Fox News (April 18) – Facebook has started using pattern recognition that can block the propagation of revenge porn images and warn users about the issue. “The pattern recognition in this revenge porn application is a form of content-based retrieval – or associative memory – which is how human olfactory memory is thought to work,” says artificial intelligence expert Lav Varshney, a professor of electrical and computer engineering at Illinois. “If any future image is similar to what is memorized, it will point it out.”