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r.composite

man page of r.composite

r.composite: Combines red, green and blue raster maps into a single composite raster map.

NAME
r.composite - Combines red, green and blue raster maps into a single composite raster map.

KEYWORDS

raster, composite

SYNOPSIS

r.composite r.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.colors Wikipedia Entry: Floyd-Steinberg dithering

AUTHOR

Glynn Clements Last changed: $Date: 2008-02-26 20:04:18 +0100 (Tue, 26 Feb 2008) $ Full index (C) 2003-2010 GRASS Development Team R.COMPOSITE(1)
 
 
 

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