<p>In <a href="https://github.com/mlpack/mlpack/pull/696#discussion_r67201952">src/mlpack/methods/edge_boxes/feature_extraction_impl.hpp</a>:</p>
<pre style='color:#555'>> + // transform along rows
> + for (size_t y = 0; y < im.n_rows; y++)
> + {
> + f.subvec(0, im.n_cols - 1) = im.row(y).t();
> + arma::vec d = this->DistanceTransform1D(f, im.n_cols, inf);
> + im.row(y) = d.t();
> + }
> +}
> +
> +/* euclidean distance transform of binary image using squared distance */
> +template<typename MatType, typename CubeType>
> +MatType StructuredForests<MatType, CubeType>::
> +DistanceTransformImage(MatType const &im, double on)
> +{
> + //need a large value but not infinity.
> + double inf = 999999.99;
</pre>
<p>No need to redefine DBL_MAX it's defined in <code>cfloat</code>.</p>
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