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by jpalomaki 2568 days ago
Add heartbeat detection to verify the person is alive. [1] has one example, Google "use webcam to detect heartbeat" to find more.

[1] https://github.com/thearn/webcam-pulse-detector

2 comments

Add gaze tracking and have people look at a randomly moving dot.
While entering captcha codes every 10 seconds
This is so useful!