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i.his.rgb
Langue: en
Version: 146621 (fedora - 04/07/09)
Section: 1 (Commandes utilisateur)
NAME
i.his.rgb - Hue-intensity-saturation (his) to red-green-blue (rgb) raster map color transformation function.KEYWORDS
imagerySYNOPSIS
i.his.rgbi.his.rgb help
i.his.rgb hue_input=name intensity_input=name saturation_input=name red_output=name green_output=name blue_output=name [--overwrite] [--verbose] [--quiet]
Flags:
- --overwrite
Allow output files to overwrite existing files- --verbose
Verbose module output- --quiet
Quiet module output
Parameters:
- hue_input=name
Hue map name- intensity_input=name
Intensity map name- saturation_input=name
Saturation map name- red_output=name
Output map representing the red- green_output=name
Output map representing the green- blue_output=name
Output map representing the blue
DESCRIPTION
i.his.rgb is an image processing program that processes three input raster map layers as hue, intensity and saturation components and produces three output raster map layers representing the red, green and blue components of this data. The output raster map layers are created by a standard hue-intensity-saturation (his) to red-green-blue (rgb) color transformation. Each output raster map layer is given a linear gray scale color table. The current geographic region and mask settings are respected.NOTES
It is not possible to process three bands with i.his.rgb and then exactly recover the original bands with i.rgb.his. This is due to loss of precision because of integer computations and rounding. Tests have shown that more than 70% of the original cell values will be reproduced exactly after transformation in both directions and that 99% will be within plus or minus 1. A few cell values may differ significantly from their original values.SEE ALSO
hsv.rgb.shi.colors
i.rgb.his
r.colors
rgb.hsv.sh
AUTHOR
David Satnik, GIS Laboratory, Central Washington Universitywith acknowledgements to Ali Vali, Univ. of Texas Space Research Center, for the core routine.
Last changed: $Date: 2003-04-17 16:51:33 +0200 (Thu, 17 Apr 2003) $
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