Re: reversable, but not 1D color transforms in config.ocio


ra...@...
 

Doesn't really answer your question (sorry) but.... On Transformers the director wanted sharper cg robots! so we had a sharpen shootout. The joint winners were either LAB or Log, unshapen masks.i.e. the difference between artifacts when filtering it in L*AB or log was very minimal.  It might be easier for your PS artists to use a lut rather than a RGB>LAB transform?

On Sunday, 5 February 2017 06:13:36 UTC, Troy James Sobotka wrote:
Whilst stranded in an airport...


No assurances expressed or implied. Seems the values are darn close to Lindbloom's, which may account for a different value for Illuminant C adaptation via Bradford.

With respect,
TJS

On Sat, Feb 4, 2017 at 11:58 AM doug <col...@...> wrote:
The conversion from XYZ to CIELab can be done with matrices and 1d-LUTs, so you should be able to do the forward and reverse quite exactly with the existing machinery and without resorting to 3d-LUTs.

(Of course CIELab is only appropriate for display-referred colors, but that is a separate issue.)

Doug Walker

--
You received this message because you are subscribed to the Google Groups "OpenColorIO Developers" group.
To unsubscribe from this group and stop receiving emails from it, send an email to ocio-dev+u...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Ahead of our New York launch, Finish and Realise Studios are now Freefolk.
Please update the email address you have for me.

 
+44 (0)20 7734 9110

140 Wardour Street, London W1F 8ZT

Join ocio-dev@lists.aswf.io to automatically receive all group messages.