NAME
Image::Seek - A port of ImgSeek to Perl
DESCRIPTION
use Image::Seek qw(loaddb add_image query_id savedb);
loaddb("haar.db");
# EITHER
my $img = GD::Image->newFromJpeg("photo-216.jpg", 1);
# OR
my $img = Imager->new();
$img->open(file => "photo-216.jpg");
# OR
my $img = Image::Imlib2->load("photo-216.jpg");
# Then...
add_image($img, 216);
savedb("haar.db");
my @results = query_id(216); # What looks like this photo?
remove_id(216); # Just remove id from database.DESCRIPTION
ImgSeek (http://www.imgseek.net/) is an implementation of Haar wavelet decomposition techniques to find similar pictures in a library. This module is port of the ImgSeek library to Perl's XS. It can deal with image objects produced by the Imager and Image::Imlib2 libraries.
EXPORT
None by default, but the following functions are available:
savedb($file)
Dumps the state of the norms and image buckets to the file $file.
loaddb($file)
Loads a database of image norms produced by savedb
cleardb
Clears the internal database. Note that loaddb will load into memory a bunch of data that you may already have - it will duplicate rather than replace this data, so results will be skewed if you load a database multiple times without clearing it in between.
add_image($image, $id)
Adds the image object to the database, keyed against the numeric id $id. This will compute the Haar transformation for a 128x128 thumbnail of the image, and then store its norms into a database in memory.
remove_id($id)
remove id from database, and you should savedb to save the changed database.
query_id($id[, $results))
This queries the internal database for pictures which are "like" number $id. It returns a list of $results results (by default, 10); a result is an array reference. The first element is the ID of a picture, the second is a score. So for example:
query_id(2481, 5)returns, in a shoot I have, the following:
[ 2481, -38.3800003528595 ],
[ 2480, -37.5519620793145 ],
[ 2478, -37.39896965962 ],
[ 2479, -37.2777427507208 ],
[ 2584, -10.0803730081134 ],
[ 2795, -7.89326129961427 ]Notice that the scores go the opposite way to what you might imagine: lower is better. The results come out sorted, and the first result is the thing you queried for.
SEE ALSO
http://www.imgseek.net/
AUTHOR
Simon Cozens, <simon@cpan.org> Lilo Huang, <kenwu@cpan.org>
All the clever bits were written by Ricardo Niederberger Cabral; I just mangled them to wrap Perl around them.
COPYRIGHT AND LICENSE
Copyright (C) 2005 by Simon Cozens, 2008 by Lilo Huang
This library is free software; as it is a derivative work of imgseek, this library is distributed under the same terms (GPL) as imgseek.