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i.rgb.his.1grass - Man Page

Transforms raster maps from RGB (Red-Green-Blue) color space to HIS (Hue-Intensity-Saturation) color space.


imagery, color transformation, RGB, HIS, IHS


i.rgb.his --help
i.rgb.his red=name green=name blue=name hue=name intensity=name saturation=name  [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]



Allow output files to overwrite existing files


Print usage summary


Verbose module output


Quiet module output


Force launching GUI dialog


red=name [required]

Name of input raster map (red)

green=name [required]

Name of input raster map (green)

blue=name [required]

Name of input raster map (blue)

hue=name [required]

Name for output raster map (hue)

intensity=name [required]

Name for output raster map (intensity)

saturation=name [required]

Name for output raster map (saturation)


i.rgb.his is an image processing program that processes three input raster map layers as red, green, and blue components and produces three output raster map layers representing the hue, intensity, and saturation of the data.  The output raster map layers are created by a standard red-green-blue (RGB) to hue-intensity-saturation (HIS) color transformation.  Each output raster map layer is given a linear gray scale color table.  The current geographic region definition and mask settings are respected.

See Also



David Satnik, GIS Laboratory, Central Washington University,
with acknowledgements to Ali Vali, Space Research Center, for the core routine.

Source Code

Available at: i.rgb.his source code (history)

Accessed: Tuesday May 14 13:41:46 2024

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