pixcolors - Count/list color values used in a PIX(5) format image
pixcolors reports on the standard output the number of distinct colors
used in the pix(5) format file on the standard input.
-v
Causes a sorted list of the unique colors used to be
printed on standard output in addition to the count report.
This software is Copyright (c) 1989-2019 by the United States Government as
represented by U.S. Army Research Laboratory.
Reports of bugs or problems should be submitted via electronic mail to
devs@brlcad.org