RE: Why D65 on monitors and D50 on lightbox?
RE: Why D65 on monitors and D50 on lightbox?
- Subject: RE: Why D65 on monitors and D50 on lightbox?
- From: email@hidden (Bruce Fraser)
- Date: Wed, 5 Dec 2001 10:29:32 -0700
At 9:54 AM -0600 12/4/01, Broudy, David wrote:
> -----Original Message-----
From: Jonathan Dodd [mailto:email@hidden]
Sent: Monday, December 03, 2001 6:30 PM
To: 'email@hidden'
Subject: RE: Why D65 on monitors and D50 on lightbox?
G'day ColorSyncers...
I was wondering if there is any documentation/research on why
exactly this
combination works well as opposed to your monitor being set
to D50 as theory
would suggest.
I know it works, but Im looking for some "hard" justification
rather than
> "well it works..." *G*
maybe cheaper monitors just can't reproduce D50 and D65 is really closer to
D50 on those? <shrug> well, it works anyway.
bear in mind that D50 is a tristimulus specification. Many very
different spectra add up to D50 tristimulus coordinates.
As to why D65 works, you'll have to look outside of the CIE model,
which was based entirely on comparing reflective samples.
One key factor is that when we view reflective samples, our eyes
"discount the illuminant." They can't do that with a monitor, because
the monitor is its own illuminant. Mark Fairchild at RIT has done
quite a bit of work on this. His home page is at
http://www.cis.rit.edu/fairchild/
Ther you can find citations to a lot of the current work. It's mostly
in technical journals like Color Research and Applications...
Bruce
--
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