About Calibrating HDR-projectors on Calman

[YOUNGJUN WOO]

I have quetions on Calman when in HDR-Projectors.

First, the thing is about Offset setting 2084gamma for HDR-projectors on Calman. How can I judge what number is the best? I mean the ideal offset is the time when the EOTF will be onto Yellow-EOTF, and then adjusting Contrast. In this case, there might be different results depending on the Offset. Is it right?

Second, when in CMS, according to 50% targets of colours, I can do it as possible as the projector can be adjusted, but the reall projection was washed out without detail. So, I checked 80~100% saturation in bt2020. The things’ brightness wewre too high. It might be affecting on crushed-details. In this case, how can I adjust CMS?

Topic

[YOUNGJUN WOO]

Do you mean that I have to consider the maximum luminance firstly in calibration before adjusting anything? To adjust EOTF, I have to consider White level and Contrast Enhance like these functions?

[YOUNGJUN WOO]

1.
According to the Calculation way to approach 1000nits, then the measured EOTF is usually likely to be over the Calman EOTF grapgh? Is this normal?

2.
Please explain the below that you said.

” IF PEAK LUMINANCE IS AROUND 1000 NITS, then 50-65% will be at 400- 500 ? NITS (guessing ). ”

[Author]

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