NAME
r.composite - Combines red, green and blue map layers into a single composite map layer.
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
Flags:
- -d
- Dither
- -c
- Use closest color
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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