gendit(6D)

NAME
     gendit - perform general image dithering

SYNOPSIS
     gendit inimage.rgb outimage.rgb nr ng nb [-s]

DESCRIPTION
     gendit uses an ordered dither to create an image with fewer colors.  The
     argument nr selects how many levels or red to use, while ng, and nb
     select the number of green and blue levels respectively.  The minimum
     value for nr, ng, or nb is 2.  The total number of colors used will be
     nr*ng*nb.  The "-s" option is used to offset the dither patterns used for
     red, green and blue by 2 pixels.