Images in high dynamic range (HDR) format, e.g., with high bit-depth and color resolution, cannot be processed or rendered without appropriate hardware that is capable of displaying the image. This disclosure describes a high bit-depth, high dynamic range image format that is backward compatible with standard dynamic range (SDR) equipment. A single file includes a highly compatible, SDR-formatted version of an image that acts as a primary image and additionally, a high bit-depth, HDR-formatted version of the same image. Metadata that specifies an offset indicative of the location of the HDR image is included within the file. A conventional image reader can, without modification, access the conventional SDR image from the file, while image readers capable of reading the HDR format can access and use the embedded HDR image.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Chusid, Nicholas and Alhassen, Fares, "Backward Compatible HDR Image Format", Technical Disclosure Commons, (November 15, 2021)