pHash (perceptual hash) for duplicates & similar

Ideas for improvements and requests for new features in XnView Classic

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Goulu
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Joined: Thu May 29, 2008 12:49 pm

pHash (perceptual hash) for duplicates & similar

Postby Goulu » Fri Sep 29, 2017 2:55 pm

Hello,

I suggest indexing all images in the database by a "perceptual hash" . See here : http://www.hackerfactor.com/blog/?/arch ... ke-It.html it's extremely simple and fast. There is a library here to do it : https://www.phash.org/

I use it for a professional project and it's incredible : with a 32 bits key, you can instantaneously (well O(log N) ...) find duplicates in hundreds of thousands of images. And very quickly find similar images.

Since XnView already builds a database, I think this feature would make it the fastest duplicates and similar image finder on Earth. :D

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xnview
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Re: pHash (perceptual hash) for duplicates & similar

Postby xnview » Mon Oct 02, 2017 7:24 am

thanks, i'll check it
Pierre.

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m.Th.
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Re: pHash (perceptual hash) for duplicates & similar

Postby m.Th. » Mon Jan 29, 2018 7:29 am

m. Th.

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