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National Instruments Corporation
G-1
Glossary
A
acquisition window
The image size specific to a video standard or camera resolution.
active line region
The region of lines actively being stored. Defined by a line start (relative to
the vertical synchronization signal) and a line count.
active pixel region
The region of pixels actively being stored. Defined by a pixel start (relative
to the horizontal synchronization signal) and a pixel count.
address
Value that identifies a specific location (or series of locations) in memory.
area
A rectangular portion of an acquisition window or frame that is controlled
and defined by software.
B
brightness
A constant that is added to the red, green, and blue components of a color
pixel during the color decoding process.
buffer
Temporary storage for acquired data.
bus
A group of conductors that interconnect individual circuitry in a computer,
such as the PCI bus; typically the expansion vehicle to which I/O or other
devices are connected.
C
CCIR
Comite Consultatif International des Radiocommunications. A committee
that developed standards for video signals. Also used to describe signals,
boards, and cameras that adhere to the CCIR standards.
color space
The mathematical representation for a color. For example, color can be
described in terms of red, green, and blue; hue, saturation, and luma; or hue,
saturation, and intensity.
