<p>In <a href="https://github.com/mlpack/mlpack/pull/683#discussion_r66466139">src/mlpack/methods/edge_boxes/feature_extraction_impl.hpp</a>:</p>
<pre style='color:#555'>> + }
> + return OutImage;
> +}
> +
> +template<typename MatType, typename CubeType>
> +CubeType StructuredForests<MatType, CubeType>::
> +RGB2LUV(CubeType& InImage)
> +{
> + //assert type is double or float.
> + double a, y0, maxi;
> + a = pow(29.0, 3) / 27.0;
> + y0 = 8.0 / a;
> + maxi = 1.0 / 270.0;
> +
> + arma::vec table(1025);
> + for (size_t i = 0; i < 1025; ++i)
</pre>
<p>you can call table.n_elems, this way you only need to change the value 1025 once only(if you need to change it in the future)</p>
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