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We all know that AI can be used to swap faces in photos and videos. People have, of course, taken advantage of this tool for some disturbing uses, including face-swapping people into pornographic videos -- the ultimate revenge porn. But if AI can be used to face swap, can't it also be used to detect when such a practice occurs? According to a new paper on arXiv.org, a new algorithm promises to do just that, identifying forged videos as soon as they are posted online.
Source: https://www.engadget.com/2018/04/11/machine-learning-face-swaps-xceptionnet/
Technology Review continues:
But the work also has sting in the tail. The same deep-learning technique that can spot face-swap videos can also be used to improve the quality of face swaps in the first place—and that could make them harder to detect.
The new technique relies on a deep-learning algorithm that [Andreas] Rossler and co have trained to spot face swaps. These algorithms can only learn from huge annotated data sets of good examples, which simply have not existed until now.
So the team began by creating a large data set of face-swap videos and their originals.
(Score: 2) by DannyB on Thursday April 12 2018, @02:52PM (1 child)
This technique can be used for anything where machine learning does not do an entirely convincing job.
I'll use the term "fakes" to refer to a machine learning result attempting to reproduce the real thing. But such that it is known that it is a machine learning creation.
You train a 2nd AI to spot the fakes. Use that to better train the 1st AI to produce better fakes. Repeat.
The 2nd AI's training data consists of images of the real thing vs fakes produced by the 1st AI. Each item in that data set is KNOWN to be either the real thing, or a result produced by the 1st AI. So training of the 2nd AI is good.
Thus the improved training of the 1st AI becomes good. So they you have to carefully watch the 2nd AI's results because you're training it to distinguish images that are fake from real. At some point, the difference should disappear and the 2nd AI will be unable to actually tell the difference.
Now, I'm not just talking about fake pr0n here. This could be for AI creating fake cat pictures indistinguishable from the real thing. Or altered auto accident footage. Or altered "locker room talk" by politicians that goes way beyond what normal people talk about in the locker room.
The lower I set my standards the more accomplishments I have.
(Score: 3, Funny) by realDonaldTrump on Thursday April 12 2018, @05:33PM
Some of these Fakes are amazing. Let me tell you, they fooled me. With the Access Hollywood "tape." They call it a "tape." It's not a tape. It's a Fake. But it sounds just like me. At first I thought it was me. And I apologized. But it turned out to be TOTALLY FAKE!!!