[Openicc] New Topic: data to share

edmund ronald edmundronald at gmail.com
Tue May 17 05:53:20 PDT 2011

I agree. 24 or 32 bit LAB with headroom is the way to go for archival

On Tue, May 17, 2011 at 2:27 PM, Graeme Gill <graeme at argyllcms.com> wrote:

> Scott Geffert wrote:
>> When we assume sRGB in any part of the imaging workflow we are essentially
>> clipping
>> many colors that most modern printers (and even displays) can reproduce.
>> In fact, Adobe
>> RGB clips about 10% of these very printable colors which to me is
>> unacceptable. When
>> you are discussing "internal" spaces or untagged spaces for "no color
>> management" I
>> would argue that sRGB is not the way to go and many feel that ProPhotoRGB
>> is too large
>> but eciRGBv2 is ideal. It is L* based, it has a 5000k white point and the
>> gamut is
> There is no compunction to use RGB spaces for wide gamut. Use L*a*b* or
> something
> that is inherently suitable for wide gamut (even scRGB might be better than
> any of
> the RGB spaces you mention).
> It's not a good idea to use a wide gamut space as a default space for
> "mystery meat" RGB
> either, if it doesn't match typical expectations, which are often set by
> displays.
> Looking at it statistically, your extreme measured colors are at the tail
> of the
> probability curve, and therefore could be safely ignored for most everyday
> practical
> purposes -i.e. if you are one of the few people who care about accurately
> reproducing
> such extreme colors is important to you, don't use an unlabelled colorspace
> to store the
> color values !
> Graeme Gill.
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