Plan 9 - man page for quantize (plan9 section 9)
|Linux & Unix Commands - Search Man Pages
3to1, mcut, improve, quantize, dither - picture color compression
fb/3to1 [ -e ] colormap [ input ]
fb/mcut [ input ]
fb/improve colormap [ input ]
fb/quantize [ input ]
fb/dither [ input ]
3to1 approximates the full color (3 bytes per pixel) or mapped (1 byte per pixel, possibly
with a colormap) input picture file in one byte per pixel using the given colormap. If no
input file is named, the picture is read from standard input. The -e option suppresses
the default error-diffusion dither.
Mcut writes a color map, suitable for use by 3to1 on its standard output. The color map
is computed using the median-cut algorithm and represents reasonably well, but not neces-
sarily optimally, the colors of the input picture.
Improve reads a color map and a picture and writes on standard output a new color map that
better represents the colors of the picture. Multiple passes of improve may produce bet-
ter and better color maps.
Quantize is an rc script that packages all of the above to compress the full-color input
image to one byte per pixel.
Dither likewise compresses full-color images to one byte per pixel. It uses a fixed color
map that allows a speedy algorithm; quantize instead runs slower but gives better results.
All times are GMT -4. The time now is 03:45 PM.