convert a SGI image file to a portable anymap
see also :
[-verbose] [-channel c]
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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.
produces a PGM image of any one of the channels in the input
Give some information about the
SGI image file.
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.
SGI Image File Format documentation (draft v0.95) by Paul
Haeberli (paul[:at:]sgi[:dot:]com). Available via ftp at
1994 by Ingo Wilken