- This topic has 5 replies, 2 voices, and was last updated 58 minutes ago by
.
-
Posts
-
I trust my eyes more than a meter without a spectrometer. Doing it by eyes and tv color filters it gives equal lumance in HCFR at the 75% primary and secondary. Red and Magenta are 5% less so figure they are off. So trust the meter lumance. Red could just be off from display correction. I did run a funny test to check blue. I turned color all to 0 in tv controls. It was black and white and ran a saturation report. All RGB was equal on all colors with a few just 1 RGB differnent. 100% red was flat with 90% and more than 5 color different in RGB thats supposed to be all the same. Something is wrong with 100 percent blue. I used 90% for that and color to get to 100% saturation and was 58 or something higher than 50 which is default. Everything was close and delta E was good as 50 color and useing cms. All color had even lumance at 75% rec 709. I had a lot of crushing useing color contrast so had to go back to drawing board to keep a almost 900 contrast ratio. I prefer a 1000 contrast one. I learned a lesson of not switching to plus and minus 80 saturation charts instead of plus and minus 20 chart. I could not get bad saturation on a wide range chart. It was that bad saturation off useing color 0.
Now I will make a new ICC and report with just a little adjusts to red saturation at 12, magenta brightness at 8 and blue brightness at 5. Blue was set with eyes and the others with the meter to match lumance at 75% rec 709 in HCFR.
Done with the icc and report. I think blue could be done with eye and upped in saturation instead of brightness. Still looks fine. It is more a downward gamma since I did retouch the white balance after last report.
Please do check the ICC for accuracy.
The gamut stored in the profile is off. With such a highly saturated blue, the matrix that will be applied will desaturate blues a lot, as can be seen by comparing the before and after grangers attached.
However, your ICC profile also includes monitor EDID information which presents a much more believable gamut. In the absence of spectrometer or other appropriate correction, using the EDID gamut as reference could provide you with better results.
I did use the gamut edid before in HCFR and could not make one of the colors match even with hue adjustments. Because blue width shrinks it is desaturated? I see the distortion from crushing colors and more saturated blues ie not pure blue. The gamut matches what I saw in HCFR. It cannot reach 100 percent rec 709. It does in some colors though.
What would you do? Use a srgb profile? Try to get the granger rainbow right? How did you make the granger rainbow with matrix? HCFR can not use the matrix. I cannot make windows not use a profile. I do not use apps that need a profile. Just games and streaming. The tv by itself streaming cannot use a profile. The meter might be off and edid correct so use a profile. Should I use HCFR and try to match edid info? Green will not go Y 0.62 . The blue and red can get there barely. If I do that apps that do not use a profile will be off.
Can I see what the matrix will look like with a free program or website? I got a website that checks wide gamut displays and that looks ok. Its not widegamut though.
This seems to have fix the patch 73 issue. Blue is even visible out of hue in a saturation ramp. It goes from blue pure to purple near whites. I made a rec 709 bt1885 synth profile and tuned hardware to that. Hardware is to the limits though. Meters are reading blue when they should be 0s in the primarys and secondary colors. A spectrometer is needed. A new screen would be nice. lol
Should you make a sythentic profile to the rec 709 coordinates or the measured ones?
I’ve plotted the measurements used to create the ICC profile and also applied a matrix to correct them using EDID as reference.
However, it’s a double correction as your profile measurements were already using RGBLEDFamily_07Feb11.ccss. Not sure if HCFR can apply the matrix on top of the CCSS or it just replaces it (bad results).
1.111913 -0.092048 -0.010026 0.082185 0.919837 0.001502 0.016974 -0.069828 1.037891
If you don’t use any profile aware apps (or more advanced LUT supporting pipelines), you’re kind of stuck using HCFR with the right matrix to try to adjust the gamut from the display’s limited color settings.
