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Rev Author # Line
1 perry 1 fstopgm
2 !!!fstopgm
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 SEE ALSO
7 AUTHOR
8 ----
9 !!NAME
10
11
12 fstopgm - convert a Usenix !FaceSaver(tm) file into a portable graymap
13 !!SYNOPSIS
14
15
16 __fstopgm__ [[''fsfile'']
17 !!DESCRIPTION
18
19
20 Reads a Usenix !FaceSaver(tm) file as input. Produces a
21 portable graymap as output.
22
23
24 !FaceSaver(tm) files sometimes have rectangular pixels. While
25 ''fstopgm'' won't re-scale them into square pixels for
26 you, it will give you the precise ''pnmscale'' command
27 that will do the job. Because of this, reading a
28 !FaceSaver(tm) image is a two-step process. First you
29 do:
30
31
32 fstopgm
33 This will tell you whether you need to use ''pnmscale.'' Then use one of the following pipelines:
34
35
36 fstopgm | pgmnorm
37 fstopgm | pnmscale -whatever | pgmnorm
38 To go to PBM, you want something more like one of these:
39
40
41 fstopgm | pnmenlarge 3 | pgmnorm | pgmtopbm
42 fstopgm | pnmenlarge 3 | pnmscale
43 You want to enlarge when going to a bitmap because otherwise you lose information; but enlarging by more than 3 does not look good.
44
45
46 !FaceSaver is a registered trademark of Metron Computerware
47 Ltd. of Oakland, CA.
48 !!SEE ALSO
49
50
51 pgmtofs(1), pgm(5), pgmnorm(1), pnmenlarge(1), pnmscale(1),
52 pgmtopbm(1)
53 !!AUTHOR
54
55
56 Copyright (C) 1989 by Jef Poskanzer.
57 ----
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