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=string intensity_input=string satura‐
16 tion_input=string red_output=string green_output=string blue_out‐
17 put=string [--overwrite]
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19 Flags:
20 --overwrite
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22 Parameters:
23 hue_input=string
24 hue map name
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26 intensity_input=string
27 intensity map name
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29 saturation_input=string
30 saturation map name
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32 red_output=string
33 output map representing the red
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35 green_output=string
36 output map representing the green
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38 blue_output=string
39 output map representing the blue
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42 i.his.rgb is an image processing program that processes three input
43 raster map layers as hue, intensity and saturation components and pro‐
44 duces three output raster map layers representing the red, green and
45 blue components of this data. The output raster map layers are created
46 by a standard hue-intensity-saturation (his) to red-green-blue (rgb)
47 color transformation. Each output raster map layer is given a linear
48 gray scale color table. The current geographic region and mask set‐
49 tings are respected.
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52 It is not possible to process three bands with i.his.rgb and then
53 exactly recover the original bands with i.rgb.his. This is due to loss
54 of precision because of integer computations and rounding. Tests have
55 shown that more than 70% of the original cell values will be reproduced
56 exactly after transformation in both directions and that 99% will be
57 within plus or minus 1. A few cell values may differ significantly
58 from their original values.
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61 hsv.rgb.sh
62 i.colors
63 i.rgb.his
64 r.colors
65 rgb.hsv.sh
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68 David Satnik, GIS Laboratory, Central Washington University
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70 with acknowledgements to Ali Vali, Univ. of Texas Space Research Cen‐
71 ter, for the core routine.
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73 Last changed: $Date: 2003/04/17 14:48:52 $
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75 Full index
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79GRASS 6.2.2 i.his.rgb(1)