psidtopgm   -  convert  PostScript  "image"  data  into  a
       portable graymap


SYNOPSIS

       psidtopgm width height bits/sample [imagedata]


DESCRIPTION

       Reads the "image" data from a PostScript  file  as  input.
       Produces a portable graymap as output.

       This  program  is  obsoleted by pstopnm.  What follows was
       written before pstopnm existed.

       This is a very simple and limited  program,  and  is  here
       only  because so many people have asked for it.  To use it
       you have to manually extract the readhexstring  data  por­
       tion  from  your PostScript file, and then give the width,
       height, and bits/sample on the command line.   Before  you
       attempt  this, you should at least read the description of
       the "image" operator in the PostScript Language  Reference
       Manual.

       It  would  probably not be too hard to write a script that
       uses this filter to read a specific variety of  PostScript
       image,  but  the variation is too great to make a general-
       purpose reader.  Unless, of course, you want  to  write  a
       full-fledged PostScript interpreter...


SEE ALSO

       pnmtops(1), pgm(5)


AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.


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