NAME

       i.his.rgb    -   Transforms   raster   maps  from  HIS  (Hue-Intensity-Saturation)  color  space  to  RGB
       (Red-Green-Blue) color space.

KEYWORDS

       imagery, color transformation, RGB, HIS, IHS

SYNOPSIS

       i.his.rgb
       i.his.rgb --help
       i.his.rgb hue=name intensity=name saturation=name red=name green=name blue=name  [--overwrite]   [--help]
       [--verbose]  [--quiet]  [--ui]

   Flags:
       --overwrite
           Allow output files to overwrite existing files

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       hue=name [required]
           Name of input raster map (hue)

       intensity=name [required]
           Name of input raster map (intensity)

       saturation=name [required]
           Name of input raster map (saturation)

       red=name [required]
           Name for output raster map (red)

       green=name [required]
           Name for output raster map (green)

       blue=name [required]
           Name for output raster map (blue)

DESCRIPTION

       i.his.rgb  is  an image processing program that processes three input raster map layers as hue, intensity
       and saturation components and produces three output raster map layers representing  the  red,  green  and
       blue   components   of   this   data.    The   output  raster  map  layers  are  created  by  a  standard
       hue-intensity-saturation (HIS) to red-green-blue (RGB) color  transformation.   Each  output  raster  map
       layer  is  given  a  linear  gray scale color table.  The current geographic region and mask settings are
       respected.

NOTES

       It is not possible to process three bands with i.his.rgb and then exactly recover the original bands with
       i.rgb.his.   This  is  due to loss of precision because of integer computations and rounding.  Tests have
       shown that more than 70% of the original cell values will be reproduced exactly after  transformation  in
       both  directions and that 99% will be within plus or minus 1.  A few cell values may differ significantly
       from their original values.

SEE ALSO

        i.rgb.his, r.colors

AUTHOR

       David Satnik, GIS Laboratory, Central Washington University

       with acknowledgements to Ali Vali, Univ. of Texas Space Research Center, for the core routine.

SOURCE CODE

       Available at: i.his.rgb source code (history)

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual