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fstopgm - convert a Usenix FaceSaver(tm) file into a PGM image |
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fstopgm [fsfile] |
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This program is part of Netpbm(1). fstopgm reads a Usenix FaceSaver(tm) file as input and produces a PGM image 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 pamscale 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 pamscale. Then use one of the following pipelines: fstopgm | pgmnorm fstopgm | pamscale -whatever | pgmnorm To go to PBM, you want something more like one of these: fstopgm | pamenlarge 3 | pgmnorm | pamditherbw fstopgm | pamenlarge 3 | pamscale <whatever> | pgmnorm | pamditherbw 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. |
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pgmtofs(1), pgm(1), pgmnorm(1), pamenlarge(1), pamscale(1), pamditherbw(1) |
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Copyright (C) 1989 by Jef Poskanzer. |