Glossary
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National Instruments Corporation
G-5
pixel count
The total number of pixels between two horizontal synchronization signals.
The pixel count determines the frequency of the pixel clock.
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
The smallest signal increment that can be detected by a measurement
system. Resolution can be expressed in bits, in proportions, or in percent 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. A hardware-programmable rectangular portion of the
acquisition window.
RS-170
The U.S. standard used for black-and-white television.
RSE
Referenced single-ended. All measurements are made with respect to
a common reference measurement system or a ground. Also called a
grounded measurement system.
S
saturation
The amount of color pigment present. The lower the saturation, the more
white is present in the color. Pink is a red with low saturation.
scatter-gather DMA
A type of DMA that allows the DMA controller to reconfigure on-the-fly.
SDRAM
Synchronous dynamic RAM.
T
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.
