Re: [Openexr-devel] Embedding ICC profiles in OpenEXR

[Chris Cox]

HDR handling CMMs: Adobe CMM, Apple CMM, and the Microsoft Vista color
system (according to the documentation)

Others I don't know about.

But handling HDR images with a Matrix-TRC (with gamma 1.0) profile is simple
- and what Photoshop CS2 does for 32 bit/channel images.

Chris



On 11/22/05 12:38 AM, "Kai-Uwe Behrmann" <address@hidden> wrote:

> Am 22.11.05, 02:35 -0500 schrieb Geraldine Joffre:
> 
>>> The same is possible with TIFF and I think as well with PNG.
>> Yes but both offer the option of embedding an ICC profile as well. I'm not
>> asking for removing the
>> current chormaticities attribute but for adding the ability to embed ICC
>> profiles as well. This way,
>> the OpenEXR format can be handled similarly as other image formats that color
>> managed 
>> applications are supporting.
> 
> What CMMs are known, that handle HDR content properly, including
> support of:
> o floating point precission,
> o a value range greater than one and possibly lower than zero.
> ?
> 
> Without such a CMM, ICC profiles could only be used for displaying or
> could easily degrade the content by integer math manipulations.
> 
> Wich CMM is used in Photomatix?
>