Is there a pre-existing CAPTCHA library that I can use to build my object detection dataset for machine learning? I want to do what Google did with reCaptcha.

I am not trying to solve captchas, or protect anything from spam. I am looking for an existing way to distribute the process of tagging features in images before I spend a week coding my own.


  1. OS should be either Windows or Linux
  2. Python or Node.JS preferred

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