Re: D vs K
Re: D vs K
- Subject: Re: D vs K
- From: "Bruce J. Lindbloom" <email@hidden>
- Date: Sat, 25 Jan 2003 15:44:59 -0600
Sven Westerlund wrote:
>
Why does several(most) monitor-cal.software give you these choices:
>
"D65, D50, 6500K, 5000K or whatever colortemp. you want"
Monitor calibration software that gives you choices like "D65" and "6500K"
actually means "the chromaticity of the D65 reference illuminant" and "the
chromaticity of a 6500K blackbody radiator." It obviously cannot modify the
spectrum of your monitor to match a D65 spectrum. Furthermore, it would not
be useful if it simply adjusted the white point to a correlated color
temperature of 6500K (for example, these two xyY values both have a
correlated color temperature of 6500K: [0.3127, 0.3290, 1.0] and [0.3263,
0.2314, 1.0], yet the second of these is a very pronounced purple, while the
first is a D65 neutral). Correlated color temperature is not good enough. A
chromaticity match is the best you can hope for.
I wrote more on this topic last December -- see message 12 of Vol 3 #528 in
the list archives.
>
So, I'll give you a leading question/statement: "I calibrate my monitor to a
>
colortemp. in K, that matches my CIE D50-standard viewingbox" Am I right?
I can't argue with that. If you can't trust the technology, trust your eyes.
--
Bruce J. Lindbloom
email@hidden
http://www.brucelindbloom.com
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