<p>In <a href="https://github.com/mlpack/mlpack/pull/703#discussion_r69641472">src/mlpack/methods/edge_boxes/feature_extraction.hpp</a>:</p>
<pre style='color:#555'>&gt; +  void MaxAndLoc(CubeType &amp;mag, arma::umat &amp;Location, MatType&amp; MaxVal) const;
&gt; +
&gt; +  void Histogram(const MatType&amp; Magnitude,
&gt; +                 const MatType&amp; Orientation, 
&gt; +                 const size_t downscale,
&gt; +                 const size_t interp,
&gt; +                 CubeType&amp; HistArr);
&gt; + 
&gt; +  void ViewAsWindows(const CubeType&amp; channels, const arma::umat&amp; loc,
&gt; +                     CubeType&amp; features);
&gt; +
&gt; +  void GetRegFtr(const CubeType&amp; channels, const arma::umat&amp; loc,
&gt; +                 CubeType&amp; RegFtr);
&gt; +
&gt; +  void GetSSFtr(const CubeType&amp; channels, const arma::umat&amp; loc,
&gt; +                 CubeType SSFtr);
</pre>
<p>I was wondering, why I don't see any similarity features, turns out we missed a reference here.</p>

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