i.his.rgb(1grass) GRASS GIS User's Manual i.his.rgb(1grass)
NAME
i.his.rgb - Transforms raster maps from HIS (Hue-Intensity-Saturation)
color space to RGB (Red-Green-Blue) color space.
KEYWORDS
imagery, color transformation, RGB, HIS, IHS
SYNOPSIS
i.his.rgb
i.his.rgb --help
i.his.rgb hue=name intensity=name saturation=name red=name green=name
blue=name [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
--overwrite
Allow output files to overwrite existing files
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog
Parameters:
hue=name [required]
Name of input raster map (hue)
intensity=name [required]
Name of input raster map (intensity)
saturation=name [required]
Name of input raster map (saturation)
red=name [required]
Name for output raster map (red)
green=name [required]
Name for output raster map (green)
blue=name [required]
Name for output raster map (blue)
DESCRIPTION
i.his.rgb is an image processing program that processes three input
raster map layers as hue, intensity and saturation components and pro-
duces 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 set-
tings are respected.
NOTES
It is not possible to process three bands with i.his.rgb and then ex-
actly 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
i.rgb.his, r.colors
AUTHOR
David Satnik, GIS Laboratory, Central Washington University
with acknowledgements to Ali Vali, Univ. of Texas Space Research Cen-
ter, for the core routine.
SOURCE CODE
Available at: i.his.rgb source code (history)
Accessed: unknown
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GRASS 7.8.7 i.his.rgb(1grass)
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