"A survey of CAPTCHA technologies to distinguish between human and computer."

Xin Xu, Lei Liu, Bo Li (2020)

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DOI: 10.1016/J.NEUCOM.2019.08.109

access: closed

type: Journal Article

metadata version: 2022-03-17

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Xin Xu, Lei Liu, Bo Li:
A survey of CAPTCHA technologies to distinguish between human and computer. Neurocomputing 408: 292-307 (2020)

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