v2e4lisp / ImagePhash

phash binding for perl ( http://phash.org )

ImagePhash

ImagePhash - Perl binding for pHash (http://phash.org)

SYNOPSIS

use ImagePhash qw(pdiff phash);

my $hash1 = phash("img1.jpg");
my $hash2 = phash("img1.png");

my $diff = pdiff($hash1, $hash2);

DESCRIPTION

Measure similarity between images.

EXPORT

None by default.

phash($img)

Calculate a perceptual hash for an image and returns a 16-byte long lowercase hex string which itself represents a 64bit unsinged integer.

pdiff($hash1, $hash2)

Calculate the hamming distance between the two image hashes and returns a positive integer less than 64. A small value means that the two images look similar to each other.

INSTALL

• For linux, libjpeg-dev and libpng-dev are requried.

• For Mac, ImageMagic and libjpeg are required.

• Windows is not supported.

perl Makefile.PL
make
make test
make install

SEE ALSO

• http://phash.org

• phash bindings for other languages https://github.com/clearscene/pHash/tree/master/bindings

• How to automatically identify similar images using phash http://cloudinary.com/blog/how_to_automatically_identify_similar_images_using_phash

AUTHOR

Wenjun Yan, <[e-mail]>

COPYRIGHT AND LICENSE

Copyright (C) 2017 by Wenjun Yan

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.18.2 or, at your option, any later version of Perl 5 you may have available.