/p><p>
PERM = <a href="vl_hog.html">VL_HOG</a>('permutation') returns the left-right permutation
to apply to each HOG cell to flip it.
</p><p>
IMAGE = <a href="vl_hog.html">VL_HOG</a>('render', HOG) returns an IMAGE containing an
iconic representation of the array of cells HOG.
</p><p>
Options:
</p><dl><dt>
Variant
<span class="defaults">'UoCTTI'</span></dt><dd><p>
Choose a HOG variant: 'UoCTTI' or 'DalalTriggs'.
</p></dd><dt>
NumOrientations
<span class="defaults">9</span></dt><dd><p>
Choose a number of un