Webcams are small cameras, usually with a video camera, whose images can be accessed using internet, instant messaging, or a PC videoconferencing application. Webaccessible cameras have a digital camera which uploads images to a web server, either continuously or at regular intervals. This may be achieved by a camera attached to a PC, or by dedicated hardware.
What are Webcams?
Videoconferencing cameras are connected directly to a PC with internet, analog cameras can be used if connected to a video capture card and then to the internet.
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An average webcam typically consists of a lens, an image sensor and some support electronics. There are various lenses, the most common is made out of plastic and can be screwed in and out in order to set the focus of the camera.
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