NAME
    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-dimen-
    sional (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@informatik.uni-olden-
    burg.de)