[Bf-committers] Luminance Coefficients

Kévin Dietrich kevin.dietrich at mailoo.org
Mon Jun 9 03:41:56 CEST 2014



it depends on how you did the job. Perhaps this can be appended to my
patch: developer.blender.org/D517 ? 

I also intended to do something in this area ;) 

Le 2014-06-09 02:37, Troy Sobotka a écrit : 

> While looking through Blender's code, I noticed that there were legacy hard
> coded values for luminance.
> These are hard coded values based on the sRGB and 709 primaries, as opposed
> to the particular color spaces a given OCIO configuration may have. This
> would lead to incorrect derivation of luminance if the reference space is
> not sRGB / 709.
> I decided to patch Blender to use the reference space coefficients listed
> in the OCIO configuration file, which is relatively straightforward.
> The coefficients are summoned per pixel, which would mean having a global
> structure useful to reference them, but I don't see a relevant place to
> store them.
> It would seem logical to store them on configuration loading, reloading,
> and potentially if a set coefficients call is made.
> Where and how does it make sense to store these values in Blender's
> architecture?
> With respect,
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