Image::JpegTran(3)

NAME
Image::JpegTran - XS wrapper around lossless JPEG transformation utility - jpegtran

SYNOPSIS
    use Image::JpegTran;

    jpegtran 'source.jpg','result.jpg', rotate => 90, trim => 1, perfect => 1;
    jpegtran 'source.jpg','result.jpg', transpose => 1;
    jpegtran 'source.jpg','result.jpg', transverse => 1;
    jpegtran 'source.jpg','result.jpg', flip => 'horizontal';

DESCRIPTION
Use lossless jpeg transformations, like when using "jpegtran" utility, from Perl

OPTIONS

copy => 'none'
    Copy no extra markers from source file

copy => 'comments'
    Copy only comment markers

copy => 'all'
    Copy all extra markers (comments and EXIF) (default)

optimize => 0 | 1
    Optimize Huffman table (smaller file, but slow compression), default = 0

progressive => 0 | 1
    Create progressive JPEG file (default = 0)

grayscale => 0 | 1
    Reduce to grayscale (omit color data) (default = 0)

flip => 'horizontal' | 'vertical'
    Mirror image (left-right or top-bottom)

rotate => 90 | 180 | 270
    Rotate image (degrees clockwise)

transpose => 1
    Transpose image

transverse => 1
    Transverse transpose image

trim => 1
    Drop non-transformable edge blocks or

perfect
    Fail if there is non-transformable edge blocks

maxmemory => N
    Maximum memory to use (in kbytes)

arithmetic => 1
    Use arithmetic coding

  -restart N     Set restart interval in rows, or in blocks with B
  -verbose  or  -debug   Emit debug output
  -scans file    Create multi-scan JPEG per script file

AUTHOR
Mons Anderson, <mons@cpan.org>

COPYRIGHT AND LICENSE
The main part of this module is copyright (C) 1991-2010

The Independent JPEG Group's JPEG software

Thomas G. Lane, Guido Vollbeding.

See README.IJG

POD ERRORS
Hey! The above document had some coding errors, which are explained below:

Around line 49:
    Unknown directive: =over4

Around line 51:
    '=item' outside of any '=over'