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Area Lighting / Colorimetry

IEV ref845-03-57

Symbol
ΔE*ab

en
CIE 1976 L* a* b* colour difference
CIELAB colour difference
the difference between two colour stimuli defined as the Euclidean distance between the points representing them in the L* a* b* space and calculated as equation

Δ E ab = [ ( Δ L ) 2 + ( Δ a ) 2 + ( Δ b ) 2 ] 1/2 MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaGWaaiab=r5aejaadweadaqhaaWcbaGaamyyaiaadkgaaeaacqGHxiIkaaGccqGH9aqpdaWadaqaamaabmaabaGae8hLdqKaamitamaaCaaaleqabaGaey4fIOcaaaGccaGLOaGaayzkaaWaaWbaaSqabeaacaaIYaaaaOGaey4kaSYaaeWaaeaacqWFuoarcaWGHbWaaWbaaSqabeaacqGHxiIkaaaakiaawIcacaGLPaaadaahaaWcbeqaaiaaikdaaaGccqGHRaWkdaqadaqaaiab=r5aejaadkgadaahaaWcbeqaaiabgEHiQaaaaOGaayjkaiaawMcaamaaCaaaleqabaGaaGOmaaaaaOGaay5waiaaw2faamaaCaaaleqabaGaaGymaiaac+cacaaIYaaaaaaa@532F@

Note – The CIE 1976 a, b hue-difference may be calculated as follows:

CIE 1976 a, b hue-difference: ΔH*ab = [(ΔE*ab)2 − (ΔL*)2 − (ΔC*ab)2]1/2


[SOURCE: CIE-Publication No. 15.2]


fr
différence de couleur L* a* b* CIE 1976, f
différence de couleur CIELAB, f
différence entre deux stimulus de couleur, définie par la distance euclidienne entre leurs points représentatifs dans l'espace L* a* b* et calculée par l'équation

Δ E ab = [ ( Δ L ) 2 + ( Δ a ) 2 + ( Δ b ) 2 ] 1/2 MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaGWaaiab=r5aejaadweadaqhaaWcbaGaamyyaiaadkgaaeaacqGHxiIkaaGccqGH9aqpdaWadaqaamaabmaabaGae8hLdqKaamitamaaCaaaleqabaGaey4fIOcaaaGccaGLOaGaayzkaaWaaWbaaSqabeaacaaIYaaaaOGaey4kaSYaaeWaaeaacqWFuoarcaWGHbWaaWbaaSqabeaacqGHxiIkaaaakiaawIcacaGLPaaadaahaaWcbeqaaiaaikdaaaGccqGHRaWkdaqadaqaaiab=r5aejaadkgadaahaaWcbeqaaiabgEHiQaaaaOGaayjkaiaawMcaamaaCaaaleqabaGaaGOmaaaaaOGaay5waiaaw2faamaaCaaaleqabaGaaGymaiaac+cacaaIYaaaaaaa@532F@

Note – La différence de teinte a, b CIE 1976 peut être calculée comme suit:

différence de teinte a, b CIE 1976: ΔH*ab = [(ΔE*ab)2 − (ΔL*)2 − (ΔC*ab)2]1/2


[SOURCE: Publication CIE N° 15.2]


ar
المواصفة القياسية للفرق بين الألوان للجنة الإنارة الدولية

de
L* a* b* Farbabstand CIE 1976, m
CIELAB-Farbabstand, m

es
diferencia de color CIELAB

fi
CIE:n vuoden 1976 Lab-väriero
CIELAB-väriero

it
differenza di colore L a b CIE 1976
differenza di colore CIELAB

ko
시아이이 1976 엘에이비이 색차

ja
CIE 1976 L* a* b*色差

no
nb CIE 1976 L* a* b* fargeforskjell, CIELUV-fargeforskjell

nn CIE 1976 L* a* b* fargeskilnad, CIELAB-fargeskilnad

pl
różnica barw CIE 1976 (L*, a*, b*)
różnica barw CIELAB

pt
diferença de cor L*a*b* CIE 1976
diferença de cor CIELAB

sv
CIELAB-färgdifferens

Publication date: 1987
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