Flickering lights could help fight misinformation
Cornell computer scientists have developed a watermarking technique called "noise-coded illumination" that could help combat AI-generated video, deepfakes, and doctored clips. The system adds a barely perceptible flicker to light sources in a scene, and each lamp or screen that flickers carries its own unique code. If a viral clip later circulates with an inflammatory statement, investigators can run it through a decoder and check whether the recorded light codes line up to determine if the footage was doctored. While the technique may be hindered by rapid motion and strong sunlight, it could be useful in settings like conference-room presentations, television interviews, or lecture-hall speeches. The researchers believe this technology could be a new tool in the fight against misinformation.
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