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Computer scientists have developed a tool that detects fake videos using deepfake techniques with near-perfect accuracy, according to the British newspaper Daily Mail.
The new system, which analyzes the reflections of light in the eyes of the character subject of the fake video, was 94% effective in the experiments.
Important details
In real photos, the light reflected in the eyes is usually the same shape and color because both eyes are looking at the same thing. Since deepfakes are compounds made up of many different images, most of them cannot be overpowered by these important details.
“The cornea looks like a perfect spheroid and reflects light very well,” says Siwi Liu, professor of computer science at Sunny Buffalo University.
And both eyes should have similar reflective patterns, Liu said, because they are looking at the same thing. Most of those who watch the videos miss these details, says Liu, because they usually look at the face in general.
Liu, who is also an expert in multimedia and digital forensics, posted a new research paper posted on the open access portal arXiv.
Artificial intelligence errors
Liu explains that in any original video or still photograph, what is visible to the eyes is reflected, usually of the same shape and color. But because AI uses so many different images to create a fake so close to reality, the fake image usually lacks these details.
Liu says the innovative tool was able to detect possible differences in shape, intensity and other characteristics of light reflected in fake videos as well as photographs with 94% accuracy, admitting that the new technology is imperfect only what it requires. the presence of a reflected light source.
Competent user
Liu notes that it is possible for a proficient deepfake user to correct inconsistent light reflections in post-production, that is, after the fake video has been edited.
The new technology only checks the individual pixels that are reflected in the eyes, not the shape of the eye, the shapes inside the eye, or the nature of what is reflected in the eye.
The American Election and Tom Cruise
The “deepfake” technique was of particular concern in the 2020 US presidential election, amid concerns that it could be used to discredit candidates and spread disinformation.
And earlier this month, fake videos of American superstar Tom Cruise appeared to perform magic tricks and play golf on the video-sharing app TikTok.
Rachel Toback, CEO of internet security firm SocialProof, tweeted at the time: “Deepfakes will affect public trust, provide coverage and reasonable denial for abusive criminals captured on video or audio, and it can be used ( and will be used) to manipulate and humiliate people. And hurt them, “calling for the urgent need to develop counter-applications to protect victims of deepfakes.
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