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<h3 class="title"><a id="plug-in-dilate"></a>7.3. Dilate</h3>
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<a id="id3363938" class="indexterm"></a>
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<h4 class="title"><a id="id3364114"></a>Overview</h4>
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<p>
This filter is found in
<span class="guimenuitem">Image>Filters/Generic/<span class="accel">D</span>ilate</span>
</p>
<p>
This filter widens and enhances dark areas of the active layer or selection.
</p>
<p>
For every image pixel, it brings the pixel Value (luminosity) into line with
the lowest Value (the darkest) of the 8 neighbouring pixels (3x3 matrix). So,
a dark pixel is added around dark areas. An isolated pixel on a brighter
background will be changed to a big "pixel", composed of 9 pixels, and that will
create some noise in the image.
</p>
<div class="mediaobject">
<img src="../images/filters/filters-dilate-pixel.png" />
</div>
<p>
In this image, the studied pixel has a red border and the studied matrix has a
green border. I hope you have understood how to go on with the process and get a
3x3 pixel block: when the "I" pixel is inside the green border, the studied pixel
turns to black.
</p>
<p>
A larger dark area will dilate by one pixel in all directions:
</p>
<div class="mediaobject">
<img src="../images/filters/filters-dilate-zone.png" />
</div>
<p>
The filter was applied 3 times.
</p>
<p>
On more complex images, dark areas are widenned and enhanced the same, and
somewhat pixellated. Here, the filter was applied 3 times:
</p>
<div class="mediaobject">
<img src="../images/filters/filters-dilate-image.png" />
</div>
<p>
Of course, if background is darker than foreground, it will cover the whole image.
</p>
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<img src="../images/filters/filters-dilate-pixel.png" />
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<img src="../images/filters/filters-dilate-zone.png" />
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<img src="../images/filters/filters-dilate-image.png" />
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<h4 class="title"><a id="id3363867"></a>Options</h4>
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This filter has no options.
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<h4 class="title"><a id="id3364214"></a>Examples</h4>
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<dl>
<dt>
<span class="term">Dilate text</span>
</dt>
<dd>
<div class="mediaobject">
<img src="../images/filters/examples/dilate-text.png" />
</div>
</dd>
<dt>
<span class="term">Dilate neon effect</span>
</dt>
<dd>
<div class="mediaobject">
<img src="../images/filters/examples/dilate-neon.png" />
</div>
</dd>
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