RE: Delta H Calculations
RE: Delta H Calculations
- Subject: RE: Delta H Calculations
- From: "dpascale" <email@hidden>
- Date: Thu, 14 Dec 2017 09:42:52 -0500
Thomas,
The usual nomenclature for this space is L*C*h
Deltah is not the same as DeltaH* (or DeltaH*ab as it is sometimes referred
to in regards to the CIELAB color difference).
Deltah is the difference in angle while DeltaH* is the contribution of the
angle difference to the total error, and is equal, for the CIELAB color
difference (DeltaE*ab) to:
DeltaH*ab = SQRT(DeltaE*ab ^2 - DeltaL* ^2 - DeltaC*ab ^2)
Danny
www.babelcolor.com
-----Message d'origine-----
De : Colorsync-users
[mailto:colorsync-users-bounces+dpascale=email@hidden] De
la part de Matthew Finlay
Envoyé : 13 décembre 2017 00:00
À : Thomas Richard; email@hidden
Objet : RE: Delta H Calculations
Thanks Thomas,
So just to clarify,
Am I correct in assuming from the below that DeltaH is the absolute value
between each H value in the LCH color space?
-----Original Message-----
From: Thomas Richard [mailto:email@hidden]
Sent: Wednesday, December 13, 2017 12:48 PM
To: email@hidden; Matthew Finlay
<email@hidden>
Subject: Re: Delta H Calculations
Hello Matt,
look at Bruce Lindblooms homepage:
http://www.brucelindbloom.com/Eqn_Lab_to_LCH.html
MfG
Thomas
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