Curious what the Pixel 4's Soli radar system "sees" when you wave your hand over it to skip tracks or reach for your phone as it automatically turns on? Turns out, the image it forms is surprisingly undetailed, with "no distinguishable images of a person’s body or face" generated. It's all about detecting motion with finely-tuned machine learning models, and the abstract picture it paints is pretty blurry.

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