Requirements

Based on PIL Image, numpy and scipy.fftpack (for pHash)

Basic usage

>>> import Image
>>> import ImageHash
>>> hash = ImageHash.average_hash(Image.open('test.png'))
>>> print hash
d879f8f89b1bbf
>>> otherhash = ImageHash.average_hash(Image.open('other.bmp'))
>>> print otherhash
ffff3720200ffff
>>> print hash == otherhash
False
>>> print hash - otherhash
36

Demo function find_similar_images illustrates finding similar images in a directory.

References:

* pHash implementation following http://www.hackerfactor.com/blog/index.php?/archives/432-Looks-Like-It.html
* dHash implementation following http://www.hackerfactor.com/blog/index.php?/archives/529-Kind-of-Like-That.html