Implementation of Colored CAPTCHA

CAPTCHAs is an interesting of research are short for Completely Automated Public Turing test to tell Computers and Humans Apart. The purpose of a CAPTCHA is to block form submissions from spam bots –automated scripts that harvest email addresses from publicly available web forms. We introduce a new CAPTCHA which is based on identifying the color of image, object or background. This actually requires analysis of complex contents of image, which humans usually performs well but machines or robots usually do not. From a large database of images, we select many images which having single color. The main advantages of our CAPTCHA technique over the traditional text-based techniques are that it is languageindependent, does not require text-entry.