
upright=1.35|thumb|This CAPTCHA (GIMPY-R, c. 2005) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.
A CAPTCHA is a test that asks you to prove you're human by completing a task a computer can't easily do, like reading distorted letters or identifying objects in images. Websites use CAPTCHAs to prevent automated programs from accessing accounts or abusing services.
AI-generated from the Wikipedia summary — may contain errors.
upright=1.35|thumb|This CAPTCHA (GIMPY-R, c. 2005) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.
A CAPTCHA ( ) is a type of challenge–response Turing test used in computing to determine whether the user is human in order to deter bot attacks and spam.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).