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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