[Bf-vfx] ASC-CDL test suite compliance

[Ton Roosendaal]

Hi,

No time to check the zip, but just to communicate:

- A developer has taken up DPX failures a month ago and will soon  
present fixed code in a patch. We copied it long ago from Cinepaint,  
and it had a lot of loose ends.
- OpenImage is part of Cycles already, and is being evaluated to be  
included in Blender too
- The new ASC-CDL spec for 'color balance' has been picked up by our  
compositor project.

Blender's color management is really in a very first stage still. Not  
sure where big errors are, probably more of a lot of todos.

Thanks, we'll keep you informed!

-Ton-

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

On 12 May, 2011, at 19:15, Andrew Hunter wrote:

> Hi Everyone,
>
> I'm posting this to both the blender development list and the blender
> vfx list as I think it is relevant to both.
>
> This package is meant to illustrate the current deficencies in Blender
> with regards to 1) DPX handling [1], 2) color management and 3)
> ASC-CDL compliance [2].
>
> I am a freelance cinematographer with a hobby interest in both open
> source software and post-production. I have had experience working
> with a colorist on already mature color grading solutions for Linux
> like Baselight and Davinci Resolve. I would love to see Blender's
> power and flexibility as a 3D modeling and compositing solution be
> extended to that of a colorist.
>
> Even before that though, Blender needs to get it's ImageIO and color
> management house in order.
>
> With in this package you will find as follows:
>
> * Example .blend files.
> * Screenshots of the tested setup.
> * Reference DPX's and the .ccc list from the ASC-CDL reference
> distribution included for convenience
> * Blender's output from the .blend files rendered as DPX
>
> For reference I have used the iv utility from the OpenImageIO project
> and their DPX implimentation as being correct and complete.
>
> OpenImageIO can be obtained from https://sites.google.com/site/openimageio/
>
> OpenImageIO was compiled from a recent trunk.
>
> If I have made any errors or omissions, please let me know. I've did
> this testing with the intent of sparking discussion.
>
> http://files.aehunter.net/Blender/Blender%20ASC-CDL%20Tests.tar.gz
>
> = Related Bug Reports =
>
> 27377 - Rendered DPX's do not match viewer [1]
> 27378 - ASC-CDL Color Balance Node does not allow for full range of  
> values [2]
>
> [1] http://projects.blender.org/tracker/index.php?func=detail&aid=27377&group_id=9&atid=498
> [2] http://projects.blender.org/tracker/?func=detail&atid=498&aid=27378&group_id=9
>
> Cheers,
>
> Andrew
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