Re: [Openexr-devel] Blender + OpenEXR

[Kai-Uwe Behrmann]

Ton,

ask Bob Friesenhahn. He has the probably best dpx/cineon implementation 
out there in GraphicsMagic including the 16-bit colour management via lcms 
on the output side.

While there are are a growing number of people waiting of a clear signal 
about the OpenEXR colour management effort, 16-bit integer precission 
CMM's are the only open source choice I know of. Namely lcms and argyll.
Both provide commandline tools for processing tiff's.

So, for the input side you'd need to convert first to tiff. Does 
anyone know a commandline tool for that?


regards
Kai-Uwe Behrmann
                                + development for color management 
                                + imaging / panoramas
                                + email: address@hidden
                                + http://www.behrmann.name


BTW: the www site mentioned below seems hacked or partitially down


Am 01.03.06, 11:56 +0100 schrieb Ton Roosendaal:

> Hi Florian & everyone,
> 
> Let me first say a big thanks for OpenEXR! It has proven to be very reliable
> and versatile addition to Blender, and one of the crucial success factors or
> the movie project I was working on during the past 9 months.
> 
> Check out the sneak-peek on http://orange.blender.org
> 
> Apart from integrating openexr in our regular image in/out pipeline, it now
> also is going to be used  in the core of the render pipeline, taking care of
> saving tiles for all render-layers and passes in a single file. This then in
> the end is handed over the Blender built-in compositor to do the fancy tricks
> with. Docs about this new pipeline and release is expected early april. It's
> going to be quite nice, at least for the open source community. :)
> 
> Our renderfarm (60+ dual cpu nodes), now is nicely spitting out the exr files.
> Very shortly we have to convert all of that to the format required by the HD
> digital projection in the cinema in Amsterdam.
> 
> My current information is that we have to convert this to Cineon or DPX, this
> is moved to a Quantel IQ HD/2K set, which will convert this to HDCam SR tape.
> 
> This is actually my first real experience with HD digital cinema... and I
> wondered if there ever was a follow up on the OpenEXRColorManagement.pdf you
> published. All our frames are rendered with a 'linear' RGB color space now,
> which look pretty much OK on our monitors (like the 23" Apple Cinema
> displays), but that doesn't mean anything eh. :)
> 
> I would greatly appreciate some pointers to information or tips for how to
> achieve the best quality for current 10 bits/component digital HD projection
> systems. And maybe some hints for how to convert color best to current DVD
> video formats.
> 
> All the best,
> 
> -Ton-
> 
> (Resent this mail, it was sent february 25th, but nongnu.org bounced it)
> 
> --------------------------------------------------------------------------
> Ton Roosendaal  Blender Foundation address@hidden http://www.blender.org
>