Re: perception and measurement
Re: perception and measurement
- Subject: Re: perception and measurement
- From: Graeme Gill <email@hidden>
- Date: Thu, 20 Nov 2008 08:42:52 +1100
Roger Breton wrote:
That is very interesting Graeme. I think it is clear that, with time, the
1931 Standard Observer is going to become obsolete, in favor of a
physiologically-based Standard Observer predicated on cone fundamentals --
why didn't I attend CIC this year ?
I think this is actually unlikely in most situations. The usual
1931 observer will almost certainly be the default for most work,
particularly that involving smooth spectra such as printing,
simply because there is no compelling reason to change.
For those with more critical requirements, particularly when they
involve more spiky spectra, then an improved set of CMFs may be
of sufficient interest to use.
One of the things that I'm interested in looking at is to allow
better interchangeability of ICC profiles that use alternative
observers and/or illuminants. One way of doing this would be
to have a means of labelling such alternative PCSs in the ICC
profile by including the CMFs and illuminant used, and if the
A2B table is supplemented by a D2S table (float to spectral).
This would allow a CMM to at least know whether two alternate
PCS profiles are compatible (do their CMFs and illuminants match ?),
or a slightly smarter CMM to use the D2S table to compute a source
with the same CMFs and illuminant, to force them to match.
Currently, making the above work is strictly up to the user.
When & if the CMFs for the Stockman & Sharpe fundamentals
become available (perhaps they will be known as the CIE2007 CMFs),
I'll add them to the CMFs that Argyll supports.
Graeme Gill.
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden