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Владимир-C:
А в сервисе я ввожу картинку со своего компьютера, на которой фото миллиардера Прохорова и ни одного слова текста, и сервс мне находит множество таких же фото. Вот это удивительно!

TinEye is a reverse image search engine. You can submit an image to TinEye to find out where it came from, how it is being used, if modified versions of the image exist, or to find higher resolution versions.

TinEye is the first image search engine on the web to use image identification technology rather than keywords, metadata or watermarks. It is free to use for non-commercial searching.

TinEye regularly crawls the web for new images, and we also accept contributions of complete online image collections. To date, TinEye has indexed 1,882,458,529 images from the web to help you find what you're looking for. For more information, please see our FAQ, and for some real TinEye search examples, check out our Cool Searches page.

How does TinEye work?
When you submit an image to be searched, TinEye creates a unique and compact digital signature or 'fingerprint' for it, then compares this fingerprint to every other image in our index to retrieve matches. TinEye can even find a partial fingerprint match. Our fingerprinting technologies have been developed by Idée Inc..

TinEye does not typically find similar images (i.e. a different image with the same subject matter); it finds exact matches including those that have been cropped, edited or resized.

Владимир-C:
Да-а, отличная вещь!