Does DisplayCAL strip away the currently installed ICC profile before starting the profiling process? Any currently active calibration is disabled during calibration and profiling. Thank you, I understand. I suppose it’s not very proper to perform profiling atop another active profile. By the way, when interactive calibration is disabled, and all targets are set to “as measured”, DisplayCAL gives the user the option to use linear curves or not. If the user unchecks the said option, what calibration gets embedded in the ICC profile? Is it copied from the currently installed calibration?
Jun 1, 2017 - Furthermore, from NEC Display's SpectraView II's website: After calibration, the. 09:22:26,645 Serial Number: 03115157 09:22:26,647. Bought a NEC LCD2490WUXi, and then went to the NEC site and bought SpectraView II for download. Web site FAQ indicates it is available for.
• This reply was modified 1 year, 9 months ago. If so, does that mean there is no way I can get the sRGB coverage of “Spectraview-calibrated NEC PA271W + ICC profile”? If the monitor is hardware-calibrated to sRGB via internal 3D LUT, then SpectraView should install an sRGB profile, so sRGB coverage of that profile would of course be 100% when going purely by numbers. I checked the monitor, SpectraView II and MultiProfiler’s manuals and it turns out that while there is indeed a 14-bit 3D LUT hardware inside the monitor, SpectraView II (as opposed to the European SpectraView Profiler) only applies 1D correction curves into the hardware LUT. Furthermore, from NEC Display’s SpectraView II’s website: After calibration, the display is automatically profiled and highly accurate ICC/ColorSync color profiles are generated and automatically registered with the Color Management System. These profiles use the Bradford Chromaticity Adaptation matrix. So it means that the 3D LUT’s are not being used.
Worse, even the correction matrix isn’t stored in the monitor; full color correction still depends on the ICC profile being registered to the operating system. Will check later the contents of the ICC profile generated by SpectraView. If I indeed see a 3×3 transformation matrix, does it mean that proper evaluation of SpectraView II’s calibration accuracy requires the ICC profile it generated to be loaded, and therefore, I will not be able to assess its sRGB coverage through DisplayCAL’s profiling tool? Interestingly, NEC’s Multiprofiler sofware is capable of programming the 3D LUT, however, it only accepts printer profiles, which I currently don’t know how (or why) to use. • This reply was modified 1 year, 9 months ago.
If I indeed see a 3×3 transformation matrix, does it mean that proper evaluation of SpectraView II’s calibration accuracy requires the ICC profile it generated to be loaded, and therefore, I will not be able to assess its sRGB coverage through DisplayCAL’s profiling tool? Both of this can be done. You already checked the sRGB coverage. How is sRGB coverage calculated in DisplayCAL/ArgyllCMS?
Is it dependent solely on the R, G and B primaries (measured during profiling and embedded in the ICC profile)? I just find it hard to accept that my low-end US$100 monitor could get 99% sRGB coverage when calibrated and profiled using DisplayCAL, while my Spectraview-calibrated NEC PA271W can only emulate 96.3% of sRGB. If I indeed see a 3×3 transformation matrix, does it mean that proper evaluation of SpectraView II’s calibration accuracy requires the ICC profile it generated to be loaded, and therefore, I will not be able to assess its sRGB coverage through DisplayCAL’s profiling tool? Both of this can be done.
You already checked the sRGB coverage. I just reflected on this a bit, and realized, I just understood now. Thanks for the explanations. So, 96.3% sRGB coverage is a bit bad. Axt advertising arabic font style.
(And I don’t really want to use the monitor’s Native mode since it results in an oversaturated Windows GUI/desktop) • This reply was modified 1 year, 9 months ago. How is sRGB coverage calculated in DisplayCAL/ArgyllCMS? Is it dependent solely on the R, G and B primaries (measured during profiling and embedded in the ICC profile)? No, it’s true 3D volume (in L*a*b* space) calculated from the profile (which in turn is based on the measured points). I just find it hard to accept that my low-end US$100 monitor could get 99% sRGB coverage when calibrated and profiled using DisplayCAL, while my Spectraview-calibrated NEC PA271W can only emulate 96.3% of sRGB.
The low-end monitor likely has a gamut that is slightly larger than sRGB. If you would profile the NEC PA271W in native gamut mode, the coverage would likely rise.
96.3% is not a bad figure though and not worth the concern imo. How is sRGB coverage calculated in DisplayCAL/ArgyllCMS? Is it dependent solely on the R, G and B primaries (measured during profiling and embedded in the ICC profile)? No, it’s true 3D volume (in L*a*b* space) calculated from the profile (which in turn is based on the measured points). I just find it hard to accept that my low-end US$100 monitor could get 99% sRGB coverage when calibrated and profiled using DisplayCAL, while my Spectraview-calibrated NEC PA271W can only emulate 96.3% of sRGB. The low-end monitor likely has a gamut that is slightly larger than sRGB.