Affiliation:
1. Vicarious AI, 2 Union Square, Union City, CA 94587, USA.
Abstract
Computer or human?
Proving that we are human is now part of many tasks that we do on the internet, such as creating an email account, voting in an online poll, or even downloading a scientific paper. One of the most popular tests is text-based CAPTCHA, where would-be users are asked to decipher letters that may be distorted, partially obscured, or shown against a busy background. This test is used because computers find it tricky, but (most) humans do not. George
et al.
developed a hierarchical model for computer vision that was able to solve CAPTCHAs with a high accuracy rate using comparatively little training data. The results suggest that moving away from text-based CAPTCHAs, as some online services have done, may be a good idea.
Science
, this issue p.
eaag2612
Publisher
American Association for the Advancement of Science (AAAS)
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