Some facts:

1. None of the techniques being discussed uses "guesswork"

2. Each technique measures a set of test patterns and calculates the mathematically exact change needed to correct the RGB input for that pattern and produce the desired Rec709 color.

3. Each technique will take the results of 2. and will use 3 dimensional interpolation algorithms to translate from the measured volume to the 65^3 hardware LUT.

It's not rocket science and nobody has any "special sauces" to generate more accurate results. If you do the math right and fill the volume with test patches appropriate to the degree and complexity of the non-linear space they will all give you the same result.

edit: Point number 2 assumes that the desired response of the system is one that is properly calibrated to a standard. There are many things not related to reproducing the standard source space that can be accomplished in the color transformations including both possibly beneficial ones (compensation for source/target viewing environments) and undesirable ones (visual "enhancements"). For the purposes of assessing accuracy, the exact reproduction of the source space is the only objective goal that may be considered and only the metrics of color science are allowable in making such an assessment.

Edited by zoyd - 4/2/13 at 7:39am

1. None of the techniques being discussed uses "guesswork"

2. Each technique measures a set of test patterns and calculates the mathematically exact change needed to correct the RGB input for that pattern and produce the desired Rec709 color.

3. Each technique will take the results of 2. and will use 3 dimensional interpolation algorithms to translate from the measured volume to the 65^3 hardware LUT.

It's not rocket science and nobody has any "special sauces" to generate more accurate results. If you do the math right and fill the volume with test patches appropriate to the degree and complexity of the non-linear space they will all give you the same result.

edit: Point number 2 assumes that the desired response of the system is one that is properly calibrated to a standard. There are many things not related to reproducing the standard source space that can be accomplished in the color transformations including both possibly beneficial ones (compensation for source/target viewing environments) and undesirable ones (visual "enhancements"). For the purposes of assessing accuracy, the exact reproduction of the source space is the only objective goal that may be considered and only the metrics of color science are allowable in making such an assessment.

Edited by zoyd - 4/2/13 at 7:39am