pbmtoascii(1) [redhat man page]

pbmtoascii(1)						      General Commands Manual						     pbmtoascii(1)

NAME

       pbmtoascii - convert a portable bitmap into ASCII graphics

SYNOPSIS

       pbmtoascii [-1x2|-2x4] [pbmfile]

DESCRIPTION

       Reads a portable bitmap as input.  Produces a somewhat crude ASCII graphic as output.

       Note that there is no asciitopbm tool - this transformation is one-way.

OPTIONS

       The -1x2 and -2x4 flags give you two alternate ways for the bits to get mapped to characters.  With 1x2, the default, each character repre-
       sents a group of 1 bit across by 2 bits down.  With -2x4, each character represents 2 bits across by 4 bits down.  With the  1x2  mode  you
       can  see the individual bits, so it's useful for previewing small bitmaps on a non-graphics terminal.  The 2x4 mode lets you display larger
       bitmaps on a standard 80-column display, but it obscures bit-level details.  2x4 mode is also good  for	displaying  graymaps  -  "pnmscale
       -width 158 | pgmnorm | pgmtopbm -thresh" should give good results.

SEE ALSO

       pbm(5)

AUTHOR

       Copyright (C) 1988, 1992 by Jef Poskanzer.

								   20 March 1992						     pbmtoascii(1)

fstopgm(1)						      General Commands Manual							fstopgm(1)

NAME

       fstopgm - convert a Usenix FaceSaver(tm) file into a portable graymap

SYNOPSIS

       fstopgm [fsfile]

DESCRIPTION

       Reads a Usenix FaceSaver(tm) file as input.  Produces a portable graymap as output.

       FaceSaver(tm)  files sometimes have rectangular pixels.	While fstopgm won't re-scale them into square pixels for you, it will give you the
       precise pnmscale command that will do the job.  Because of this, reading a FaceSaver(tm) image is a two-step process.  First you do:
	 fstopgm > /dev/null
       This will tell you whether you need to use pnmscale.  Then use one of the following pipelines:
	 fstopgm | pgmnorm
	 fstopgm | pnmscale -whatever | pgmnorm
       To go to PBM, you want something more like one of these:
	 fstopgm | pnmenlarge 3 | pgmnorm | pgmtopbm
	 fstopgm | pnmenlarge 3 | pnmscale <whatever> | pgmnorm | pgmtopbm
       You want to enlarge when going to a bitmap because otherwise you lose information; but enlarging by more than 3 does not look good.

       FaceSaver is a registered trademark of Metron Computerware Ltd. of Oakland, CA.

SEE ALSO

       pgmtofs(1), pgm(5), pgmnorm(1), pnmenlarge(1), pnmscale(1), pgmtopbm(1)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

								    06 April 89 							fstopgm(1)