Thoughts on vision-captchas [D]

Reddit r/MachineLearning / 4/17/2026

💬 OpinionIdeas & Deep AnalysisTools & Practical Usage

Key Points

  • The post asks whether vision-based CAPTCHAs using webcam plus gesture detection could become the future standard for bot prevention.
  • The author shares an experiment with a CAPTCHA that runs entirely in-browser, claiming no user data leaves the device.
  • A key concern raised is whether users would trust camera-based CAPTCHAs, given privacy implications.
  • The discussion centers on whether fully local processing mitigates privacy concerns enough to make such CAPTCHAs acceptable.

Do you think vision-based CAPTCHAs (webcam + gesture detection) could be the future of bot prevention?

Been experimenting with one,, runs fully in-browser, no data leaves your device. But still curious: would you trust a CAPTCHA that uses your camera? Privacy concern or non-issue if it's fully local?

Would love to hear your thoughts!!

submitted by /u/RossGeller092
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