1i.his.rgb(1)                  Grass User's Manual                 i.his.rgb(1)
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NAME

6       i.his.rgb  - Transforms raster maps from HIS (Hue-Intensity-Saturation)
7       color space to RGB (Red-Green-Blue) color space.
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KEYWORDS

10       imagery, color transformation, RGB, HIS, IHS
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SYNOPSIS

13       i.his.rgb
14       i.his.rgb --help
15       i.his.rgb hue=name intensity=name saturation=name  red=name  green=name
16       blue=name  [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]
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18   Flags:
19       --overwrite
20           Allow output files to overwrite existing files
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22       --help
23           Print usage summary
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25       --verbose
26           Verbose module output
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28       --quiet
29           Quiet module output
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31       --ui
32           Force launching GUI dialog
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34   Parameters:
35       hue=name [required]
36           Name of input raster map (hue)
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38       intensity=name [required]
39           Name of input raster map (intensity)
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41       saturation=name [required]
42           Name of input raster map (saturation)
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44       red=name [required]
45           Name for output raster map (red)
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47       green=name [required]
48           Name for output raster map (green)
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50       blue=name [required]
51           Name for output raster map (blue)
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DESCRIPTION

54       i.his.rgb  is  an  image  processing program that processes three input
55       raster map layers as hue, intensity and saturation components and  pro‐
56       duces  three  output  raster map layers representing the red, green and
57       blue components of this data.  The output raster map layers are created
58       by  a  standard  hue-intensity-saturation (HIS) to red-green-blue (RGB)
59       color transformation.  Each output raster map layer is given  a  linear
60       gray  scale  color  table.  The current geographic region and mask set‐
61       tings are respected.
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NOTES

64       It is not possible to process  three  bands  with  i.his.rgb  and  then
65       exactly recover the original bands with i.rgb.his.  This is due to loss
66       of precision because of integer computations and rounding.  Tests  have
67       shown that more than 70% of the original cell values will be reproduced
68       exactly after transformation in both directions and that  99%  will  be
69       within  plus  or  minus  1.  A few cell values may differ significantly
70       from their original values.
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SEE ALSO

73        i.rgb.his, r.colors
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AUTHOR

76       David Satnik, GIS Laboratory, Central Washington University
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78       with acknowledgements to Ali Vali, Univ. of Texas Space  Research  Cen‐
79       ter, for the core routine.
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SOURCE CODE

82       Available at: i.his.rgb source code (history)
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84       Main  index | Imagery index | Topics index | Keywords index | Graphical
85       index | Full index
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87       © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual
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91GRASS 7.8.2                                                       i.his.rgb(1)
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