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Axis PTZ IP camera.

Vinten robotic camera control at

Al Jazeera studios in London.

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Pan –tilt–zoom cameraFrom Wik ipedia, the free encyclopedia

A pan–tilt–zoom camera (PTZ camera) is a

camera that is capable of remote directional and

zoom control.

In television production, PTZ controls are used with

professional video cameras in television studios and

referred to as camera robotics. These systems can be

remotely controlled by automation systems. The

PTZ controls are generally sold separately without

the cameras.

PTZ is an abbreviation for pan, tilt and zoom and

reflects the movement options of the camera. Other

types of cameras are ePTZ or virtual pan-tilt-zoom(VPTZ) where a high-resolution camera digitally

zooms and pans into portions of the image, with no

physical camera movement. Ultra-low bandwidth

surveillance streaming technologies use VPTZ to stream user-

defined areas in higher quality without increasing overall bandwidth

usage. Surveillance cameras of this type are often connected to a

digital video recorder which records the full field of view in full

quality.

PTZ Cameras are commonly used in applications such assurveillance, video conferencing, live production, lecture capture

and distance learning.

Auto tracking

An innovation to the PTZ camer a is a built-in firmware program that monitors the change of pixels

generated by the video clip in the camera. When the pixels change due to movement within the cameras

field of view, the camer a can actually focus on the pixel variation and move the camera in an attempt to

center the pixel fluctuation on the video chip. This process results in the camera following movement.

The program allows the camera to estimate the size of the object which is moving and distance of the

movement from the camera. With this estimate, the camera can adjust the cameras optical lens in and out

in an attempt to stabilize the size of pixel fluctuation as a percentage of total viewing area. Once the

movement exits the cameras field of view, the camera automatically returns to a pre-programmed or

"parked" position until it senses pixel variation and the process starts over again.

See also

Axis Communications

BoschIP cameraList of camera typesPanasonicSony

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