Microsoft's image search engine added another feature that uses image analysis: “With Live Search, you can now use images, rather than additional keyword queries, to refine a search and discover more content,” explains Live Search's blog.

For example, if you searched for images of boxing icon Muhammad Ali, you would get initial results that include everything from portraits to action shots of both a young and old Ali. But say that you’d like to see more images of Ali’s famous defeat of Sonny Liston. When you hover over that photo in the results, you’ll see an option to Show Similar Images. If you click on Show Similar Images, you'll get a new set of results focused solely on the iconic image from 1964 in which Ali towers over an unconscious Liston, after a quick right cross to the jaw.