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Special software can use the video stream from a webcam to assist or enhance a user's control of applications and games.
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.
This can be applied to games, providing additional control, improved interactivity and immersiveness.
Webcam can be added to instant messaging, text chat services such as AOL Instant Messenger, and Vo IP services such as Skype, one-to-one live video communication over the Internet has now reached millions of mainstream PC users worldwide.
By removing the IR filter of the webcam, IR LEDs can be used, which has the advantage of being invisible to the naked eye, removing a distraction from the user.Webcams may be installed at places such as childcare centres, offices, shops and private areas to monitor security and general activity.Webcams have been used for augmented reality experiences online.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.They have also become a source of security and privacy issues, as some built-in webcams can be remotely activated by spyware.Various software tools in wide use can be employed for this, such as Pic Master (for use with Windows operating systems), Photo Booth (Mac), or Cheese (with Unix systems).For a more complete list see Comparison of webcam software.Small webcam-based PC games are available as either standalone executables or inside web browser windows using Adobe Flash.With very-low-light capability, a few specific models of webcams are very popular to photograph the night sky by astronomers and astro photographers.Some of them, for example, those used as online traffic cameras, are expensive, rugged professional video cameras.making them the lowest-cost form of videotelephony.