is it useful to create CCSS measurements

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  • #140785

    Wizo
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    How much would it help and improve the calibration process to have a CCSS file measurements? I have a spectrophotometer to generate it using Argyll but I am not sure if creating the file and using it would make an improvement to the calibration?

    and what happen when I select actually from the correction menu “None” instead of any of the options, how does the calibration process actually differ?

    if someone could shed some lights on these two points, that would be great!

    #140786

    Old Man
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    It will help enough to be worth using your spectro.

    I think both the DisplayCAL main page and/or the argyllcms documentation have good information on the topic, but in sum, yes, use your spectro to create a correction (unless you have a cheap spectro and an exotic display tech like QLED or OLED, then it *might* be better to use a correction generated by someone with a better spectro). Either way, don’t use “none”

    #140787

    Ben
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    You do use none when you make a ccss.    It would really make a improvement.   There is a lot to consider so you cannot just say yes.   People need details to know your situation.    It makes big improvements in color managed apps.    Whitebalance for non-color managed apps would be perfect but without correction white is white even if not perfect.   Non ccss read white with a correction close enough with the right profile.   And I am guessing.     I never used a ccss.    Wizio hope you have a Vizio. lol   I need a ccss for a vizio v555-j01 with a TPV panel.

    #140795

    Wizo
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    @Old Man

    I have a X-Rite i1Pro 3 Spectrophotometer, and I can take  good spectral measurements. my monitor is an ASUS OLED, and I am having hard time calibrating it (sometimes it works, many others it does not!) regardless of my selection for correction whether from my own CCSS/CCMX measurements or from any other presets.

    not sure what is going wrong

    • This reply was modified 1 month ago by Wizo.
    #140796

    Wizo
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    Hey @Ben

    I do not think what you are saying about using “None” is correct.

    I understand that this selection basically determine the type of correction matrix to use during the calibration process, and selecting None would – probably- omit using any preset correction matrix, it WILL NOT generate a CCSS file just by itself!

    to generate CCSS file one must use Argyll CCXXMAKE

    • This reply was modified 1 month ago by Wizo.
    #140801

    Vincent
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    I assume that you have an i1d3 colorimeter, otherwise CCSS stuff is pointless.

    Matrix = make your colorimeter measure the same as WRGB 255 measured by spectrophotometer. Custom, not portable

    CCSS/EDR = use firmware data in i1d3 to model i1d3 “observer”, use a sample spectral power dsitribution (CCSS) to “simulate a measurement” with that observer and then with standard observer. Create a custom matrix between those measurements

    None = assume that sample CCSS has the same spectral power distribution as i1d3 “observer” stored in firware.

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    #140802

    Vincent
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    @Old Man

    I have a X-Rite i1Pro 3 Spectrophotometer, and I can take  good spectral measurements. my monitor is an ASUS OLED, and I am having hard time calibrating it (sometimes it works, many others it does not!)

    First of all check ABL behavior and drift… if display is not taht stable there is no way to model it.

    #140807

    Ben
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    I should have looked it up.  A CCSS does not use a colorimeter if I understand correctly.    https://www.argyllcms.com/doc/ccxxmake.html    .   There is an option in display Cal to make a ccss in the tools section.

    I do not remember or know CCSS and CCMX.    CCSS is used for the correction in the default ones.   I lied saying I never used a CCSS.

    #140808

    Old Man
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    Vincent’s right. OLED’s are harder to calibrate due to how dynamic they are. Mitigating that will require help from someone who’s successfully done it. I have an idea for a mod for DisplayCAL to handle this, but I’m not good at implementing these things, so, without help, it will probably be a long time before I figure it out, and even then, I’d have no idea how to release it.

    I don’t know if an i1pro3 is capable of properly capturing your OLED. If it were me, I’d probably try anyway.

    What aspect of the calibration isn’t working? If it’s white point, it could be metameric failure, which is common with OLED’s. Research using alternate white points or try a visual match with a known-good reference

    #140809

    Old Man
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    A CCSS or CCMX is made by a spectro for use with a colorimeter. They are the “corrections” we frequently discuss.

    #140812

    Wizo
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    I don’t know if an i1pro3 is capable of properly capturing your OLED. If it were me, I’d probably try anyway.

    I did make spectral measurements using the i1Pro3 and converted that into CCSS file using Argyll, but this is my first time doing so, and I am afraid of missing something.

    What aspect of the calibration isn’t working? If it’s white point, it could be metameric failure, which is common with OLED’s. Research using alternate white points or try a visual match with a known-good reference

    it is not like one specific thing, rather the whole calibration process. Meaning, one time I would run the calibration and adjust the monitor settings (brightness, contrast, R, G, B channels) and it will give me very nice report after doing calibration verification.

    and many other times, it would be very difficult to achieve anything below DE00 4.0…. and the worst part is that usually the white point is very often off (usually much higher than 6500K) depending on the adjustment of the R, G and B channels.

    I seem to be struggling with this OLED to calibrate it correctly. and sometimes I am not sure if the adapted version of DisplayCal is fully functional and giving me the correct values or there is something wrong in the reported data.

    #140813

    Wizo
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    would anyone suggest any other alternative for DisplayCal that can run smoothly on Linux with i1d just as a way to verify the behavior of DisplayCal?

    any people with similar experience?

    #140815

    Old Man
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    I don’t think there’s any good alternatives for linux, no. You could try using the argyllcms command line tools directly.

    Otherwise, on windows, there’s HCFR, which is better for calibration (with DisplayCAL being better for profiling)

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