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May 24, 2019 12:50 am

Deepfakes Can Now Be Made From a Single Photo

Samsung has developed a new artificial intelligence system for creating deepfakes -- fabricated clips that make people appear to do or say things they never did -- that only needs as little as one photo. CNET reports: The technology, of course, can be used for fun, like bringing a classic portrait to life. The Mona Lisa, whose enigmatic smile is animated in three different videos to demonstrate the new technology, exists solely as a single still image. A Samsung artificial intelligence lab in Russia developed the technology, which was detailed in a paper earlier this week. Here's the downside: These kinds of techniques and their rapid development also create risks of misinformation, election tampering and fraud, according to Hany Farid, a Dartmouth researcher who specializes in media forensics to root out deepfakes. The system starts with a lengthy "meta-learning stage" in which it watches lots of videos to learn how human faces move. It then applies what it's learned to a single still or a small handful of pics to produce a reasonably realistic video clip. Unlike a true deepfake video, the results from a single or small number of images fudge when reproducing fine details. For example, a fake of Marilyn Monroe in the Samsung lab's demo video missed the icon's famous mole, according to Siwei Lyu, a computer science professor at the University at Albany in New York who specializes in media forensics and machine learning. It also means the synthesized videos tend to retain some semblance of whoever played the role of the digital puppet. That's why each of the moving Mona Lisa faces looks like a slightly different person. [...] The glitches in the fake videos made with Samsung's new approach may be clear and obvious. But they'll be cold comfort to anybody who ends up in a deepfake generated from that one smiling photo posted to Facebook.

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