National-instruments Monochrome Image Acquisition Device NI 1410 Manual de usuario Pagina 29

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Glossary
© National Instruments Corporation G-3 NI PCI-1410 User Manual
H
HSYNC Horizontal synchronization signal. The synchronization pulse signal
produced at the beginning of each video scan line that keeps a video
monitor’s horizontal scan rate in step with the transmission of each
new line.
I
instrument driver A set of high-level software functions, such as NI-IMAQ, that control
specific plug-in computer boards. Instrument drivers are available in
several forms, ranging from a function callable from a programming
language to a virtual instrument (VI) in LabVIEW.
interlaced A video frame composed of two interleaved fields. The number of lines
in a field are half the number of lines in an interlaced frame.
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.
L
LSB Least significant bit.
LUT Lookup table. Table containing values used to transform the gray-level
values of an image. For each gray-level value in the image, the
corresponding new value is obtained from the lookup table.
M
memory buffer See buffer.
mux Multiplexer. A switching device with multiple inputs that selectively
connects one of its inputs to its output.
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