TinEyeA new search engine that takes images you upload (or link to) and finds other images like it. Seems like a cool idea so I've given it a bit of a test:
=====================================================================================
1) Picture of a car - filename: koenigseffccgt.jpg
Result - 37 hits, all the same image, although some variation in editing.
2) Same picture of car - filename: prettyflowers.jpg
Result - same 37 hits
3) Picture of Megan Fox
Result - 501 hits, mostly the same image in various crops and edits, but also some other images which are composites and include the seed image
4) Cropped portion of the prior image - filename testsnip.jpg
Result - Fail
"Image too simple to create unique signature"5) Larger cropped portion of the Megan Fox image - filename test2.jpg
Result - 0 hits, but no specific failure message as in #4
6) Crop of Megan Fox image, including part of her face - filename face.jpg
Result - 35 hits, all versions of the original image
7) Crop of Charlie Chaplin's face
Result - 0 hits, (compared to 63 frsults for
the original image=====================================================================================
So seems quite good for finding other versions of an image you already have. Doesn't seem like you can seed it and have it find other images of the same person. Not quite sure I can figure out what the use of it is yet, but seems like an amusing toy.
edit: Now with added link!