Reads an SGI image file as input.
Produces a PGM image for a 2-dimensional (1 channel) input file, and a
PPM image for a 3-dimensional (3 or more channels) input file.
OPTIONS
-verbose
Give some information about the SGI image file.
BUGS
Probably.
REFERENCES
SGI Image File Format documentation (draft v0.95) by Paul Haeberli
(paul@sgi.com). Available via ftp at sgi.com:graphics/SGIIMAGESPEC.