Text Recognition Using Anonymous CAPTCHA Answers
Alexander Shishkin, Anastasia Bezzubtseva, Valentina Fedorova, Alexey Valerievich Drutsa, Gleb Gusev · 2020
Internet companies use crowdsourcing to collect large amounts of data needed for creating products based on machine learning techniques. A significant source of such labels for OCR data sets is (re)CAPTCHA, which distinguishes humans from automated bots by asking them to recognize text and, at the same time, receives new labeled data in this way. An important component of such approach to data collection is the reduction of noisy labels produced by bots and non-qualified users.