I track 47 biometric signals from a standard RGB webcam — no infrared, no depth sensor, no special h

I track 47 biometric signals from a standard RGB webcam — no infrared, no depth sensor, no special hardware. The hardest part wasn't the model. It was getting reliable AU (Action Unit) detection at 60fps without dropping frames on a €300 laptop. Micro-expressions last 17–200ms. At 30fps you miss half of them. At 60fps you catch the suppressed ones — the ones people don't even know they're making. Here's how I solved the latency problem without throwing GPU money at it.

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