This is mainly needed on Wikimedia Commons. But if we had it there it would be useful in many other places.
Image searches based on image recognition is a newish area of technology, I've seen it demonstrated at the British Library, it would have many interesting uses on Wikimedia Commons, not least in categorising new images; but also in enabling our GLAM partners and others to find new similarities amongst art objects and especially archaeological objects uploaded on Commons. Ideally it should work both from an individual image - "find images like this" from a category - these thousand images are examples of what a ship looks like, please find more like them, and from a highlighted area of an image.
WereSpielChequers (talk) 21:03, 10 November 2015 (UTC)
This card tracks a proposal from the 2015 Community Wishlist Survey: https://meta.wikimedia.org/wiki/2015_Community_Wishlist_Survey
This proposal received 9 support votes, and was ranked #67 out of 107 proposals. https://meta.wikimedia.org/wiki/2015_Community_Wishlist_Survey/Search#Image_searches_based_on_image_recognition