r.composite(1)

NAME
r.composite - Combines red, green and blue map layers into a single composite map layer.

KEYWORDS
raster

SYNOPSIS
r.composite
r.composite help
r.composite [-dc] red=string green=string blue=string [levels=integer] [lev_red=integer] [lev_green=integer] [lev_blue=integer] output=string [--overwrite]

  Flags:

-d  Dither

-c  Use closest color

--overwrite

  Parameters:

red=string
    Name of raster map layer to be used for

green=string
    Name of raster map layer to be used for

blue=string
    Name of raster map layer 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=string
    Name of raster map to contain results

DESCRIPTION
This program combines three raster map layers to form a composite RGB layer. For each layer, the corresponding component from the layer's color table is used (e.g. for the red layer, the red component is used, and so on). In general, the layers 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.

SEE ALSO
d.rast, d.rgb, r.blend, r.colors

AUTHOR
Glynn Clements

Last changed: $Date: 2005/03/01 20:18:14 $

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