selthresh(1)

NAME
selthresh.h - Simple perl script to choose the "best" threshold when converting PGM to PBM.

SYNOPSIS
selthresh.h [-yres][-wpath][-lllrl]file1.pgm[file2.pgm...]

DESCRIPTION
This manual page documents briefly the selthresh command. This manual page was written for the Debian distribution because the original program does not have a manual page.

OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. For a complete description, see the Info files.

-y res
    Sets the resolution (defauts to 600 dpi)

-v  Sets the path of the work directory (defaults to "./")

-l ll rl
    Sets the interval to analyse (defaults to [0.4,0.6])

BUGS
 1. won't distinguish two files with identical names but on
    different directories. Example:
        selthresh /home/foo/foo.pgm /tmp/foo.pgm

WARNINGS
1. selthresh destroys the file selthresh.tem.pbm on the work
   directory (if one such file exists), without asking confirmation! 2. Make sure that clara, pnmenlarge and pgmtopbm are on the
   current path. 3. Write permission on the work directory is required. Two files
   will be created there (selthresh.out and selthresh.temp.pbm). The
   file selthresh.out contains all results, please do not remove
   it. 4. The paths of file1.pgm, file2.pgm, etc, must be relative to
   the work directory. 5. The results are affected by MD (see the -P flag), more than
   should be. So the threshold quality measured by selthresh is
   somewhat "unstable". 6. Floating comparisons '<=' and '>=' include a 0.001 delta to
   avoid failures due to the inexact binary representation of some tresholds.

SEE ALSO
clara(1),
The programs are documented fully by The Rise and Fall of a Fooish Bar, available via the Info system.

AUTHOR
This manual page was written by Eduardo Marcel Macan <macan@debian.org>, for the Debian GNU/Linux system (but may be used by others).