[GRASS-dev] [GRASS GIS] #774: i.rgb.his, i.his.rgb, d.his support for >8 bit

GRASS GIS trac at osgeo.org
Wed Feb 7 08:23:23 PST 2018

#774: i.rgb.his, i.his.rgb, d.his support for >8 bit
  Reporter:  hamish       |      Owner:  grass-dev@…
      Type:  enhancement  |     Status:  new
  Priority:  normal       |  Milestone:  7.4.1
 Component:  Raster       |    Version:  svn-develbranch6
Resolution:               |   Keywords:  i.rgb.his, i.his.rgb, d.his
       CPU:  All          |   Platform:  All

Comment (by Nikos Alexandris):

 The statistics in https://trac.osgeo.org/grass/ticket/774#comment:13, show
 that going from either an 8-bit or 16-bit RGB to HIS and back to RGB,
 figures are not scrambled. Some rounding applies, as exemplified in in the
 same stats above.  Even visually, I confirmed (not documented here) that
 the old and the new versions perform the same.

 It will break i.pansharpen, unless i.pansharpen treats intensity ranging
 in [0,1].

 Nevertheless, another set of tests would be certainly good to have to
 confirm the correctness of the new version.

Ticket URL: <https://trac.osgeo.org/grass/ticket/774#comment:17>
GRASS GIS <https://grass.osgeo.org>

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