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  • BSI
    BS EN ISO/CIE 11664-4:2019 - TC Tracked Changes. Colorimetry - CIE 1976 L*a*b* colour space
    Edition: 2020
    $387.95
    / user per year

Description of BS EN ISO/CIE 11664-4:2019 - TC 2020

This document specifies a method of calculating the coordinates of the CIE 1976 L*a*b* colour space, including correlates of lightness, chroma and hue. It includes two methods for calculating Euclidean distances in this space to represent the perceived magnitude of colour differences.

This document is applicable to tristimulus values calculated using colour-matching functions of the CIE 1931 standard colorimetric system or the CIE 1964 standard colorimetric system. This document can be used for the specification of colour stimuli perceived as belonging to a reflecting or transmitting object, where a three-dimensional space more uniform than tristimulus space is required.

This document does not apply to colour stimuli perceived as belonging to an area that appears to be emitting light as a primary light source, or that appears to be specularly reflecting such light.

This document is applicable to self-luminous displays, such as cathode ray tubes, if they are being used to simulate reflecting or transmitting objects and if the stimuli are appropriately normalized.

Calculating the reverse transformation is shown in Annex A.



Standard NumberBS EN ISO/CIE 11664-4:2019 - TC
TitleTracked Changes. Colorimetry - CIE 1976 L*a*b* colour space
StatusDefinitive
Publication Date2020-02-24
DescriptorsColour, Colorimetric characteristics, Coordinates (mathematics), Mathematical calculations, Optical properties of materials, Colorimetry
ICS17.180.20 Colours and measurement of light
CommitteeEL/1
ISBN978-0-539-07506-9
PublisherBSI
Pages0

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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