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Glossary
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National Instruments Corporation
G-3
L
LUT
Look-up 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 look-up table.
M
memory buffer
See
N
NI-IMAQ
Driver software for National Instruments IMAQ hardware.
NVRAM
Nonvolatile RAM. RAM that is not erased when a device loses power or is
turned off.
P
PCI
Peripheral Component Interconnect. A high-performance expansion bus
architecture originally developed by Intel to replace ISA and EISA. PCI
offers a theoretical maximum
of 133 Mbytes/s.
pixel
Picture element. The smallest division that makes up the video scan line;
for display on a computer monitor, a pixel’s optimum dimension is square
(aspect ratio of 1:1, or the width equal to the height).
pixel clock
Divides the incoming horizontal video line into pixels.
R
real time
A property of an event or system in which data is processed as it is acquired
instead of being accumulated and processed at a later time.
ribbon cable
A flat cable in which the conductors are side by side.
ROI
Region of interest. An area of the image from a window displaying the
image.