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© National Instruments Corporation G-1 NI-IMAQ for IEEE-1394 Cameras User Manual
Glossary
A
acquisition window The image size specific to a video standard or camera resolution.
active pixel region The region of pixels actively being stored. Defined by a pixel start [relative
to the horizontal synchronization signal(HSYNC)] and a pixel count.
address Value that identifies a specific location (or series of locations) in memory.
API Application programming interface.
AQ_DONE Signals that the acquisition of a frame or field is completed.
AQ_IN_PROGRESS Signals that the acquisition of video data is in progress.
area A rectangular portion of an acquisition window or frame that is controlled
and defined by software.
array Ordered, indexed set of data elements of the same type.
aspect ratio The ratio of a picture or image’s width to its height.
B
b Bit. One binary digit, either 0 or 1.
B Byte. Eight related bits of data, an eight-bit binary number. Also denotes
the amount of memory required to store one byte of data.
buffer Temporary storage for acquired data.
C
cache High-speed processor memory that buffers commonly used instructions or
data to increase processing throughput.
chroma The color information in a video signal.