This HLG Display Adaptation Calculator implements the Hybrid Log-Gamma (HLG) system as specified in ITU-R BT.2100, with calculations for System Gamma and HDR Reference White following ITU-R BT.2100 Note 5f, ITU-R BT.2390 Section 6.2 and ITU-R BT.2408 Section 2.1 respectively.
The intention is to help users understand more about how the Hybrid Log-Gamma (HLG) system works.
Two versions are provided:
- Interactive HTML/CSS/JavaScript version to use directly in a browser
- Python version for CLI based interaction
The idea for this tool was inspired by work related to:
Credits: Thomas Berglund (NRK) for the concept and implementation.