1i.his.rgb(1) Grass User's Manual i.his.rgb(1)
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6 i.his.rgb - Hue-intensity-saturation (his) to red-green-blue (rgb)
7 raster map color transformation function.
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10 imagery
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13 i.his.rgb
14 i.his.rgb help
15 i.his.rgb hue_input=name intensity_input=name saturation_input=name
16 red_output=name green_output=name blue_output=name [--overwrite]
17 [--verbose] [--quiet]
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19 Flags:
20 --overwrite
21 Allow output files to overwrite existing files
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23 --verbose
24 Verbose module output
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26 --quiet
27 Quiet module output
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29 Parameters:
30 hue_input=name
31 Hue map name
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33 intensity_input=name
34 Intensity map name
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36 saturation_input=name
37 Saturation map name
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39 red_output=name
40 Output map representing the red
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42 green_output=name
43 Output map representing the green
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45 blue_output=name
46 Output map representing the blue
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49 i.his.rgb is an image processing program that processes three input
50 raster map layers as hue, intensity and saturation components and pro‐
51 duces three output raster map layers representing the red, green and
52 blue components of this data. The output raster map layers are created
53 by a standard hue-intensity-saturation (his) to red-green-blue (rgb)
54 color transformation. Each output raster map layer is given a linear
55 gray scale color table. The current geographic region and mask set‐
56 tings are respected.
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59 It is not possible to process three bands with i.his.rgb and then
60 exactly recover the original bands with i.rgb.his. This is due to loss
61 of precision because of integer computations and rounding. Tests have
62 shown that more than 70% of the original cell values will be reproduced
63 exactly after transformation in both directions and that 99% will be
64 within plus or minus 1. A few cell values may differ significantly
65 from their original values.
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68 hsv.rgb.sh
69 i.colors
70 i.rgb.his
71 r.colors
72 rgb.hsv.sh
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75 David Satnik, GIS Laboratory, Central Washington University
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77 with acknowledgements to Ali Vali, Univ. of Texas Space Research Cen‐
78 ter, for the core routine.
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80 Last changed: $Date: 2003-04-17 16:51:33 +0200 (Thu, 17 Apr 2003) $
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82 Full index
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84 © 2003-2008 GRASS Development Team
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88GRASS 6.3.0 i.his.rgb(1)