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i.his.rgb(1)		    GRASS GIS User's Manual		  i.his.rgb(1)

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=nameA [required]
	   Name	of input raster	map (hue)

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

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

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

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

       blue=nameA [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  pro-
       duces  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 set-
       tings are respected.

NOTES
       It is not possible to process three bands with i.his.rgb	and  then  ex-
       actly  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  Cen-
       ter, for	the core routine.

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

       Main  index | Imagery index | Topics index | Keywords index | Graphical
       index | Full index

       A(C) 2003-2021 GRASS Development	Team, GRASS GIS	7.8.6 Reference	Manual

GRASS 7.8.6							  i.his.rgb(1)

NAME | KEYWORDS | SYNOPSIS | DESCRIPTION | NOTES | SEE ALSO | AUTHOR | SOURCE CODE

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