Need help with i1display

I

icor1031

[H]ard|Gawd
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May 29, 2010
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I have two CCFL CPVA monitors, and they look 'very' close to each other after using the 1idisplay pro.

However, despite the color temperature falling between both of the CPVA's - my LED AH-IPS PDC monitor always looks green, noticeable in whites and especially noticeable in gray gradients.
(The AH-IPS pulls 5500k, the CPVAs get 5400k and 5700k.)

I've tried using generic, LED, RGB LED, and CCFL settings on the colorimeter's software - no joy.



Is it incapable of handling my monitor?
 
Measure one monitors native white point. Let it profile that display to the native whitepoint. Then calibrate the other to the measured native whitepoint of the first display.
 
i think using the native whitepoint only makes sense when changing the whitepoint introduces quantization errors (banding, etc.). This would be an issue on lower bit depth panels for example.

As for original post, what do you mean by "after using the i1display pro". What exactly did you do to calibrate your display?

And if they look close to each other, why does one look greener?
 
spacediver said:
As for original post, what do you mean by "after using the i1display pro". What exactly did you do to calibrate your display?

And if they look close to each other, why does one look greener?
Click to expand...




I used the i1profiler and changed the RGB, brightness, contrast settings as it requested. Then, I saved the profile.
I don't know "why" it looks greener. I assume it's asking for more green color when getting 5500k.
 
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ALSO, is there any free software with more control than this dang i1profiler?

i.e., I can't choose the gamma, and it doesn't give me its impression of sRGB dE. Also, the gamut(?) viewer is abnormal and difficult to interpret. lol
 
After a 90m test with dispcal:

huATBOj.png




The results are plainly *much* better than the fast test I did. Skin tone is more natural, less yellow - hair isn't over saturated, etc. It's incredible. :D

Now I need to learn how to use dispcal, because I don't know what most of these settings mean - and I used 6500k instead of 5500k because I wasn't sure how to change it. I'll search for instructions.

Thanks again!
 
Okay, I can't find a useful guide for this thing.
For example, I can't learn what the difference is between:

L*a*b, curves, single curve, XYZ.

Or, Smooth B2A table size.


I found this, but it isn't telling me what many of these are.
http://www.argyllcms.com/doc/Scenarios.html



Is there a guide some where?
 
I think those options are for dispcalgui, which I believe is a GUI layer ontop of Argyll and has some of its own features.
 
Here

According to what I can understand, a single curve applies the same LUT to each of the three channels - this would be desirable if you already have a very good grayscale and just want to tweak the gamma.

And you probably want to choose LUT instead of matrix for your purposes, unless you run into banding issues.

In this thread, the recommendation is to turn off smooth B2A tables and to choose low quality B2A tables. But keep in mind this is in the context of 3dLUTs and MadVR. Not sure what those options mean. Perhaps florian (creator of dispcalgui) or graeme (creator of argyllCMS) can lend some help if you ask on the avs forum.
 
spacediver said:
Here

According to what I can understand, a single curve applies the same LUT to each of the three channels - this would be desirable if you already have a very good grayscale and just want to tweak the gamma.

And you probably want to choose LUT instead of matrix for your purposes, unless you run into banding issues.

In this thread, the recommendation is to turn off smooth B2A tables and to choose low quality B2A tables. But keep in mind this is in the context of 3dLUTs and MadVR. Not sure what those options mean. Perhaps florian (creator of dispcalgui) or graeme (creator of argyllCMS) can lend some help if you ask on the avs forum.
Click to expand...


Thanks man, my apologies for my fail google skill :D
 
According to what I can understand, a single curve applies the same LUT to each of the three channels - this would be desirable if you already have a very good grayscale and just want to tweak the gamma.
Click to expand...
This option doesn't refer to the vcgt (which is loaded into the videocard LUT) but to the gradation characterization data (TRC) of matrix based profiles. Single Curve means that a neutral input value transformed through the profile will result in a neutral PCS value (and vice versa). This has to be ensured by the calibration.
 
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icor1031 said:
That is a huge improvement, thank you.

I only get a text report of the dE, no visual report. Is there a way to see that? I like charts. ;)
Click to expand...
In the DispcalGUI interface, you can find an (i) button for information at the far right of the profile settings pull down list. That can give you charts and more detailed info.
 
Sailor_Moon said:
This option doesn't refer to the vcgt (which is loaded into the videocard LUT) but to the gradation characterization data (TRC) of matrix based profiles. Single Curve means that a neutral input value transformed through the profile will result in a neutral PCS value (and vice versa). This has to be ensured by the calibration.
Click to expand...

ah you're right - I don't think there's a single curve option for LUT based profiles.
 
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