<div class="figure" style="text-align: center">
<img src="figures/04_focal_example.png" alt="Input raster (left) and resulting output raster (right) due to a focal operation - finding the minimum value in 3-by-3 moving windows." width="475" />
<p class="caption">(\#fig:focal-example)Input raster (left) and resulting output raster (right) due to a focal operation - finding the minimum value in 3-by-3 moving windows.</p>
</div>