computer hardware, consumer electronics, electronic components  

PTZ (pan, tilt and zoom) camera

Vedio surveillance equipment commonly use PTZ (pan, tilt and zoom) cameras to monitor a variety of locations or scenes using. Such pan-and-tilt camera apparatus are controlled from a remotely-located operator's console having a video monitor for viewing the scenes observed by the camera. ovement in a vertical plane tilts the camera so the lens is pointed generally horizontally or downwardly, and this motion is usually referred to in the trade as tilting. Movement in a horizontal plane points the lens of the camera from side to side, and is generally referred to as panning. The pan-and-tilt apparatus rotates (pans) the camera about a typically vertical axis and also changes the azimuth of (tilts) the camera to position the camera from scene to scene. Pan and tilt motors for surveillance cameras provide for approximately one rotation of the camera, i.e. about 360 degrees of rotation in panning which allow the camera to point in any given direction. An electronic pan, tilt, zoom (EPTZ) camera is small, fast, inexpensive, quiet, reliable, durable, easy to manufacture and easy to upgrade. Cameras with electronic EPTZ features can be used in, for example, cameras incorporated in set-top boxes for video conferencing, in surveillance cameras, camcorders and digital still cameras, among other applications. A digital EPTZ camera typically has three main independent components: an imager section, a sharpening filter, and a scaling circuit or "scaler". The imager section typically includes a lens and a solid-state imager chip, such as a CCD or CMOS type image sensor. The imager sensor includes a plurality of photosensitive areas arranged as a two-dimensional array which is scanned either interlaced or progressively.


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