Rethinking highlights from an ordinary JPEG
Pure HDR
Local Intel macOS experiment · Work in progress
An experiment in generating Gain Map HDR for an ordinary JPEG while preserving its SDR rendering and separating format compatibility from visual judgement.
First make HDR visible to the device; only then ask whether it looks natural.
- Supports single or batch JPEGs, strength control, failure isolation and output validation.
- The SDR image keeps its composition and grade while the Gain Map extends displayable highlight relationships.
- Explores the HDR viewing experience in Apple Photos and Xiaohongshu.