Re: Photoshop 6/7 problems with OptiCAL (or Photocal) profiles
Re: Photoshop 6/7 problems with OptiCAL (or Photocal) profiles
- Subject: Re: Photoshop 6/7 problems with OptiCAL (or Photocal) profiles
- From: "Bruce J. Lindbloom" <email@hidden>
- Date: Mon, 17 Feb 2003 11:21:47 -0600
C. David Tobie wrote:
>
Thats the difference between theory and empirical results; the concept of a
>
delta-e is useful until you extrapolate it to the edges of the range. I find
>
that a similar xy variation to be most visible in red primary, less in
>
green, and least in blue, to the degree that the delta-e values you note
>
could indeed indicate a variation that would be barely visible; and most
>
visible in in the red... Whether I find that to be the case won't be
>
something I worry much about until I have the two versions of the same
>
monitor profile to compare, as the theory doesn't mesh well with the
>
reality.
The whole point of this OptiCAL problem is that in effect, the software is
introducing a color measurement error when measuring the red, green and blue
phosphors, of 8, 11 and 17 delta E, respectively, even if the hardware
instrument itself had no error at all. That is a fact. You're saying that
this amount of error is not significant to the eye. There are others who
have said it *is* significant. I'm not going to argue with anyone about it,
but it looks to me like like errors of this magnitude may be significant. To
each his own.
--
Bruce J. Lindbloom
email@hidden
http://www.brucelindbloom.com
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