[Bf-committers] ASC-CDL test suite compliance

[Andrew Hunter]

Hey Julien,

Thanks for your work, but I think I've uncovered further issues with
respect to the dpx handeling.

Blender is now internally consistent [1] but the reference image
(sop_ref_image.102.dpx) is now very different from what I believe it
should be [2].

For reference, here is a screenshot of how iv (and OpenImageIO) loads
the file [3].

I will compare how the file loads in Nuke PLE to try and get some
consensus on how this should look.

I suspect that the inconsistencies we continue to experience
(particularly noticeable on the ASC-CDL transform!) have to do with
the conversion from log->lin. Perhaps with pynodes to speed along a
proof of concept, we can determine if ImBuf and the color management
code is to blame.

Cheers,

Andrew

[1] http://imgur.com/CdNZq
[2] http://imgur.com/FnnVz
[3] http://imgur.com/fGKfV

On Mon, May 16, 2011 at 4:13 PM, Julien Enche <julien.enche at gmail.com> wrote:
> Andrew,
>
> You were right, that didn't work. I've released a new patch which should
> work fine.
> Thanks for reporting !
>
> Julien
>
> 2011/5/16 Andrew Hunter <andrew at aehunter.net>
>
>> Hey Julien,
>>
>> I've compiled a build with your patch attached and I'm still noticing
>> that saved files  don't match what is displayed in the viewer.
>>
>> I've uploaded a .blend to my server [1] and posted an annotated screenshot
>> [2].
>>
>> Lets get this figured out :)
>>
>> [1]
>> http://files.aehunter.net/Blender/image-load%20difference-with-dpx-patch.blend
>> [2] http://i.imgur.com/6Sl8T.png
>>
>> On Mon, May 16, 2011 at 10:22 AM, Andrew Hunter <andrew at aehunter.net>
>> wrote:
>> > Hey Julien,
>> >
>> > That log -> rgb conversion is a whole other architechtural issue, but
>> > I'll leave that aside.
>> >
>> > Could you please test each of the three blend files from my ASC-CDL
>> > package and compare the output?
>> >
>> > Cheers,
>> >
>> > Andrew
>> >
>> > On Sat, May 14, 2011 at 11:44 AM, Julien Enche <julien.enche at gmail.com>
>> wrote:
>> >> If you're talking about the image sop_ref_input_image.1920.dpx, I get a
>> >> very bright picture (see here :
>> >> http://imageshack.us/photo/my-images/830/captureblender1.png).
>> >> This image is in Log colorspace, my code convert it automatically to RGB
>> >> so this is an expected result. GraphicsMagick and ImageMagick give the
>> >> same output (try display -colorspace RGB sop_ref_input_image.1920.dpx).
>> >>
>> >>
>> >> Le 14/05/2011 17:31, Troy Sobotka a écrit :
>> >>> Just curious Julien, does your new code work with the ASC reference
>> image
>> >>> tests Andrew posted above?
>> >>>
>> >>> With respect,
>> >>> TJS
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