On Mon, 23 May 2005, James Burgess wrote:
Kodak Cineon recommends a warmer color temperature of 5400K. See the
white paper at http://www.filmlight.ltd.uk/documents/FL-TN-00-002.pdf for
a table which lists the various color temperature standards.
This is a funny subject. 5400K is *really* red. I have access to a few film
projectors. Admittedly they are not quite like the ones in a cineplex but
their light is *no where* near this red. Sticking to the wonky color
temperature numbers (my projector is like a black body radiator, what?) the
ones I have access to are more around 6000-6300. So then, anybody know why
this is "recommended"?
The radiant energy accross the visible wavelengths is about as uniform
as it can be at 5400K so 5400K is a special case in that regard. If
you were scanning some film and your RGB sensors had similar
sensitivity, then 5400K would produce the most uniform results.
Hotter blackbody temperatures emphasize the purples and blue, while
cooler temperatures emphasize the reds. Even 6500K emphasizes the
blues a bit.
Daylight averages 6500K and incandescent lighting is around 3000K so
5400K is also a reasonable compromise in that regard.
The first thing I do when I set up a new computer monitor is to adjust
the color temperature so that it is not cranked up to an eye-ball
scalding color temperature like 9200K.
Bob
======================================
Bob Friesenhahn
[EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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