With iOS 18, Apple launched “Adaptive HDR.” This is a system of embedding an HDR representation of an image within an SDR image, allowing HDR support among legacy formats such as JPEG. While Adaptive HDR is Apple’s branding, this technology has existed for several years under Adobe’s Gain Map Initia…

Hi @sandofsky , Welcome to the Ghost community! Thank you for bringing this to our attention. I asked our engineers and understood that the base library we use for image manipulation and optimisation ( Sharp ) doesn’t (yet) support this. Sharp, in turn, uses Libvips underneath, which also doesn’t see…

[mod note: merged from a different thread after re-opening this topic] With Safari 26, HDR support will be ubiquitous among major browsers. Since the previous ticket, libvips appears to have merged in support. This was listed as a blocker in the previous ticket. Add libultrahdr by jcupitt · Pull R…

The related Sharp issue is Please add support for HDR JPG gain maps · Issue #4314 · lovell/sharp · GitHub Once Sharp updates and releases support, @tryghost/image-transform will need to be updated (Renovate automatically does this, but someone can also manually do it) and released (manually done). …

Ghost Forum

Ghost Strips HDR Gain Map

Ideas

Topic		Replies	Views
Uploaded Images colour profile stripped Installation	4	927	December 14, 2018
HEIC image support Ideas	3	246	October 30, 2024
Image metadata stripping for privacy Using Ghost	1	518	October 2, 2022
Using IPTC data for caption? Ideas	3	526	February 12, 2022
Support for AVIF image format Ideas	13	1375	March 2, 2026

Ghost Strips HDR Gain Map

Related topics