https://github.com/ebu/r167

HLG Display Adaptation Calculator in Python and HTML/Javascript
https://github.com/ebu/r167

Last synced: 5 months ago
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HLG Display Adaptation Calculator in Python and HTML/Javascript

• Host: GitHub
• URL: https://github.com/ebu/r167
• Owner: ebu
• License: apache-2.0
• Created: 2025-04-28T09:51:29.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2025-04-28T09:55:12.000Z (about 1 year ago)
• Last Synced: 2025-04-28T10:51:30.626Z (about 1 year ago)
• Size: 0 Bytes
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# EBU R 167 related HLG Display Adaptation Calculator

This HLG Display Adaptation Calculator implements the Hybrid Log-Gamma (HLG) system as specified in

[ITU-R BT.2100](https://www.itu.int/rec/R-REC-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](https://www.itu.int/pub/R-REP-BT.2390) and [ITU-R BT.2408 Section 2.1](https://www.itu.int/pub/R-REP-BT.2408) 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:

- [EBU Recommendation R 167 — Reference Monitors: Predefined Modes for HLG](https://tech.ebu.ch/publications/r167)

Credits: Thomas Berglund (NRK) for the concept and implementation.