NAME

    Imager::Trim - automatic cropping for images using Imager.

VERSION

    version 0.006

SYNOPSIS

        use Imager::Trim;
    
        my $imager = Imager::Trim->new( file => 'image.jpg' )
            or die "Cannot open file: ", Imager::Trim->errstr();
    
        my $cropped_image = $imager->trim( fuzz => 50 );
    
        $cropped_image->write( file => 'cropped_image.jpg' );

    By default the first pixel from top left is used for automatic
    cropping, however you can provide yourself an Imager::Color for custom
    action:

        use Imager::Trim;
        use Imager::Color;
    
        my $white_color = Imager::Color->new("#FFFFFF");
        my $imager = Imager::Trim->new( file => 'image_with_white_background.jpg' );
        my $color_cropped_image = $imager->trim( color => $white_color );

    You can even do the cropping manually using Imager (on this example,
    we're leaving 2px extra space around the automatically cropped image if
    there's 5px margin):

        use Imager::Trim;
    
        my $imager = Imager::Trim->new( file => 'image.jpg' );
        my $cropped_image = $imager->trim();
    
        my $trim_top = $cropped_image->trim_top;
        my $trim_left = $cropped_image->trim_left;
        my $trim_right = $cropped_image->trim_right;
        my $trim_bottom = $cropped_image->trim_bottom;
    
        my $manually_cropped_image = $imager->crop(
            top => ($trim_top > 5) ? ($trim_top - 2) : $trim_top,
            left => ($trim_left > 5) ? ($trim_left - 2) : $trim_left,
            right => ($trim_right > 5) ? ($trim_right - 2) : $trim_right,
            bottom => ($trim_bottom > 5) ? ($trim_bottom - 2) : $trim_bottom
        );

DESCRIPTION

    This module extends Imager to allow automatic cropping of images. The
    method is similar as used in image editors (e.g. "magic wand") or with
    ImageMagick's "trim" (e.g. 'convert image.jpg -fuzz 50 -background
    white -trim cropped_image.jpg').

SEE ALSO

    http://imager.perl.org/

AUTHOR

    Jussi Kinnula <spot@cpan.org>

COPYRIGHT AND LICENSE

    This software is copyright (c) 2016 by Jussi Kinnula.

    This is free software; you can redistribute it and/or modify it under
    the same terms as the Perl 5 programming language system itself.

