 
NAME
r.rgb  - Splits a raster map into red, green and blue maps.
KEYWORDS
raster, 
RGB, 
separate, 
split
SYNOPSIS
r.rgb
r.rgb --help
r.rgb input=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:
- input=name [required]
- Name of input raster map
- red=name
- Red channel raster map name
- green=name
- Green channel raster map name
- blue=name
- Blue channel raster map name
 
r.rgb generates separate red, green and blue maps from a
raster map and its associated color table (grey255).
g.region raster=elevation -p
r.rgb input=elevation red=elevation.r green=elevation.g blue=elevation.b
In this case r.rgb produces in the current mapset three new
raster maps - 'elevation.r', 'elevation.g', 'elevation.b'.

r.composite,
r.blend,
r.colors,
r.mapcalc
Glynn Clements
SOURCE CODE
  Available at:
  r.rgb source code
  (history)
  Latest change: Thursday Feb 03 11:10:06 2022 in commit: 547ff44e6aecfb4c9cbf6a4717fc14e521bec0be
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GRASS Development Team,
GRASS GIS 8.4.1 Reference Manual