageFilter. It provides its own input as the
'mask' input to the geodesic erosion. The 'marker' image for the
geodesic erosion is constructed such that boundary pixels match the
boundary pixels of the input image and the interior pixels are set to
the maximum pixel value in the input image. Geodesic morphology and the
Fillhole algorithm is described in Chapter 6 of Pierre Soille's book
'Morphological Image Analysis: Principles and Applications', Second
Edition, Springer, 2003. A companion filter, Grayscale Grind Peak,
removes peaks in grayscale images.

== Usage ==
<pre>
GrayscaleFillHoleImageFilter.exe <std::string> <std::string>
Where:

<std::string>
(required) Input volume to be filtered

<std::string>
(required) Output filtered
</pre>

== Development ==

===Source code & documentation===

Source Code: [http://www.na-mic.org/ViewVC/index.cgi/trunk/Applications/CLI/]

Documentation:

== More Information ==

===Acknowledgment===
This work is part of the National Alliance for Medical Image
Computing (NAMIC), funded by the National Institutes of Health
through the NIH Roadmap for Medical Research, Grant U54 EB005149.
Information on the National Centers for Biomedical Computing
can be obtained from [http://www.ncbcs.org/ National Centers for Biomedical Computing].

===References===

Modules:GrayscaleFillHole-Documentation-3.6 - Revision history

Lorensen: Created page with 'Return to Slicer 3.6 Documentation __NOTOC__ ===Module Name=== Grayscale Fill Hole {| |Caption 1 |[[Image:screens…'

Lorensen: Created page with 'Return to Slicer 3.6 Documentation NOTOC ===Module Name=== Grayscale Fill Hole {| |Caption 1 |[[Image:screens…'