r.composite(1)

1r.composite(1)                Grass User's Manual               r.composite(1)
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NAME

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

10       raster
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SYNOPSIS

13       r.composite
14       r.composite help
15       r.composite [-dc] red=string green=string blue=string  [levels=integer]
16       [lev_red=integer]     [lev_green=integer]     [lev_blue=integer]   out‐
17       put=string  [--overwrite]  [--verbose]  [--quiet]
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19   Flags:
20       -d
21           Dither
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23       -c
24           Use closest color
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26       --overwrite
27           Allow output files to overwrite existing files
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29       --verbose
30           Verbose module output
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32       --quiet
33           Quiet module output
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35   Parameters:
36       red=string
37           Name of raster map layer to be used for
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39       green=string
40           Name of raster map layer to be used for
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42       blue=string
43           Name of raster map layer to be used for
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45       levels=integer
46           Number of levels to be used for each component
47           Options: 1-256
48           Default: 32
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50       lev_red=integer
51           Number of levels to be used for
52           Options: 1-256
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54       lev_green=integer
55           Number of levels to be used for
56           Options: 1-256
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58       lev_blue=integer
59           Number of levels to be used for
60           Options: 1-256
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62       output=string
63           Name of raster map to contain results
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DESCRIPTION

66       This program combines three raster maps to form a  composite  RGB  map.
67       For  each  input  map layer, the corresponding component from the map's
68       color table is used (e.g. for the red map, the red component  is  used,
69       and so on). In general, the maps should use a gray-scale color table.
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NOTES

72       The  default  number  of  intensity  levels  for  each component is 32,
73       resulting in a total of 32768 possible colors (equivalent  to  15  bits
74       per  pixel).  If significantly more levels than this are used, not only
75       will r.composite take longer to run, but displaying the resulting layer
76       with d.rast will also be significantly slower.
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78       Floyd-Steinberg dithering is optionally used with the -d flag.
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EXAMPLE

81       Creating  a  composite RGB raster using 32 color levels per layer, with
82       dithering:
83       r.composite -d red=elevation.r green=elevation.g blue=elevation.b  out‐
84       put=elev.composite
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AUTHOR

93       Glynn Clements
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95       Last changed: $Date: 2008-02-26 20:05:33 +0100 (Tue, 26 Feb 2008) $
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97       Full index
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99       © 2003-2008 GRASS Development Team
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103GRASS 6.3.0                                                     r.composite(1)