i.rgb.his <main>      GRASS Reference Manual	 <main> i.rgb.his



NAME
     i.rgb.his - Red-green-blue (rgb) to hue-intensity-saturation
     (his) function for image processing.
     (GRASS Image Processing Program)

SYNOPSIS
     i.rgb.his
     i.rgb.his help
     i.rgb.his red_input=name green_input=name blue_input=name
	hue_output=name intensity_output=name
     saturation_output=name

DESCRIPTION
     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.


     Parameters:

     red_input=name	      Input raster map layer representing
			      the red component.

     green_input=name	      Input raster map layer representing
			      the green component.

     blue_input=name	      Input raster map layer representing
			      the blue component.

     hue_output=name	      Output raster map layer
			      representing hue.

     intensity_output=name    Output raster map layer
			      representing intensity.

     saturation_output=name   Output raster map layer
			      representing saturation.

SEE ALSO
     hsv.rgb.sh, i.his.rgb, rgb.hsv.sh

AUTHOR
     David Satnik, GIS Laboratory, Central Washington University,

     with acknowledgements to Ali Vali, Univ. of Texas Space
     Research Center, for the core routine.



GRASS 5.0beta6	      GRASS Development Team			1