sgitopnm - convert a SGI image file to PNM

sgitopnm

[-verbose]

[-channel c]

[SGIfile]

This program is part of netpbm(1).

sgitopnm reads an SGI image file as input and 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, the program produces a PGM image of any one of the channels in the input file.

-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.

SGI Image File Format documentation (draft v0.95) by Paul Haeberli (). Available via ftp at sgi.com:graphics/SGIIMAGESPEC.