Encyclopedia of Color Science and Technology

Living Edition
| Editors: Ronnier Luo

CIELAB for Color Image Encoding (CIELAB, 8-Bit; Domain and Range, Uses)

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DOI: https://doi.org/10.1007/978-3-642-27851-8_14-1
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Synonyms

CIE L*a*b*, CIELab, ICC L*a*b*, ICCLAB, ITULAB, Lab

Definition

Using the L*, a*, and b* coordinates of the CIELAB uniform color space as the three component values of a 24-bit digital image.

CIELAB

Overview

CIE 1976 (L*, a*, b*) color space (or CIELAB) is widely used for image encoding and processing applications as diverse as color management, gamut mapping, color interchange, and color quality evaluation. What makes CIELAB attractive for these applications is its being an approximately uniform color space. A perceptually uniform scale generally enables the most efficient use of bits and the least visible artifacts when images are digitized for viewing by human observers.

CIELAB Color Space

In CIELAB color space a color stimulus is expressed in terms of L*, a*, and b* rectangular coordinates. The entry on CIELAB gives the formulas for calculating L*, a*, b* values from the X, Y, Z tristimulus values of the color stimulus and the Xn, Yn, Zntristimulus values of the reference...

Keywords

Color Space Image Encode High Dynamic Range Color Stimulus Reference Medium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.National Archives of the UAEAbu DhabiUAE
  2. 2.Department of Electrical and Computer EngineeringUniversity of RochesterRochesterUSA