On May 27, 2009, at 9:37 PM, Doug Kerr wrote:
> I begin by assuming that Syder3Elite has a "colorimeter screen"
> feature akin to that of OptiCAL, and this question is predicated on
> that. (Here we so far only have Spyder3Pro, thus the need to
> conjecture.)
Yes, Elite offers the Colorimeter window...
>
> When we tell the colorimeter screen to put up, for example, a color
> of 128, 128, 128, is that RGB triple fed to the video card as is, or
> is it first remapped by the profile for the display?
If you open the Colorimeter window when in the Expert Console mode,
you can turn the LUT corrections on and off at will, by checking and
unchecking the "Apply Video Correction" checkbox. With 128, 128, 128
typed into the RGB value boxes in the Colorimeter window, you can see
medium gray with your VLUTs in place, then by unchecking the box, you
can see your grays without the VLUT calibration in place. If its the
LUTs causing the case, unchecking this will eliminate the cast. If its
the profile definition, not the LUTs, causing the cast (in which case
there would only be a cast in color managed applications, not things
like Internet Explorer) then the cast would occur in both cases
(checked and unchecked), and only be removed when you choose a
different profile. But if I explain all this stuff to everyone, there
won't be anything for me to test when he sends me a copy of the
profile. <G>
Clearly Doug, you are not satisfied to be a user of color management,
you want to get under the hood, and mess with the engine. <G>
>
> In other words, if we are using this tool to see how our system
> behaves, are we seeing the calibrated display without benefit of its
> profile, or are we seeing the calibrated system with benefit of its
> profile?
Thats not sufficient distinction: "with the profile" is a state that
only exists in color managed applications. Its "with and without the
video corrections" that you are really describing...
C. David Tobie
Global Product Technology Manager
Digital Imaging & Home Theater
CDTobie@...