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

SYNOPSIS
        use Image::JpegTran ':all';
    
        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';
    
        jpegautotran 'source.jpg'; # automaticallty rotate image if

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 => 'exif'
        Copy only EXIF marker

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

    discard_thumbnail => 0 | 1
        Discard thumbnail from EXIF (default = 1)

    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' | 'h' | 'vertical' | 'v'
        Mirror image (left-right or top-bottom)

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

    transpose => 1
        Transpose image (flip-h + rotate 270)

    transverse => 1
        Transverse image (flip-h + rotate 90)

    trim => 1
        Drop non-transformable edge blocks (after this, any transformation
        on resulting image would be perfect)

    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, <[email protected]>

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 58:
        Unknown directive: =over4

    Around line 60:
        '=item' outside of any '=over'