Evaluation and Development of Onomatopoeia CAPTCHAs

摘要

In this study, we propose a new "onomatopoeia CAPTCHA" that applies onomatopoeia; i.e., words containing sounds similar to the noises they describe. Humans usually understand onomatopoeia unconsciously and use it in daily conversation; thus, it is clearly easy for humans to solve. However, it is difficult for computers because the mechanisms to recognize onomatopoeia are not very clear even now.