Re: formula DeltaE2000
Re: formula DeltaE2000
- Subject: Re: formula DeltaE2000
- From: Paul Yntema via colorsync-users <email@hidden>
- Date: Thu, 29 Aug 2024 08:24:11 +0000
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- Thread-topic: formula DeltaE2000
Hi Alexey,
Txs for your message! Now I am sure this is the good value!
My problem is solved today, I have made a good formula in javascript that makes
a correct output value.(2.869712364)
grz. Paul
> Op 29 aug. 2024, om 09:53 heeft Alexey Gribunin via colorsync-users
> <email@hidden> het volgende geschreven:
>
> Hello Paul!
>
> Correct value is deltaE00 2,87
> deltaE00 5,74 is wrong.
>
> I've faced with the same error in dE2000 function for Octave.
> The mistake was in formulas for dL', dC' and dh' calculation, there should be
> simple subtraction (i.e dL'=L2-L1, dC'=C2'-C1'), but wrong function had
> modulos of the subtractions there, i.e. dL'=ABS(L2-L1) etc.)
> Hope this helps.
>
> Best regards,
> Alexey Gribunin.
>> Can somebody tell me that the outcome of deltaE00 2,87 or deltaE00 5,74 is
>> correct with the next values:
>> - reference L=41,880 a=3,500 b= -33,190
>> - measure L=40,488 a=9,092 b= -37,342
>> I try to use the formula in a PHP or javascript environment but I think
>> there is a small error in it?
>> Maybe someone has the right formula for me.
>> Thanks in advance!
>> grz. Paul Yntema
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