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<div class='toc'>
<h3>Table of Contents</h3><ul><li class="level1"><a href="#tut.covdet.extract">Extracting frames and descriptors</a></li>
<li class="level1"><a href="#tut.covdet.frames">Understanding feature frames</a></li>
<li class="level1"><a href="#tut.covdet.affine">Affine adaptation</a></li>
<li class="level1"><a href="#tut.covdet.ori">Feature orientation</a></li>
<li clas