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19-Jul-2019 06:10

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making them the lowest-cost form of videotelephony.

Despite the low cost, the resolution offered at present (2015) is rather impressive, with low-end webcams offering resolutions of 320×240, medium webcams offering 640×480 resolution, and high-end webcams offering 1280×720 (aka 720p) or even 1920×1080 (aka 1080p) resolution.

For a more complete list see Comparison of webcam software.

Special software can use the video stream from a webcam to assist or enhance a user's control of applications and games.

Researchers claim that this method is accurate to ±5 bpm.

Webcams may be installed at places such as childcare centres, offices, shops and private areas to monitor security and general activity.

The term "webcam" (a clipped compound) may also be used in its original sense of a video camera connected to the Web continuously for an indefinite time, rather than for a particular session, generally supplying a view for anyone who visits its web page over the Internet.

Some of them, for example, those used as online traffic cameras, are expensive, rugged professional video cameras.

One such function has the webcam act as a "magic mirror" to allow an online shopper to view a virtual item on themselves.

When sent to a remote location, the video stream may be saved, viewed or on sent there.

Unlike an IP camera (which connects using Ethernet or Wi-Fi), a webcam is generally connected by a USB cable, or similar cable, or built into computer hardware, such as laptops.

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.Unauthorized access of webcams can present significant privacy issues (see "Privacy" section below).