[Openicc] Extra metadata keys for review

[Ann McCarthy]

Chris,

There can be differences between a ROMM RGB profile and a ProPhotoRGB
profile.  E.g., a ROMM profile should be a lut profile.  The ProPhoto
profile I have seen is a matrix profile.

This highlights the fact that that two profiles based on the same standard
color space may behave differently the same, e.g., have a different
perceptual rendering.

Best regards,
Ann L McCarthy
Imaging Systems Architect
Lexmark International, Inc.



On Mon, May 7, 2012 at 5:39 PM, Chris Murphy <lists at colorremedies.com>wrote:

>
> On May 6, 2012, at 1:45 AM, Richard Hughes wrote:
> >
> > STANDARD_space                A standard space, where "srgb" -> sRGB;
> "adobe-rgb" ->
> > AdobeRGB; "prophoto-rgb" -> ProPhotoRGB
>
> ProPhotoRGB is actually a renamed version of ROMM RGB. So it makes me
> wonder if that should be used as the base, with ProPhoto RGB as the alias,
> if aliasing can be supported.
>
> Likewise sRGB is derived from ITU-R BT.709 (or Rec. 709).
>
> Likewise "adobe rgb" does not exist, it's specifically "Adobe RGB (1998)"
> and for that matter I'd quibble with wikipedia for calling it "Adobe RGB
> color space" which is not strictly correct either.
>
> Chris Murphy
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