> Also, if you want to see what kinds of differences we are talking about, go
> to Bruce Lindbloom's site <http://brucelindbloom.com/> and navigate to the
> color difference calculator. Put in any pair of colors and you will see the
> color difference as calculated by many of the formulas. The differences you
> will should be a good indication of why you need to specify which formula
> you used..
I'm aware of the differences between dEab and dE2000 (and 94). I've been
tracking the colorimetric stability of a pair of Epson printers for the last
16 monts through an ECIr chart. If I plot the dE over time using the ab
formula, I get much worse result than if I use the 2000 or 94 formula. The
worst offender is the yellow, followed by magenta, cyan and black.
But, as much as I trust the empirically developped weighting behing 2000 I
still feel edgy looking at the graph of dEab over time. That's why, to
supplement the numerical analysis, I've started to run a set of CMYK images
alongside the ECIr target to see how well the numbers agree with the visual.
Roger Breton
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/colorsync-users/email@hidden
This email sent to email@hidden
