Originally Posted by zoyd
Yes, set the pattern generator intensity to 75% in the normal Rec709 colorspace to do that. Again, if you want to run saturations after that you'll need to switch back to 100% intensity.
OK, thanks. Think I understand, but in the interest of certainty, just wanted to be surevI have it right:
1/ for whitepoint and 11-pt greyscale calibration, set pattern generator intensity to 100% because you will be sweeping anyway (and standard for primaries is inconsequential).
2a/ for calibrating primaries & secondaries at 75% / 75%, set the standard to Rec.709 (75% /75%) and set pattern generator to 75%.
2b/ for calibrating at 100% / 100%, standard is set to Rec.709 and generator is set to 100%.
2c/ to calibrate fully saturated primaries /secondaries at 75% luminance, set standard to Rec.709 and set generator to 75%.
2d/ if you ever wanted to calibrate 75% saturated primaries and secondaries at 100% luminance, I suppose you could set reference to Rec.709 (75%/75%) and generator to 100%, butbI am unsure if that would work (or if it makes sense).
3/ before running any saturation sweeps including color checker, standard needs to be set to Rec.709, generator needs to be set to 100%, and measure primaries & secondaries needs to be re-run.
Did I get all of that right?
And by the way, while drilling down into all of these technical details, I just want voice my appreciation for all the excellent work that you and whoever else has contributed to HCFR have done - the more I dive into that application's capability, the more impressed I become