ISO 11664-4:2008

Colorimetry — Part 4: CIE 1976 L*a*b* Colour space ISO 11664-4:2008

Publication date:   Nov 7, 2008

95.99 Withdrawal of Standard   Jun 19, 2019

General information

95.99 Withdrawal of Standard   Jun 19, 2019

ISO

CIE International Commission on Illumination

International Standard

17.180.20   Colours and measurement of light

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Scope

ISO 11664-4:2008 specifies the 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.
ISO 11664-4:2008 is applicable to tristimulus values calculated using colour-matching functions of the CIE 1931 standard colorimetric system or the CIE 1964 standard colorimetric system. ISO 11664-4:2008 may 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. It 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. ISO 11664-4:2008 does apply to self-luminous displays, like cathode ray tubes, if they are being used to simulate reflecting or transmitting objects and if the stimuli are appropriately normalized.

Life cycle

PREVIOUSLY

ABANDON
ISO/FDIS 11664

NOW

WITHDRAWN
ISO 11664-4:2008
95.99 Withdrawal of Standard
Jun 19, 2019

REVISED BY

PUBLISHED
ISO/CIE 11664-4:2019

Relations

Adopted from CIE S 014-4/E:2007