CAPTCHA is a technique used to identify wether the user is a human or a BOT(called web robots), and it allows the humans to authenticate themselves by answering some simple questions.

while many techniques are used in captcha like text captcha , photo captcha, sound captcha etc; many of them were easily broken by spammers.like text captcha is a distorted image of containing some abnormal text, and with the help of OCR(Optical Character Reader) we could easily break the text captcha...

In this project create a control which is to be embedded on to the registration page of website, and the control consists of 4 consecutive images(each image again consists of group of sub images) and a combo box containing a list of answers....A common object is present in the four images and the user have to answer the question like ' select the common object in four images from the below list ?