Webcam was introduced in 1991 in Cambridge University Computer Science Department and was known as Coffee Cam. Science this camera could be used over the Internet or web; it was based on the fact that they are low in cost and are portable and the cheapest way for video calling. Today webcams are widely used for video calling, video conference and surveillance. It also help people who are hard of hearing in communicating through sign languages. Apart from these features webcam can be use for gesture control.
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