Colorimetry — Part 4: CIE 1976 Lab* colour space

Metadata

Publisher: ISO/CIE
Doc Type: Standard
Abstract: 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.
Publication Date: 2024-06-01
Link: http://iso.org/standard/74166.html
Group: CIE International Commission on Illumination

Latest version of ISO 11664-4

Document Suite — ISO 11664-4

▶ ISO/CIE 11664-4:2019 (2024-06-01)

THIS DOC [ACTIVE] [REAFFIRMED] [LATEST VERSION]

Reference this Doc

Plain text (ISO 690 compliant)

Preview:

ISO/CIE 11664-4:2019, Colorimetry — Part 4: CIE 1976 L*a*b* colour space. Available at http://iso.org/standard/74166.html

Snippet:

ISO/CIE 11664-4:2019, Colorimetry — Part 4: CIE 1976 L*a*b* colour space. Available at http://iso.org/standard/74166.html

Undated variant

Preview:

ISO/CIE 11664-4, Colorimetry — Part 4: CIE 1976 L*a*b* colour space. Available at http://iso.org/standard/74166.html

Snippet:

ISO/CIE 11664-4, Colorimetry — Part 4: CIE 1976 L*a*b* colour space. Available at http://iso.org/standard/74166.html

HTML (ISO 690 compliant)

Preview:

ISO/CIE 11664-4:2019, Colorimetry — Part 4: CIE 1976 L*a*b* colour space. Available at http://iso.org/standard/74166.html

Snippet:

<span class="citation"><cite>ISO/CIE 11664-4:2019</cite>, Colorimetry — Part 4: CIE 1976 L*a*b* colour space. Available at <a href="http://iso.org/standard/74166.html" target="_blank" rel="noopener">http://iso.org/standard/74166.html</a></span>

Undated variant

Preview:

ISO/CIE 11664-4, Colorimetry — Part 4: CIE 1976 L*a*b* colour space. Available at http://iso.org/standard/74166.html

Snippet:

<span class="citation"><cite>ISO/CIE 11664-4</cite>, Colorimetry — Part 4: CIE 1976 L*a*b* colour space. Available at <a href="http://iso.org/standard/74166.html" target="_blank" rel="noopener">http://iso.org/standard/74166.html</a></span>

SMPTE's HTML Pub

Preview:

ISO/CIE 11664-4:2019, Colorimetry — Part 4: CIE 1976 L*a*b* colour space
url: http://iso.org/standard/74166.html

Snippet:

<li>
<cite id="bib-iso-11664-4-2019">ISO/CIE 11664-4:2019</cite>, Colorimetry — Part 4: CIE 1976 L*a*b* colour space
<a>http://iso.org/standard/74166.html</a>
</li>

Undated variant

Preview:

ISO/CIE 11664-4, Colorimetry — Part 4: CIE 1976 L*a*b* colour space
url: http://iso.org/standard/74166.html

Snippet:

<li>
<cite id="bib-iso-11664-4-2019">ISO/CIE 11664-4</cite>, Colorimetry — Part 4: CIE 1976 L*a*b* colour space
<a>http://iso.org/standard/74166.html</a>
</li>