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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.
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.
Unauthorized access of webcams can present significant privacy issues (see "Privacy" section below).
In December 2011, Russia announced that 290,000 Webcams would be installed in 90,000 polling stations to monitor the Russian presidential election, 2012.
Some of them, for example, those used as online traffic cameras, are expensive, rugged professional video cameras.
Webcams have been used for augmented reality experiences online.
One such function has the webcam act as a "magic mirror" to allow an online shopper to view a virtual item on themselves.
This can be applied to games, providing additional control, improved interactivity and immersiveness.
Free Track is a free webcam motion-tracking application for Microsoft Windows that can track a special head-mounted model in up to six degrees of freedom and output data to mouse, keyboard, joystick and Free Track-supported games.