<?xml version="1.0" encoding="utf-8"?>
<executable>
  <category>
  Filtering.Morphology
  </category>
  <title>
  Grayscale Fill Hole
  </title>
  <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 GrayscaleGeodesicErodeImageFilter.  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.
  </description>
  <version>1.0</version>
  <documentationurl></documentationurl>
  <license></license>
  <contributor>Bill Lorensen</contributor>

  <parameters>
    <label>IO</label>
    <description>Input/output parameters</description>
    <image>
      <name>inputVolume</name>
      <label>Input Volume</label>
      <channel>input</channel>
      <index>0</index>
      <description>Input volume to be filtered</description>
    </image>
    <image>
      <name>outputVolume</name>
      <label>Output Volume</label>
      <channel>output</channel>
      <index>1</index>
      <description>Output filtered</description>
    </image>
  </parameters>

</executable>
