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I wanted to try some higher quality LEDs to see if they perform better.Īnyway, for my XPS 9570 laptop, there is an option for "Color Accuracy" in the Intel graphics control panel that is set to on by default. I guess it really does depend on the hardware used. All the colors look nice, but white doesn't really look white. I had a chance to play with a new Alienware laptop, and noticed similar things on the LEDs you can control on it. However, because we experiance color in such a relative and imprecise way all this is not in anyway obvious to us unless we start doing very careful comparisons. It is impossible to recover the real frequencies so it will never look the same as it would if you were in the room. It does not record the actual spectrum of light but only three intensities based on the response of the sensor. Ideally one would do this study on oneself, using the same primary colors as your display, and use the results as a "personal observer" instead of using a standard observer.Īlso, the camera generating the content has the same issue. This study has been redone several times over the years and the results are similar, this is why you sometimes have options for other observers, but almost everything is still designed around the 1931 results. We are currently using a "standard observer" from a 1931 study that is an average from many individuals. Every individual will match a particular mix of a particular red, green, and/or blue primary color to a different place on the visible spectrum, and this is discounting things like color blindness.
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Our hardware is now much more accurate than the differences between how we perceive mixtures of three frequencies at different intensities. You discovery that purple still doesn't look right demonstrates the major issue with RGB type fake color. Don't try to squish DCI-P3 into your display's gamut with a calibration.
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Feel free to use the 3DLUT tool to also create LUTs for the rest of madVR's supported color spaces afterward but do the profiling with the understanding that your display is BT.709. Then create a BT.709 3DLUT for madVR, targeting the native white point and level. I would put it on the BT.709 setting though, it sounds like your display has poor coverage of P3.
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However, that dell app sounds like it could be a very good thing, it is likely setting up some hardware LUT in the panel itself using this to correct the white point is similar to using RGB controls. I would target D65 (~6504K) to go with BT.709 but if your white looks white to you I suggest you not use the normal 3 hardware 1DLUTs of the video card or madVR's 3DLUT to adjust it. It is very important to always set white level to as measured unless you are trying to perfectly match two different displays for some reason.Ĭalibrating the white point is more nuanced. When calibrating a modern SDR computer display I would target the BT.709 gamut. Maybe I should target 2.6 in the calibration when I remove the app, because the gamma will shift, probably to 2.2. The Dell app also targets a 2.6 gamma with that profile selected, both for obvious reasons. I made the 3D-LUT using DCI-P3 as the source color space which targets a 2.6 gamma. White level and gamut is set to as measured.
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I'm not really sure how the app works but I'm probably going to uninstall it in favor of the more manual method.įor madVR calibration, dispcal targets P3 white point coordinates by default, so I'm guessing I should leave it alone. The gamut coverages were really bad, and so was the overall picture. I calibrated, profiled, and then made a 3d-lut for madVR while the Dell app was on the DCI-P3 setting. You can have both the Dell app and a separate calibration running at the same time. Dispcal and madTPG methods of disabling existing calibrations don't seem to have any effect on the Dell app. After doing that the delta E was ~0.6, but I'm guessing it's because it actually calibrated something.
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The app has a mini calibration tool that uses the i1 display pro to adjust the profiles based on the specific display. The white point changed very little also. It seemed to brighten things up a bit, but the actual white level didn't change much. Do I leave it as measured or target 6500k? Targeting a value actually influences decisions made during calibration right? The white point was off quite a bit tho, delta E of ~7. The display by default is really good, 3840x2160 wide gamut IPS. On my new laptop, you can't adjust RGB levels. I use the powers of :devil: to resurrect this quote!. If your white point is already as good as your example I strongly recommend you not calibrate it in software.