sgitopnm - convert a SGI image file to a portable anymap
SYNOPSIS
sgitopnm [-verbose] [-channel c] [SGIfile]
DESCRIPTION
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.
Alternatively, produces a PGM image of any one of the
channels in the input file.
OPTIONS
-verbose
Give some information about the SGI image file.
-channel c
Extract channel c of the image as a PGM image.
Without this option, sgitopnm extracts the first 3
channels as a PPM image or, if the input has only 1
channel, extracts that as a PGM image, and if the
input has 2 channels, fails.
REFERENCES
SGI Image File Format documentation (draft v0.95) by Paul
Haeberli (paul@sgi.com). Available via ftp at
sgi.com:graphics/SGIIMAGESPEC.
SEE ALSO
pnm(5), pnmtosgi(1)
AUTHOR
Copyright (C) 1994 by Ingo Wilken (Ingo.Wilken@infor
matik.uni-oldenburg.de)
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