hus has 4 different normalization values associated with
 it. Each histogram bin is then normalized by each of the 4 different L2
 norms, resulting in a 4 times expansion of the number of bins. Finally,
 any bin whose value is bigger than &quot;clip&quot; is set to &quot;clip&quot;. Along
 boundaries the histograms with missing normalizations are set to 0.

 The computed features are NOT identical to those described in the CVPR05
 paper. Specifically, there is no Gaussian spatial window, and other mi