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AutoDome Modular Camera System Glossary of CCTV Terms | en 57
Bosch Security Systems, Inc. VG4-200, VG4-300, VG4-500i Series User’s Manual F01U064036 | 1.0 | 2007.01
I
Image Stabilization
An algorithm that virtually eliminates camera shake in both the vertical and horizontal axes,
resulting in exceptional image clarity.
Infrared Illumination
Electromagnetic radiation (light) with a longer wavelength than is visible to the naked eye. IR
illumination is prominent at dusk and dawn and in incandescent lamps. IR illuminators come
in the form of lamps with the appropriate filters, LEDs, or lasers. CCD sensors are less
sensitive to IR than visible light, but IR can significantly increase the total illumination level,
leading to a much better image at low light levels.
IP 66
The IP code (Ingress Protection) indicates the degree of protection provided by enclosures for
electrical equipment. The first number indicates protection of internal equipment against the
ingress of solid foreign objects. The second number indicates protection of internal
equipment against harmful ingress of water. Higher digits refer to higher levels of protection.
See also NEMA rating.
IP Address
The address of a device attached to an IP network. Each device on an IP network must use a
unique address. Every IP data packet contains a source address (sender) and a destination
address (recipient). Each IP address consists of 32-bits that are arranged into four 8-bit
“octets” (x.x.x.x). IP addresses range from 0.0.0.0 to 255.255.255.255.
IPS (Images Per Second)
A measurement of the rate that pictures are displayed to create a video stream. A rate of 25
IPS (PAL) or 30 IPS (NTSC) is generally considered to be full motion video.
IRE (Institute of Radio Engineers)
A measurement of video amplitude that divides the area from the bottom of sync to peak
white level into 140 equal units. 140 IRE equals 1V peak to peak. The range of active video is
100 IRE.
L
Lux
The International (SI) unit of measurement of the intensity of light. It is equal to the
illumination of a surface one meter away from a single candle.