Federal Agencies
Digitization Guidelines Initiative

Home >  Glossary > L

Glossary: L

 “Search Glossary” button searches only the glossary. Temporary note: search not enabled for two- and three-character terms; browse by alphabet.
 “Search“ button at the top right of the page searches the Web site, not the glossary.

Suggest a term

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

LabVIEW is a graphical programming environment sold by National Instruments. LabVIEW is primarily used in engineering and scientific applications. In addition to creating stand-alone applications, it can be used to communicate with hardware such as vision, data acquisition, and motion control devices. LabVIEW has various extra modules and toolkits. Of particular interest to…
See Visible spectrum
Line art
An image that consists of distinct straight and curved lines placed against a (usually plain) background, without gradations in shade or hue to represent two-dimensional or three-dimensional objects.…
Linear Pulse Code Modulation
Pulse code modulation (PCM) with linear quantization. Applies to many types of signals; defined here for audio. PCM is a digital representation of an analog signal where the magnitude of the signal is sampled regularly at uniform intervals, then quantized to a series of symbols in a digital (usually binary) code.…
See Pulse code modulation
Local Thresholding
See Thresholding, adaptive
Lookup Table
A cross-referenced table that links an output value to every possible input value, which enables programs to make calculations very quickly. This is beneficial for evaluating and correcting color spaces.…
See Also Color space; Profile
Lossless compression
See Compression, lossless
Lossy compression
See Compression, lossy
See Linear Pulse Code Modulation
Luminance is the physical measure of brightness. The standard unit of luminance is candela per square meter (cd/m2).…
Luminous intensity
A measure of the energy emitted by a light source in a particular direction.…
LZW (Lempel-Ziv-Welch) Image Compression Encoding. A lossless compression algorithm for digital data of many kinds. LZW is based on a translation table that maps strings of input characters into codes.…
See Compression (data)