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Image::Seek.3pm

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.