imagsize(1) General Commands Manual imagsize(1)
NAME
imagsize - determine the image size of BMP, GIF, JPEG, PBM, PGM, PPM,
PNG, TIFF, XBM, and XPM files
SYNOPSIS
imagsize [-h(elp)] [-f file_list] [-n(ormal_format)] [-p(ipe)]
[-x(window_format)] [-v(erbose)] [-w(eb_format)] file...
DESCRIPTION
imagsize determines the dimensions of BMP, GIF, JPEG, PBM, PGM, PPM,
PNG, TIFF, WEBP, XBM, and XPM files. It also determines a few other
numbers (bit depth, quality estimates, etc.) for a subset of the file
formats. It's a minimal program for situations where you don't want to
install (or use) a large image manipulation package such as
ImageMagick.
OPTIONS
-h Print help and quit.
-f file_list
Read the names of files to be processed from the specified file.
-n Print output in normal format. This is the default.
-p Read the names of files to be processed from stdin.
-w Print output in a format suitable for including in an HTML-based
Web page.
-v Verbose output. Print results for non-image files, which are
normally skipped entirely.
-x Print outout in a format suitable for including in command lines
of X-Window program commands
NOTES
The -f and -p options can be used simultaneously with filenames
specified on the command line.
HISTORY
The imagsize program is heavily derived from Jef Poskanzer's excellent
image_size program. The JPEG quality estimates (derived from Allen
Hessenflow's jpegdump program) and various output format options were
added by Brian Lindholm.
SEE ALSO
identify(1)
COPYRIGHT
Original image_size program copyright (C) 1997,1998 by Jef Poskanzer.
All rights reserved except as specified below.
Derived imagsize program copyright (C) 2004-2026 by Brian Lindholm.
All rights reserved except as specified below.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
The JPEG quality estimation algorithm used in this program comes from
the jpegdump program, which is Copyright (C)1992 Handmade Software,
Inc. by Allan N. Hessenflow.
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation. This software is provided "as is" without
express or implied warranty.
littleutils 2026 Jan 01 imagsize(1)
littleutils 1.4.0 - Generated Wed Feb 18 07:21:09 CST 2026