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Term entries in the full glossary starting with the letter "L"

W3C Glossaries

Showing results 41 - 45 of 45

loose coupling

From Web Services Glossary (2004-02-11) | Glossary for this source

Coupling is the dependency between interacting systems. This dependency can be decomposed into real dependency and artificial dependency:

1. Real dependency is the set of features or services that a system consumes from other systems. The real dependency always exists and cannot be reduced.

2. Artificial dependency is the set of factors that a system has to comply with in order to consume the features or services provided by other systems. Typical artificial dependency factors are language dependency, platform dependency, API dependency, etc. Artificial dependency always exists, but it or its cost can be reduced.

Loose coupling describes the configuration in which artificial dependency has been reduced to the minimum.

lossless compression

From Portable Network Graphics (PNG) Specification (Second Edition) (2003-11-10) | Glossary for this source

method of data compression that permits reconstruction of the original data exactly, bit-for-bit.

lossy compression

From Portable Network Graphics (PNG) Specification (Second Edition) (2003-11-10) | Glossary for this source

method of data compression that permits reconstruction of the original data approximately, rather than exactly.

luminance

From Portable Network Graphics (PNG) Specification (Second Edition) (2003-11-10) | Glossary for this source

formal definition of luminance is in [CIE-15.2] . Informally it is the perceived brightness, or greyscale level, of a colour. Luminance and chromaticity together fully define a perceived colour.

LZ77

From Portable Network Graphics (PNG) Specification (Second Edition) (2003-11-10) | Glossary for this source

data compression algorithm described by Ziv and Lempel in their 1977 paper [ZL] .

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