[OpenJDK 2D-Dev] Missing colour profiles
aph at redhat.com
Thu Apr 10 09:53:46 UTC 2008
Phil Race wrote:
> I guess rather than sending several hundred kbytes of binaries to
> the list, you could just email them directly to someone here at Sun.
> You can send them to me if you like.
> You can send both pycc.pf's but most likely the 229K byte PYCC one
> is the one that will get used. The existing one from Kodak is 270K
> so 229K isn't a surprise.
> Can you be more specific about which public data from Kodak was used.
Fully Utilizing Photo CD Images
Article No. 4 - PhotoYCC Color Encoding and Compression Schemes
One other thing I should mention: the profile I've created for PYCC is
only in the domain 0 <= R, G, B <= 1 for the CCIR-709 Reference
Primaries. In theory negative values and values greater than 1 are
possible for colours outside the CCIR-709 gamut but this would make
the profile either larger or less accurate and in most cases these
extreme values will never occur.
Also, my profile does not give the same exact values as Kodak's.
Their profile seems to be rather nonlinear and has some tonal shifts.
The only way I could possibly replicate that profile would be to copy
their curves, and that would make my profile a derived work, which I'm
not willing to do. I believe that my profile does meet the published
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