Sometimes a picture is really worth a thousand words. This is
exactly when an image search engine turns out to be quite handy.
Obviously, to someone who just wants to know what a [fennec fox]
is, to look at a picture makes more sense than to read all about
the shape of the animal’s ears or the length of its tail. A
graphic image is complementary to almost any search result and
is essential to queries like [Rothko], which retrieve on Yandex
not only the information about the artist, but also images of
his masterpieces. Yandex retrieves images using the text that
somehow refers to this image — it could be a tag, text
description, html title, page title, a link to this image from
another website. Of the billions of images available through
Yandex, only half are unique. The remaining half is the so-
called duplicate images, those that do not differ at all or
differ insignificantly. Yandex.Images, a specialized image
search service, categorizes duplicate copies it finds into four
classes: Exact duplicates — absolut