Re: Delta E 94 as new method to measure color variation
Re: Delta E 94 as new method to measure color variation
- Subject: Re: Delta E 94 as new method to measure color variation
- From: Robin Myers <email@hidden>
- Date: Thu, 07 Oct 2004 14:53:56 -0700
Chris Murphy wrote:
>
> Delta E94 is better than Delta E76, which is the original version.
The current consensus among color scientists is that the dE94 equations
are better for small color differences, ie. less than 5 dE, but that
they are not very good for large color differences, with the dE76
equations still useful for these.
<snip>
> Delta Ecmc is better than Delta E94, and
> Delta E200 (not sure if that's superscripted as 00 or 2000) is better
> than Delta Ecmc. I prefer using Delta E2000. None of them are perfect
> yet, but the algorithms are getting much better (and much more
> complex).
A word of caution is in order here. The CMC equations require specifying
some scale factors which are industry specific. These scale factors can
result in different dE results for the same colors. The dE2000
equations, as noted by Chris Murphy, are much more complex and thus the
appropriate factors used for the difference equations should be noted
along with the dE results, or nobody will be able to reproduce your
results or compare their results with yours in a meaningful manner.
Robin Myers
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