CAPTCHA tests, which we come across many times on websites, can be annoying from time to time. However, these tests are used in a way that benefits humanity.
Digital library with CAPTCHA tests
In 2000, university student Luis Von Ahn and professor Manuel Blum worked together to develop tests that computers cannot solve but can be solved by humans. CAPTCHA was developed for this, which includes the query-response validation loop.
Taking too much time to solve the CAPTCHA tests, however, could be reacted by users. According to statistics, about 200 million tests are solved every day, and an average of 10 seconds is spent for each of these tests. About 500,000 hours a day are spent solving these tests.
ReCAPTCHA, which was developed to use CAPTCHA in a useful way for humanity, is used to benefit humanity. In fact, the result obtained from each reCAPTCHA test solved is used for OCR, known as optical character recognition technology. Old books in libraries are protected by being transferred to digital media with OCR technology. Thus, the loss of old information is prevented.
For example, the New York Times archive, which consists of more than 13 million articles, has been digitized and all articles have been made searchable.