pgmhist(1)

NAME

pgmhist - create a histogram of an image

SYNOPSIS

pgmhist [-s] <infile> [delta [filter [dstage [sstage]]]]

DESCRIPTION

pgmhist opens infile and calculates the greyscale/coefficients histogram with step width delta on it writing the result to the standard output. If specified, a Wavelet transform using filter will be performed, so that the histogram is generated from the decomposed image. The number of transformation steps can be limited by dstage, so that only these first subbands is considered for the histogram (the remaining LL part is ignored in that case). To get a histogram on a range of subbands, the subband to start with, sstage can be specified. If the first argument is -s, the Standard decomposition will be used instead of the Pyramid one.

NOTES

The pgmhist utility is part of the Wavelet class library package. The version number refers to the whole package rather than to the utility.

Apart from PGM, pgmhist may, if enabled, also be able to read PFI files.

BUGS

None known yet.

COPYRIGHT
Copyright (C) 2001-2003 Herbert

pgmhist is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.

pgmhist is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

AUTHOR
Herbert Martin Dietze <herbert@spamcop.net>