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r.composite.1grass
Langue: en
Version: 337464 (ubuntu - 24/10/10)
Section: 1 (Commandes utilisateur)
NAME
r.composite - Combines red, green and blue raster maps into a single composite raster map.KEYWORDS
raster, compositeSYNOPSIS
r.compositer.composite help
r.composite [-dc] red=name green=name blue=name [levels=integer] [lev_red=integer] [lev_green=integer] [lev_blue=integer] output=name [--overwrite] [--verbose] [--quiet]
Flags:
- -d
Dither- -c
Use closest color- --overwrite
Allow output files to overwrite existing files- --verbose
Verbose module output- --quiet
Quiet module output
Parameters:
- red=name
Name of raster map to be used for- green=name
Name of raster map to be used for- blue=name
Name of raster map to be used for- levels=integer
Number of levels to be used for each component
Options: 1-256
Default: 32- lev_red=integer
Number of levels to be used for
Options: 1-256- lev_green=integer
Number of levels to be used for
Options: 1-256- lev_blue=integer
Number of levels to be used for
Options: 1-256- output=name
Name for output raster map
DESCRIPTION
This program combines three raster maps to form a composite RGB map. For each input map layer, the corresponding component from the map's color table is used (e.g. for the red map, the red component is used, and so on). In general, the maps should use a gray-scale color table.NOTES
The default number of intensity levels for each component is 32, resulting in a total of 32768 possible colors (equivalent to 15 bits per pixel). If significantly more levels than this are used, not only will r.composite take longer to run, but displaying the resulting layer with d.rast will also be significantly slower.Floyd-Steinberg dithering is optionally used with the -d flag.
EXAMPLE
Creating a composite RGB raster using 32 color levels per layer, with dithering:r.composite -d red=elevation.r green=elevation.g blue=elevation.b output=elev.composite
SEE ALSO
d.rast, d.rgb, r.blend, r.colorsWikipedia Entry: Floyd-Steinberg dithering
AUTHOR
Glynn ClementsLast changed: $Date: 2008-02-26 20:04:18 +0100 (mar, 26 feb 2008) $
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