i.quantize - An interactive imagery function that
creates a raster map layer whose color table is based on
the red, green, and blue color values present in existing,
user-specified imagery group files.
(GRASS Image Processing Program)
i.quantize is an interactive imagery function that
allows the user to create a new raster map layer whose
color table values are based on the red, green, and blue
color values present in (as many as) three raster map
layers in an imagery group.
The user is first asked to enter the name of the imagery
group from whose map layers red, green, and blue color
values are to be extracted. The user is then shown a
listing of imagery files in the specified group, and is
asked to indicate which files in the group are to be used
for red, green, and blue colors in the new map layer. Each
color (red, green, and blue) must be specified once and
The user is also asked to assign a name to the new raster map layer output.
This program is interactive and requires no command line arguments.
The input files must ALL be within the range of 0-255.
GRASS Tutorial: Image Pro
Paul Heckbert, 1982.
Color Image Quantization for Frame Buffer Display,
SIGGRAPH '82 Proceedings, page 297.
U.S. Army Construction Engineering