On Sun, 22 May 2005, Kai-Uwe Behrmann wrote:
Gerhard,
I forgot to mention value 255 is defined as white in cineon and value 95
as black.
Mapping 255 to white as whitepoint leaves no range above. The used curves
are defined as 8 or 16-bit unsigned integers - no fixpoint. Parametric
curves would be a choice. but I think they are valid for v4 tables only.
Maybe I give it a try.
The value 685 (in 10-bit scale) is 90% white in Cineon log. It is
true that with the recommended math from Kodak that this is equivalent
to 255 (8-bit scale) when mapped for a "computer" display with a
monitor gamma of 2.5. This seems fishy to me since sRGB white point
is likely less than 255.
Bob
======================================
Bob Friesenhahn
[EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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