Glossary
©
National Instruments Corporation
G-5
H
h
Hour.
HSI
Color encoding scheme in Hue, Saturation, and Intensity.
HSL
Color encoding scheme using Hue, Saturation, and Luma information
where each image in the pixel is encoded using 32 bits: 8 bits for hue, 8 bits
for saturation, 8 bits for luma, and 8 unused bits.
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.
hue
Represents the dominant color of a pixel. The hue function is a continuous
function that covers all the possible colors generated using the R, G, and
B primaries. See also RGB.
hue offset
The value added to all hue values so that the discontinuity occurs outside
the values of interest during analysis.
Hz
Hertz. Frequency in units of 1/second.
I
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.
IC
Integrated circuit.
IEEE
Institute of Electrical and Electronics Engineers.
IMAQ
Image acquisition.
in.
Inches.
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.
