Re: LCD calibration
Re: LCD calibration
- Subject: Re: LCD calibration
- From: Roger Breton <email@hidden>
- Date: Tue, 07 Dec 2004 08:00:05 -0500
Kasey,
> To begin I want to use ProfileMaker's Measure Tool to calibrate the display.
OK.
> In the "Configure" box should I check the "spectral" box?
You could leave it on all the time.
> What is this option doing?
Preprocessing the data in spectral form, and then convert it into Lab or XYZ
as needed by the applications. But the raw spectral data will be stored in
the measurement file. This is the most flexible option.
> Then I go to "Calibrating Monitor" and am
> faced with several options, some I am comfortable with, others not. I am
> selecting 6500K for my white point, 1.8 Gamma, 100% brightness and LCD for
> Display Type. I do not click "Set Paper White".
OK.
> There is a reference file in Profilemaker / Reference Files / Monitor which I
> believe was made here when the system was configured (May of '03). It's the
> only reference file in the folder and displays in the MT dialog box as the
> default.
There should be two other Reference files in that folder, CRT Monitor
Reference.txt and LCD Monitor Reference 2.0.txt.
> I don't know how it was generated or where it came from.
It was generated most likely by your predecessor.
> When I select it as my
> reference I get this message "The luminance values of your reference
> monitor(107.2 Cd/m2) can not be reached by this monitor".
Right.
> Can you take a stab as to why and whether I should
> be using a reference at all?
Only in case your using more than one monitor in your workgroup and you want
to align them all on one particular unit.
> I unclick "Use Reference" and proceed to the calibration.
Good.
> Spectrolino is
> referenced out and attached to the display. The only user-controls I have for
> the display are resolution and brightness. The first operation in calibrating
> is Contrast.
OK.
> Since I
> don't have contrast control
LCD monitor?
> I just click start and the "Quality Indicator and
> reference arrows do not quite line-up so I proceed to the next step, White
> Point adjustment. I skip on to the next since I have no ability to adjust
> white point variables.
Definitely LCD.
> I skip the next dialog as well, Optimum Lightness, and move on the Luminance.
> As this involves setting Brightness levels I can actually interact with the
> process by setting the brightness to it's lowest level!
> I proceed. About 40% of the way up the Brightness slider the triangles align.
> In the following dialog I have the option of checking Desired Luminance and
> entering a luminance value.
OK.
> Should I? I didn't. The Current Luminance is 103
> and the Expected
> Luminance is 89, presumably based on the Brightness setting.
103 is a good value. I use 90 to 95 on my Eizo.
> The calibration begins and completes successfully. Not being entirely
> comfortable with the results I nevertheless proceed to Profilemaker to create
> my display profile.
Good.
> I open PM, set it to Monitor and the reference is LCD
> Monitor Reference 2.0txt
> and create the Measurement file and build my profile.
OK.
> That's it in a nutshell. I'm just not certain I have this part of the Color
> Management chain nailed down so it throws uncertainty on anything else I do.
What White point / gamma did you use for calibration?
> I hope someone can shed light.
You can always find help on this list :)
> Maybe it'll help someone else as well. Please
> reply directly to
> my email address as well as the group, if this is convenient.
> Thanks!
> ____________________
> Kevin Casey
Regards,
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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