 parameter is <code/>PatchResolution</code>. If this is
equal to $w$, then the patch has a side of $2w+1$ pixels.  (hence the
sampling step in the normalised frame is given by
<code/>PatchRelativeExtent</code>/<code/>PatchResolution</code>).
Extracting higher resolution patches may be needed for larger extent
and smaller smoothing. A good setting for this parameter may be
<code/>PatchRelativeExtent</code>/<code/>PatchRelativeSigma</code>.</p>

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