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<h3 class="title"><a id="plug-in-gauss"></a>2.3. Gaussian Blur</h3>
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<p>
This filter is found in
<span class="guimenuitem">Image>Filters/Blur/Gaussian Blur</span>
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<p>
The IIR Gaussian Blur plug-in acts on each pixel of the
active layer or selection, setting its Value to the average
of all pixel Values present in a radius defined in the
dialog. A higher Value will produce a higher amount of
blur. The blur can be set to act in one direction more than
the other by clicking the Chain Button so that it is
broken, and altering the radius. GIMP supports two
implementations of Gaussian Blur: IIR G.B. and RLE G.B. They
both produce the same results, but each one can be faster in
some cases.
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<span class="term">Blur Radius</span>
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Here you can set the blur intensity. By altering the ratio of horizontal to vertical blur, you can
give the effect of a motion blur. You can choose the unit with the drop list.
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<span class="term">Blur Method</span>
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<span class="guilabel">IIR</span>: IIR stands for "Infinite Impulse
Responce".This blur works best for large radius values and
for images which are not computer generated.
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<p>
<span class="guilabel">RLE</span>: RLE stands for run-length
encoding. RLE Gaussian Blur is best used on
computer-generated images or those with large areas of
constant intensity.
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