1Pbmtog3 User Manual(0)                                  Pbmtog3 User Manual(0)
2
3
4

NAME

6       pbmtog3 - convert a PBM image into a Group 3 MH fax file
7
8

SYNOPSIS

10       pbmtog3 [-reversebits] [-nofixedwidth] [-align8|-align16] [pbmfile]
11
12

DESCRIPTION

14       This program is part of Netpbm(1).
15
16       pbmtog3  reads  a PBM image as input and produces a Group 3 MH fax file
17       as output.
18
19       You can also generate a TIFF file that uses the same  encoding  inside,
20       with pamtotiff.
21
22       There is no program in Netpbm that generates other fax formats, such as
23       MR and MMR, but pamtotiff can generate TIFF files that use those encod‐
24       ings.
25
26

OPTIONS

28       -reversebits
29              This  option  causes  the  output to have the bits in every byte
30              reversed so the least significant bit becomes the most  signifi‐
31              cant  bit.   Apparently, there is some ambiguity in transmission
32              protocols so that the bits get  reversed  on  transmission,  and
33              this  compensates  for  that.   If you get a whole bunch of "bad
34              code word" messages when you try to read the G3 file (e.g.  with
35              g3topbm), try using this option.  Note that the output is not G3
36              when you use this option.
37
38
39       -nofixedwidth
40              Most fax machines expect the image to be 1728 columns  wide,  so
41              pbmtog3  cuts  the output to this width by default.  If you want
42              to keep the width of the original image, use this option.
43
44              This option was new in Netpbm 10.6 (July  2002).   Before  that,
45              pbmtog3 always kept the width of the original image.
46
47
48       -align8
49
50       -align16
51              These options say to align output rows to 8-bit or 16-bit bound‐
52              aries, respectively, by adding padding  bits  in  front  of  EOL
53              codes
54
55              Without  these  options,  pbmtog3  adds  no padding and rows may
56              begin and ends anywhere within a byte.
57
58              You cannot specify both.
59
60              These options were new in Netpbm 10.79 (June 2017).
61
62
63
64

SEE ALSO

66       g3topbm(1), pamtotiff(1), pbm(1) fax formats(1)
67
68
69

HISTORY

71       Before Netpbm 10.79 (June 2017), there was a different program  by  the
72       same  name  in  Netpbm,  which  was written by Paul Haeberli <paul@man‐
73       ray.sgi.com> in 1989 and then modified extensively by others.
74
75       Akira Urushibata <afu@wta.att.ne.jp> wrote the current version, with an
76       entirely different algorithm, in April 2017 and contributed his work to
77       the public domain.
78
79       The current program is backward compatible with the pre-10.79 version.
80

DOCUMENT SOURCE

82       This manual page was generated by the Netpbm tool 'makeman'  from  HTML
83       source.  The master documentation is at
84
85              http://netpbm.sourceforge.net/doc/pbmtog3.html
86
87netpbm documentation             20 April 2017          Pbmtog3 User Manual(0)
Impressum