They have also become a source of security and privacy issues, as some built-in webcams can be remotely activated by spyware.
The most popular use of webcams is the establishment of video links, permitting computers to act as videophones or videoconference stations.
A webcam is a video camera that feeds or streams its image in real time to or through a computer to a computer network.
When "captured" by the computer, the video stream may be saved, viewed or sent on to other networks via systems such as the internet, and emailed as an attachment.
One such function has the webcam act as a "magic mirror" to allow an online shopper to view a virtual item on themselves.
Webcam features and performance can vary by program, computer operating system, and also by the computer's processor capabilities.
Video calling support has also been added to several popular instant messaging programs. Software is available to allow PC-connected cameras to watch for movement and sound, a computer e-mailed images of the burglar during the theft of the computer, enabling the owner to give police a clear picture of the burglar's face even after the computer had been stolen.
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