Glossary
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National Instruments Corporation
G-7
interrupt
a computer signal indicating that the CPU should suspend its current task
to service a designated activity
interrupt level
the relative priority at which a device can interrupt
I/O
input/output—the transfer of data to/from a computer system involving
communications channels, operator interface devices, and/or data
acquisition and control interfaces
IRQ
interrupt request
K
k
kilo—the standard metric prefix for 1,000, or 10
3
, used with units of
measure such as volts, hertz, and meters
K
kilo—the prefix for 1,024, or 2
10
, used with B in quantifying data or
computer memory
kbytes/s
a unit for data transfer that means 1,000 or 10
3
bytes/s
Kword
1,024 words of memory
L
library
a file containing compiled object modules, each comprised of one of more
functions, that can be linked to other object modules that make use of these
functions.
line count
the total number of horizontal lines in the picture
LSB
least significant bit
luminance
the brightness information in the video picture. The luminance signal
amplitude varies in proportion to the brightness of the video signal and
corresponds exactly to the monochrome picture.
LUT
look-up table—a selection in the IMAQ Configuration Utility that contains
formulas that let you implement simple imaging operations such as contrast
enhancement, data inversion, gamma manipulation, or other nonlinear
transfer functions
