exiftran.man

linux下开源图片codec

.TH exiftran 1 "(c) 2003 Gerd Knorr"
.SH NAME
exiftran - transform digital camera jpeg images
.SH SYNOPSIS
.B exiftran [ options ] file(s)
.SH DESCRIPTION
.B exiftran
is a command line utility to transform digital image jpeg images.  It
can do lossless rotations like jpegtran, but unlike jpegtran it cares
about the EXIF data: It can rotate images automatically by checking
the exif orientation tag, it updates the exif informaton if needed
(image dimension, orientation), it also rotates the exif thumbnail.
It can process multiple images at once.
.SH TRANSFORM OPTIONS
.TP
.B -a
automatic (using exif orientation tag)
.TP
.B -9
rotate by 90 degrees
.TP
.B -1
rotate by 180 degrees
.TP
.B -2
rotate by 270 degrees
.TP
.B -f
flip vertical
.TP
.B -F
flip horizontal
.TP
.B -t
transpose
.TP
.B -T
transverse
.TP
.B -nt
Don't rotate exif thumbnail.
.TP
.B -ni
Don't rotate jpeg image. You might need this or or the -nt option to
fixup things in case you rotated the image with some utility which
ignores the exif thumbnail.
.TP
.B -no
Don't update the orientation tag.  By default exiftran sets the
orientation to "1" (no transformation needed) to avoid other
exif-aware applications try to rotate the already-rotated image
again.
.SH OTHER OPTIONS
.TP
.B -h
print a short help text
.TP
.B -d
Dump exif data for the file(s).
.TP
.B -c <text>
Set jpeg comment tag to <text>.
.TP
.B -o <file>
Specify output file.  Only one input file is allowed in this mode.
.TP
.B -i
Enable inplace editing of the images.  Exiftran allows multiple input
files then.  You must specify either this option or a output file with
-o for all operations which modify the image (i.e. everything but -d
right now).
.TP
.B -b
Create a backup file when doing inplace editing.
.TP
.B -p
Preserve timestamps (atime + mtime) when doing inplace editing.
.SH EXAMPLES
Autorotate all jpeg files in the current directory:
.nf
   exiftran -ai *.jpeg
.fi
.SH SEE ALSO
jpegtran(1), exif(1)
.SH AUTHOR
Gerd Knorr <[e-mail]>
.SH COPYRIGHT
Copyright (C) 2002 Gerd Knorr <[e-mail]>
.P
This program 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 of the License, or
(at your option) any later version.
.P
This program 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.
.P
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.