fnordware / dciconverter Goto Github PK

The normalization factor for white point (48/52.37) appears to be absent in the plugin. I believe this is leading to result values, notably when Chromatic Adaptation matrix is set to None or D65.

Applying these settings I am getting 4095, 4095, 4095 (12-bit) from a full white source.
Operation: RGB to XYZ
Response Curve: Rec. 709
RGB Color Space: sRGB/Rec. 709
Chromatic Adaptation: None or D65
XYZ Gamma: 2.60

12-bit target white values for D65 white point are 3883, 3960, 4092.

I know you added the option to normalize or not in the DCI plug-in, but with Premiere Pro Jpeg2000 export settings, it is not an option and set exclusively to normalization. Is there a chance you could add a toggle here? Normalization 48/52.37 was created to include D65 without clipping. At 5900K, there would be no clipping at 48/48, hence no clipping with no normalization. My guess is that Adobe chose 5900K because normalization was not necessary at this temperature. That is just a guess on my part.