Originally Posted by jdbimmer
I always appreciate it when you guys post results like this and I realize the effort involved. I do have a few questions and comments (and I hope my calcs are correct..where is Zoyd these days?
1) In terms of deltaE between the i1Pro and the D2, both the HCFR and Calman results average about 1.78 from 20% to 100%. However, the DeltaE between the HCFR and Calman D2 measures is 2.34. I am not sure what to make of that other than that they have different errors. Is the preference towards Calman since it has a smaller red channel error??
From a metrology perspective, ideally HCFR, CF, CalMAN, etc. would provide the same result if the packages were "neutral". In this case, since this was the same meter on the same display within minutes of each other (at most), they should have the same underpinning data (dE = 0 vs. each other). There is obviously a repeatability question, but I've found my own i1 Display to give pretty good repeatability within a short time period.
2) How old is your DTP94? I come up with a 5.3 DeltaE between yours and the i1Pro. I have 1 old and 1 fairly new DTP94, both are around 3.7 compared to my i1Pro.
I haven't checked my DTP-94 recently, so I'm out of this part of the discussion.
3) Although it is irrelevant to this comparison, something seems off on the way your RBG levels display on the graphs at around 10% and 20%. For example, I am calculating your 10% and 20% i1Pro RGB levels at 97/103/73% and 94/102/93% respectively. These don't seem to agree with the results on your graph.
How are you calculating this? (there is a larger point to be made here, but let's deal with some specifics, first)