lowCorr( I1, I2, patchR, searchR,sigma, thr, show ) </strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre class="comment"> Calculate optical flow using cross-correlation.

 Calculate optical flow using correlation, followed by lucas &amp; kanade on
 aligned squares for subpixel accuracy.  Locally, the closest patch within
 some search radius is found.  The distance measure used is the euclidean
 distan