Perceptual hash

i am reading about perceptual hash.
because i am looking in to identifying different objects in a room. the objects are lamps and look all very similar but are unique. i would like to be able to tell which object/image a user is pointing their camera at.

so i found this:

here: http://www.hackerfactor.com/blog/?/archives/432-Looks-Like-It.html
and here: http://phash.org

and it sounds super interesting:

“A perceptual hash is a fingerprint of a multimedia file derived from various features from its content.”

"Insight is a simple perceptual image hashing system that can compare two images and measure their similarity. "

now i just need to get this working in OF :slight_smile:

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