Re: ICC v4
Re: ICC v4
- Subject: Re: ICC v4
- From: Chris Murphy <email@hidden>
- Date: Tue, 22 Nov 2005 10:58:10 -0700
On Nov 21, 2005, at 3:31 PM, email@hidden wrote:
In a message dated 11/21/05 4:48:51 PM, email@hidden writes:
> And what is scRGB?
Microsoft's new wide gamut RGB. Basically a 16 bit linear sRGB,
with device value range of -0.5 to 7.5 (rather than 0.0 to 1.0).
I think it has been submitted as an ISO standard. I get the
impression it has been aimed at photographic input and subsequent
reproduction. (hence the large allowance for overrange or "specular
component" values.) Maybe Microsoft could be using this as their
rendering space in their XPS implementation.
I suspect that the term wcsRGB will be what Microsoft emphasises in
the future...
scRGB isn't particular to WCS. It's incorporated into GDI+ on Windows
XP, so it definitely isn't a new thing. It's formerly known as
sRGB64. It's a high-dynamic range space, something the ICC doesn't
currently have a means of supporting directly. It has wide variety of
potential usages, HDR photography as well as video editing and
compositing. Anywhere you'd want non-destructive, reversible editing,
scRGB would be useful. Although there are competing HDR spaces...
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
-------------------------------------------------------------
Co-author "Real World Color Management, 2nd Edition"
Published by PeachPit Press (ISBN 0-321-26722-2)
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