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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.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.Improved video quality has helped webcams encroach on traditional video conferencing systems.
New features such as automatic lighting controls, real-time enhancements (retouching, wrinkle smoothing and vertical stretch), automatic face tracking and autofocus, assist users by providing substantial ease-of-use, further increasing the popularity of webcams.Video features, including faces, shapes, models and colors can be observed and tracked to produce a corresponding form of control.For example, the position of a single light source can be tracked and used to emulate a mouse pointer, a head-mounted light would enable hands-free computing and would greatly improve computer accessibility.With very-low-light capability, a few specific models of webcams are very popular to photograph the night sky by astronomers and astro photographers.