Message
Re: [colorvision_group] Spyder2 - highlights problem
2007-02-26 by CDTobie@aol.com
In a message dated 2/26/07 3:17:14 PM, florent@... writes:
If I use 97 as blue value. the spyder2 gives me 6520k.
But I see, with the blocks on the left side, that it's too blue.
So I decided to set the blue value to 62, to visually have all gray
patches on the left. I measure again and I have 6502k. A great value
difference, a great visual value, but a little temperature
difference...
Color temperature is a funny thing. Big sounding K variations (hundreds of degrees!) are actually tiny, tiny fractional Little x, Little y variations, and its a one dimensional line through a three dimensional colorspace, so may not describe things terribly well. If you offered to paint someone's living room, and the only choices you offered them was on a "warm to cool" scale, they would probably complain, but thats the scale we typically use for color temperature...
C. David Tobie
Product Technology Manager
ColorVision Business Unit
Datacolor Inc.
CDTobie@...
www.colorvision.com
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