[Lcms-user] Motion picture white points (was Colour clipping)

[James B. <jr...@pi...>]

Hmmm, do you know for sure that's why they recommend it as a 
whitepoint? Seems odd to tie your viewing whitepoint to the details of 
the input side (especially since that means negative in motion 
picture). Wouldn't you want it to be based on something like the 
viewing conditions in a theatre?

Also most scanners I can think of use silicon detectors which I would 
think would have a very wavelength dependent response (blue would be 
very much lower)?

I'm not sure I'd call that a reasonable compromise, I don't think there 
is a workable compromise between those two colors. But I guess I 
wouldn't think of it in that way.

On May 23, 2005, at 2:07 PM, Bob Friesenhahn wrote:

>
> 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.