Re: Epson canned profiles
Re: Epson canned profiles
- Subject: Re: Epson canned profiles
- From: Iliah Borg <email@hidden>
- Date: Tue, 17 Apr 2018 13:46:11 -0400
> Fire up your favorite image editor.
>
> Fill half the screen with L*a*b* 6, 1, 4. Fill the other half with 7, 1, 4.
> Overlay a couple patches of 6, 0, 0 and 7, 0, 0.
>
> By your very own math, the two background halves differ by 0.85 dE
I did it and measured the actual deltaE rather than calculating it. It is 1.32.
Telling colours apart when printed ob different printers / using different
papers / different profiles is not the same as comparing two large patches side
by side.
deltaE is not a perfect perceptually uniform measure, but generally worrying
about anything below 1 dE is more like splitting hairs.
I'm sorry that this discussion came to it.
--
Best regards,
Iliah Borg
LibRaw, LLC
www.libraw.org
www.rawdigger.com
www.fastrawviewer.com
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