The Internet plays an increasingly important role in people's lives, but it also brings security
problems. CAPTCHA, which stands for Completely Automated Public Turing Test to Tell …

A novel approach for automatic segmentation and recognition of CAPTCHAs with variable
orientation and random collapse of overlapped characters is presented in this paper …

Text-based CAPTCHA images have been widely utilized in on-line applications to anti
malicious programs which attempt to make failure in execution or computation. Although …

Segmentation subdivides a CAPTCHA image into its constituent regions or objects. The
point to which the subdivision is carried depends on the problem being solved. That is …

Typing CAPTCHA is usually troublesome and is unpleasant for the users. But the security of
some of the websites depends on it and causes that human being is distinguished from …

Public Turing test to tell Computers and Human Apart) can be considered as guardian of the
World Wide Web. It is used to protect the web resources from malicious users. Among many …