PTZ Cameras Technology Showcase
Mar 17, 2011 12:00 PM, By Bennett Liles
A survey of the current crop of PTZ camera systems and their features.
The Elmo PTC-400C 1/4in. CCD camera produces 360 vertical lines of resolution with internal synchronization and features a 12X optical and 16X digital zoom, maximum 100-degree-per-second pan/ tilt speed (eight auto/manual speeds), day/night function, image flip, two alarm inputs, 16 shot presets, and remote control via IR and RS-485. With the remote controller, up to nine cameras may be simultaneously operated, and through an RS-485 daisy-chain connection, up to 223 cameras may be used. The unit runs on 12VDC and uses 12W power. Picture adjustments include hue, AGC gain, detail compensation, and high-speed shutter with auto/ manual focus and white balance. The camera also has a power save mode, and each preset shot can be labeled with up to 10 characters.
Designed to be flexible in maintenance as well as in operation, the VN-685U PTZ network dome camera from JVC can be swapped out with another one without removing the base. This preserves all presets and other programming and applies it to the replacement camera. Equipped with a 27X optical and 34X digital zoom, the unit can output MPEG-4 and M-JPEG VGA full-frame dual-stream video and has several AGC modes to operate in a wide range of lighting conditions. It has 100 presets, motion detection with intelligent auto tracking, and privacy mask. The camera can silently pan at speeds from 0.04 degrees per second to 400 degrees per second and position with an accuracy of 0.03 degrees. With optional mounting gear, the camera can be ceiling-pole mounted, wall-mounted, or flush-mounted into the ceiling. It uses 24VDC power over Ethernet and two alarm inputs and outputs.
Using Panasonic’s UniPhier LSI chip, the i-Pro SmartHD WV-SC385 provides 720p video at up to 30fps and outputs multiple H.264 and JPEG video streams. The camera entered the market last November, and it has a new 1.3-megapixel MOS image sensor for high sensitivity using less power. For flexible network integration, it is Open Network Video Interface (ONVIF) compliant. Offering up to 64 preset positions, the unit also has an auto flip function that enables panning from 0 degrees to 360 degrees, and this is combined with auto tracking using four detection areas, 15 sensitivity steps, and 10 steps of detection size. When used with Panasonic’s WV-CU950 universal system controller, the camera moves with 256 speeds.
With wide dynamic range capability, the IP-based Spectra HD from Pelco can compensate for shots in which there is a high contrast between background and foreground illumination, and the unit features automatic cut filter removal for day/night operation. Digital Slow Shutter (DSS) enhances camera sensitivity to improve low-light performance. Additional features include image stabilization and motion detection. An integrated scheduler allows preprogramming of alarms, preset shots, and relay contact closures. Pan speeds range from a very slow 0.1 degrees per second up to 400 degrees per second, and the optional Remote Monitor Kit connects to the RJ-45 port to allow video viewing, control, setup, and system upgrades from the controller. Transmission on single-mode or multimode fiber can be done with the attachment of PelcoFiber modules. The system can simultaneously output streams in dual MPEG-4 at 30fps and scalable M-JPEG.
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