[pdal-commits] [PDAL/PDAL] c9216d: Add Extended Local Maximum (ELM) filter

[GitHub]

  Branch: refs/heads/add-elm-filter
  Home:   https://github.com/PDAL/PDAL
  Commit: c9216dfdd07f6c316130318628a1ba9df1695fdd
      https://github.com/PDAL/PDAL/commit/c9216dfdd07f6c316130318628a1ba9df1695fdd
  Author: Bradley J Chambers <brad.chambers at gmail.com>
  Date:   2017-04-05 (Wed, 05 Apr 2017)

  Changed paths:
    M doc/references.rst
    A doc/stages/filters.elm.rst
    A filters/ELMFilter.cpp
    A filters/ELMFilter.hpp
    M pdal/StageFactory.cpp

  Log Message:
  -----------
  Add Extended Local Maximum (ELM) filter

Based off the work of Chen, et al. In the original work, the authors used ELM
to generate grid minimums that were resistent to low outliers in ground
segmentation and DTM generation. We implement here as a standalone filter that
simply marks the low points as noise. Downstream filtering stages can ignore,
extract, or handle these noise points as they see fit.