Survey Paper on Captcha Using Different Methods And Techniques

摘要

The internet has been enjoying associate more and more vital role in our way of life, with the supply of the many web services comparable to email and search engines. CAPTCHA (Completely machine driven Public Turing take a look at to inform Computers and Humans Apart) was developed to tell apart between pc programs and human users that was initialized in 1997 and was developed in 2000.The development of CAPTCHA system is to supply artistic and validation tests that may be simply resolved by humans and tough for robot. There area unit four forms of strategies in development CAPTCHA that is that the text primarily based CAPTCHA, CAPTCHA supported image, CAPTCHA based audio and video {based mostly primarily based} CAPTCHA .This type of CAPTCHA had developed by mistreatment markup language, JavaScript / J question and Cascading vogue Sheets (CSS).Every CAPTCHA have its own techniques to supply security.. This paper presents a survey of Optical Character Recognition applications and more focuses on 3 important applications of Optical Character Recognition..