Frequently Asked QuestionscineShakeEqualEyes

cineSpace Documentation

EqualEyes

When calibrating a monitor using the default target LUT I find I am left very little head room in Red gain, it is at about 98. When I used older versions of the profiler the overall RGBÊgain is required to be lower, leaving red at 90. I did not alter the brightness when using v2.0 but I did notice that the screen seemed a lot darker.

This should not happen in current builds of equalEyes, as scaling is now turned on by default.

To explain what is happening here:

By default EqualEyes matches the users monitor to the target Monitor in both chromaticity and luminance.

If you have the scale button pressed it will match chromaticity but will scale the luminance to that of the monitor (this is the normal behaviour of cineSpace v1.x).

We have done this for three main reasons;

  1. It enables for much more accurate matching between monitors. Using cineSpace v1.x you could profile two machines next to each other and when they both used the same target profile afterward they may still have very different luminances, and hence appearance. So by matching luminance we get a much better match.
  2. The HD, sRGB and similar standards have ideal luminances and viewing conditions. We can only match these correctly by matching luminance and chromaticity.
  3. It enables the users to accurately compare the luminance differences between different targets. Particularly useful for comparing film profiles of different film stock / lab setup combinations.

The main implication of matching to the target luminance is that if it is greater than the monitor trying to match it can achieve, clipping occurs making the white point completely inaccurate. This is what is occurring if the scale light in equalEyes is red.

To help avoid this situation we added the ability for cineProfiler to optimise monitors for luminance as well as black/white point chromaticity.

The problem is if you optimise the monitor to be exactly the same as the target you become completely incapable of viewing targets who have either a brighter luminance or different white point chromaticity, as either of these will cause clipping and so will need to be scaled.

To avoid this we have our default profile with 6100 wp (between film and HD) and we have added some headroom in cineProfiler so that the target you aim for when optimising is actually a little higher than the target profile it's self.

This is why all of a sudden you need to push your monitors higher we have been experimenting with the amount of headroom needed. It is hoped that these problems will be less of an issue in the next release (v2.1) where better control over the desired luminance will be available in cineProfiler.

Frequently Asked QuestionscineShakeEqualEyes

The cineSpace suite is developed by Rising Sun Research.
Also available are the cineSpace Forums.
This documentation last changed on October 19, 2004.