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Author Topic: Dual NEC Monitors, SVII, Visual Whitepoint March, SRGB  (Read 2296 times)

Steve Weldon

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Dual NEC Monitors, SVII, Visual Whitepoint March, SRGB
« on: September 01, 2011, 12:59:41 am »

Lately, I'm spending a lot of time preparing images for mu site, and the web of course is SRGB.  I have two NEC LCD2690uxi2's mounted on a dual head stand which positions them perfectly.

The problem is, after calibration for SRGB, while the colors match, the white points do not.  There is a visual mismatch, and it's only affect, is it's irritating every time you have a window with a white/light color spanned across both monitors or even close to the joining edges.

Spectraview II provides a way to adjust the white point for a visual match, but.. when the SRGB color gamut is selected in the "edit target" area.. the "white point" adjustment area is grayed out.  Choosing any other gamut but SRGB allows the white point to be edited.

Yes, a visual match as far as the white/light windows then becomes possible, measured, and profiled.  The white/light windows now look the same.

The problem is the monitor you edited is now using the full gamut of the monitor, which isn't suitable for web/SRGB use.  

I'm sure everyone with dual monitors is fully aware of this issue.  Why I'm posting, is to see if any of those people have some up with a workaround to achieve a visual match while still maintaining the SRGB gamut?  

« Last Edit: September 01, 2011, 03:12:55 pm by Steve Weldon »
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digitaldog

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Re: Dual NEC Monitors, SVII, Visual Whitepoint March, SRGB
« Reply #1 on: September 01, 2011, 09:55:09 am »

Lately, I'm spending a lot of time preparing images for site, and the web of course is SRGB. 

No, not really. We upload sRGB to the web because most web browsers are not color managed and sRGB is supposed to describe/define the ‘typical’ display in this condition. And sRGB is based on a CRT display with specific phosphors circa 1993 or so.

The reason you can’t adjust the sRGB settings is its trying to produce sRGB as its defined. But that isn’t going to help you anyway. Might get closer (certainly than the wide gamut behavior). And it tells you nothing about what those images will look like to others viewing them on the web in non color managed browsers.
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Steve Weldon

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Re: Dual NEC Monitors, SVII, Visual Whitepoint March, SRGB
« Reply #2 on: September 01, 2011, 10:25:06 am »

No, not really. We upload sRGB to the web because most web browsers are not color managed and sRGB is supposed to describe/define the ‘typical’ display in this condition. And sRGB is based on a CRT display with specific phosphors circa 1993 or so.

The reason you can’t adjust the sRGB settings is its trying to produce sRGB as its defined. But that isn’t going to help you anyway. Might get closer (certainly than the wide gamut behavior). And it tells you nothing about what those images will look like to others viewing them on the web in non color managed browsers.
This is a much more accurate way of explaining why we use SRGB on the web.  Thank you, it's good to read this over again from time to time.  Not much we can do about those with non-color managed browsers, though I am happy to see as I view 'known' images I prepared on different non-color managed systems that they are very close.  

So you're saying that NEC restricts adjustments on the SRGB setting.. to maintain the SRGB standard?   No way around that?  

It might be interesting to note that when I ordered these two monitors that one came in about a month before the other (it's hard to get this sort of monitor in Thailand) and when the second came in the visual mismatch was profound until the second monitor had about 400 hours on it.  Then they were very close using just SRGB.  Now at roughly 7000 hours they're back to being more of a mismatch than before.
« Last Edit: September 01, 2011, 03:13:41 pm by Steve Weldon »
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digitaldog

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Re: Dual NEC Monitors, SVII, Visual Whitepoint March, SRGB
« Reply #3 on: September 01, 2011, 10:28:49 am »

So you're saying that NEC restricts adjustments on the SRGB setting.. to maintain the SRGB standard?   No way around that? 

Only if you force it to a preset sRGB calibration. sRGB is sRGB.

Go into Photoshop’s Color Settings. Open any RGB working space (like sRGB). Alter any value like the xy values. Its not sRGB anymore.
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Pat Herold

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Re: Dual NEC Monitors, SVII, Visual Whitepoint March, SRGB
« Reply #4 on: September 01, 2011, 01:02:54 pm »

You could take a look at NEC's MultiProfiler app.  This will profile the display without using a puck, but it has a lot of flexibility to choose your gamut, white point, etc.  You can even choose to use the specific sRGB gamma (which is a little different from 2.2.)  So theoretically you could end up with something that is close to sRGB but with a custom white point.
http://www.necdisplay.com/multiprofiler/
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Steve Weldon

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Re: Dual NEC Monitors, SVII, Visual Whitepoint March, SRGB
« Reply #5 on: September 01, 2011, 03:11:27 pm »

Only if you force it to a preset sRGB calibration. sRGB is sRGB.

Go into Photoshop’s Color Settings. Open any RGB working space (like sRGB). Alter any value like the xy values. Its not sRGB anymore.
Okay.. sure, if you alter sRGB it's no longer sRGB strictly speaking.  On the other hand, if I have two LCD2690uxi2's profiled to sRGB, same values, same puck, same procedures, and they end up with different white points.. then which one is the 'real' sRGB?  (rhetorical of course)..   Obviously there will be slight variations which for the purposes of the sRGB gamut don't amount to much if any real world difference, but it's being irritated by mismatched white points worth something?  ;o)

sRGB emulation mode imo is brilliant.  It clamps down on the gamut and restricts it inside the sRGB boundaries.  All I want to do is very slightly alter the white point of either monitor so both match.  These differences wouldn't much or a real world difference either.. just once less thing to someone with OCD to be bothered by.. :)

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Steve Weldon

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Re: Dual NEC Monitors, SVII, Visual Whitepoint March, SRGB
« Reply #6 on: September 01, 2011, 03:16:04 pm »

You could take a look at NEC's MultiProfiler app.  This will profile the display without using a puck, but it has a lot of flexibility to choose your gamut, white point, etc.  You can even choose to use the specific sRGB gamma (which is a little different from 2.2.)  So theoretically you could end up with something that is close to sRGB but with a custom white point.
http://www.necdisplay.com/multiprofiler/
Thank you.  I'll take a look at this.

Do you know if you can run both SVII and Multiprofiler.. and then choose which one is supplying the info for the monitors internal LUT?
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Craig Lamson

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Re: Dual NEC Monitors, SVII, Visual Whitepoint March, SRGB
« Reply #7 on: September 01, 2011, 10:52:50 pm »

Thank you.  I'll take a look at this.

Do you know if you can run both SVII and Multiprofiler.. and then choose which one is supplying the info for the monitors internal LUT?

I thought Multiprofiler was just for the PA series of monitors
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