[Bf-committers] On Format Woes

[Ton Roosendaal]

Hi Andrew,

Please don't cross post on mailing lists. People can join bf-vfx if they are interesting in this topic, there we can continue reviewing this!

Thanks,

-Ton-

------------------------------------------------------------------------
Ton Roosendaal  Blender Foundation   ton at blender.org    www.blender.org
Blender Institute   Entrepotdok 57A  1018AD Amsterdam   The Netherlands

On 5 Apr, 2012, at 17:53, Andrew Hunter wrote:

> Hey Everyone,
> 
> Some further notes:
> 
> The F65 viewer documentation is available here [1].
> 
> On Thu, Apr 5, 2012 at 10:51 AM, Andrew Hunter <andrew at aehunter.net> wrote:
>> Hey Ton and Sebastian,
>> 
> [...]
>> 
>> Thirdly, your comment regarding linear vs slog on export illustrates
>> that now more than ever proper colour management is essential for the
>> mango project. In an ideal case, it shouldn't matter wither you export
>> as a linear gamma encoded image or an slog encoded image. As I
>> understand it, S-Log just compresses the linear and overbright vales
>> (ie, >1) into a 0-1 range for integer formats.
> 
> According to the table on page 31 of the release notes for the F65
> Viewer app, exporting to OpenEXR is only possible with linear gamma.
> 
>> OpenColorIO already supports the F65 via Academy IIF-ACES (Image
>> Interchange Framework - Academy Color Encoding Space) workflow[3].
>> Included in that are the academy approved transforms for the F65. This
>> is an opportunity for Blender to be at the forefront of supporting the
>> latest advances in digital cinematography. Further information on ACES
>> is available from here[4].
> 
> Further more, the F65 Viewer app alows the exporting of image data
> already in ACES, no longer necessiating an Input Device Transform on
> Blender's end. It would only require the Reference Rendering Transform
> and an Output Display Transform.
> 
>> 
>> This would be however, a potentially major overhaul of how Blender
>> views image data internally. For one, finally defining a colour space
>> that we work in internally!
> 
> It was brought to my attention that Xavier Thomas has already working
> such an integration. Perhaps the developers could chime in on the
> possibility of getting this work merged to trunk.[2]
> 
> [...]
> 
> Sincerely,
> 
> Andrew
> 
> [1] https://www.servicesplus.sel.sony.com/downloads/SoftwarePLUSReleaseNotes/Release-Notes-F65RVM100.pdf
> [2] https://github.com/thmxv/blender-ocio
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