Datacolor User to User Support Group.

2 different brand monitors should not calibrate identical, correct?

on same pc?

On Aug 27, 2009, at 6:52 PM, ejc_1@... wrote:

> 2 different brand monitors should not calibrate identical, correct?
>
> on same pc?

The idea (well, one idea)  of calibration and profiling displays is to  
match them, as closely as possible, to each other. If side by side  
matching is required, rather than the more relative type of matching  
that general calibration offers, then StudioMatch (available in  
Spyder3Elite only) would be used to define a single white luminance  
level for all the involved displays. Ideally one would also match  
black luminance levels, but not all displays offer the controls needed  
to do so. Once an appropriate target has been generated and all the  
displays calibrated to it, then they are as close as possible on a  
calibration level (hardware adjustments, and video card adjustments).  
Next the profile for each display must be utilitized by a color  
managed application that is capable of multiple display profiling  
(Photoshop is the usual example).

Several of the stumbling blocks that that people often run into:

They want to do the unreasonable, such as match a CRT to an LCD.  
(Attempt to match only similar display types).

They forget about gamut limits, and try to match fully saturated  
colors that are outside the gamut of one or more of the displays. (Use  
in-gamut colors for testing matching).

They expect perfect matching in non-color managed locations. (Like on  
the Windows desktop, or in Internet Explorer).

They are using a system which does not offer the necessary control to  
fully color manage multiple displays. (Typically Windows with only one  
videocard).

They assume that matching should be so perfect that the eye can't  
distinguish a difference. (The eye is amazingly good at this, and can  
often distinguish, even after careful calibration).

They are using displays with significantly different blacks, and no  
controls for adjusting blacks. (Attempt to match only similar display  
types). Which brings us back around to the first comment again...


C. David Tobie
Global Product Technology Manager
Digital Imaging & Home Theater
CDTobie@...

Thanks




--- In datacolor_group@yahoogroups.com, C D Tobie <CDTobie@...> wrote:

>
> 
> On Aug 27, 2009, at 6:52 PM, ejc_1@... wrote:
> 
> > 2 different brand monitors should not calibrate identical, correct?
> >
> > on same pc?
> 
> The idea (well, one idea)  of calibration and profiling displays is to  
> match them, as closely as possible, to each other. If side by side  
> matching is required, rather than the more relative type of matching  
> that general calibration offers, then StudioMatch (available in  
> Spyder3Elite only) would be used to define a single white luminance  
> level for all the involved displays. Ideally one would also match  
> black luminance levels, but not all displays offer the controls needed  
> to do so. Once an appropriate target has been generated and all the  
> displays calibrated to it, then they are as close as possible on a  
> calibration level (hardware adjustments, and video card adjustments).  
> Next the profile for each display must be utilitized by a color  
> managed application that is capable of multiple display profiling  
> (Photoshop is the usual example).
> 
> Several of the stumbling blocks that that people often run into:
> 
> They want to do the unreasonable, such as match a CRT to an LCD.  
> (Attempt to match only similar display types).
> 
> They forget about gamut limits, and try to match fully saturated  
> colors that are outside the gamut of one or more of the displays. (Use  
> in-gamut colors for testing matching).
> 
> They expect perfect matching in non-color managed locations. (Like on  
> the Windows desktop, or in Internet Explorer).
> 
> They are using a system which does not offer the necessary control to  
> fully color manage multiple displays. (Typically Windows with only one  
> videocard).
> 
> They assume that matching should be so perfect that the eye can't  
> distinguish a difference. (The eye is amazingly good at this, and can  
> often distinguish, even after careful calibration).
> 
> They are using displays with significantly different blacks, and no  
> controls for adjusting blacks. (Attempt to match only similar display  
> types). Which brings us back around to the first comment again...
> 
> 
> C. David Tobie
> Global Product Technology Manager
> Digital Imaging & Home Theater
> CDTobie@...
> 
> 
> 
> Datacolor
> www.datacolor.com/Spyder3
>