I’ve further improved the color matching algorithm, such that any artifacts in the resulting image are further reduced. Here is a regrade, based on this upgraded algorithm.
Bluray:
Screener:
Bluray matched to screener:
Bluray matched to screener with corrected black levels:
http://screenshotcomparison.com/comparison/180141
The comparison shows, that the regrade has significantly more shadow detail, when compared to the bluray, even with the corrected black levels.