Re: MS Color Control Applet
Re: MS Color Control Applet
- Subject: Re: MS Color Control Applet
- From: Marco Ugolini <email@hidden>
- Date: Tue, 27 Jun 2006 01:02:43 -0700
In a message dated 6/23/06 5:54 AM, Olivier Desmaison wrote:
> I have checked this page :
> http://www.microsoft.com/windowsxp/using/digitalphotography/prophoto/colorcont
> rol.mspx
> and found the most puzzling graph I have ever seen.
> It shows Adobe RGB is wider in some L* than Prophoto. I downloaded the
> applet, tested and found the same.
> I have always believed Prophoto is wider in any cases.
> Your thoughts ?
Hi Olivier.
When people refer to ProPhoto RGB as a wide-gamut space, one tends to think
that since it's purported to be "larger than AdobeRGB", it must *encompass*
it all the way around. That assumption is incorrect: there is a relatively
small but noticeable range of cyans and purples in AdobeRGB that falls
outside the gamut of ProPhoto RGB.
As it is also incorrect to say that "RGB is larger than CMYK", when in fact
there are colors achievable in even a reasonably common color space like US
Web Coated (SWOP) v2 that are outside the gamut of sRGB and of most displays
(precisely, a certain range of greens and cyans).
I think it's always best not to take statements like those at face value,
and instead use utilities like ColorThink to examine for oneself how these
color spaces are shaped and really work.
Regards.
--------------
Marco Ugolini
Mill Valley, CA
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