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Glossary
© National Instruments Corporation G-5 NI-IMAQdx User Manual
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.
resolution (1) The number of rows and columns of pixels. An image composed of
m rows and n columns has a resolution of n × m. This image has n pixels
along its horizontal axis and m pixels along its vertical axis; (2) The
smallest signal increment that can be detected by a measurement system.
Resolution can be expressed in bits, proportions, or a percentage of
full scale. For example, a system has 12-bit resolution, one part in
4,096 resolution, and 0.0244 percent of full scale.
RGB Color encoding scheme using red, green, and blue (RGB) color information
where each pixel in the color image is encoded using 32 bits: 8 bits for red,
8 bits for green, 8 bits for blue, and 8 bits for the alpha value (unused).
ROI Region of Interest—(1) An area of the image that is graphically selected
from a window displaying the image. This area can be used focus further
processing; (2) A hardware-programmable rectangular portion of the
acquisition window.
S
sequence Performs an acquisition that acquires a specified number of buffers, then
stops.
snap
Acquires a single image to a buffer.
syntax Set of rules to which statements must conform in a particular programming
language.
T
timeout Length of time, in milliseconds, that the driver waits for an image from the
camera before returning an error
transfer rate The rate, measured in bytes/s, at which data is moved from source to
destination after software initialization and set up operations. The
maximum rate at which the hardware can operate.
trigger Any event that causes or starts some form of data capture.