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Google upped its stalker factor this week by adding face recognition abilities to its image search. While currently unofficial and unannounced, users can now search for images that only contain faces by appending a query string onto the end of a search URL. For example, a general image search for "Ars Technica" produces a variety of image results, but when appending "&imgtype=face" to the end of the URL, all new results contain photos of people.
The hidden feature was discovered by Google Blogoscoped, and there is currently no way to indicate that you only want to search for faces through the image search interface. However, both "&imgtype=face" and "&imgtype=news" trigger different search results than what is presented by default—the latter showing only images that are associated with news stories.
Did I mention it was my Birthday yesterday? read The search by John Battelle. He talks alot about this...
