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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.
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.
Track IR is a commercial version of this technology.
Webcams can be used to take video clips and still pictures.
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).
The lenses of the cameras are removed and then these are attached to telescopes to record images, video, still, or both.
In newer techniques, videos of very faint objects are taken for a couple of seconds and then all the frames of the video are "stacked" together to obtain a still image of respectable contrast.
With very-low-light capability, a few specific models of webcams are very popular to photograph the night sky by astronomers and astro photographers.
Mostly, these are manual-focus cameras and contain an old CCD array instead of comparatively newer CMOS array.
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.
For a more complete list see Comparison of webcam software.