Re: PNG cICP in the wild (HDR images)

IIRC, the current shipping version of Photoshop supports this as does Lightroom and Adobe Camera Raw.  It also supports consuming it.   This work was done by @Eric Chan<mailto:erichan@adobe.com>, who you saw that at meeting, Chris.

On a slightly related note – if anyone has not heard, and is still interested, the PDF Association is putting on a symposium tomorrow (Tuesday) on the future of the PDF Imaging Model , and one part of that is HDR.  (so that your HDR-enabled PNGs can be correctly captured and represented!).   See https://pdfa.org/event/symposium-on-advancing-the-pdf-imaging-model/

Leonard

From: Chris Lilley <chris@w3.org>
Date: Friday, October 13, 2023 at 3:20 PM
To: public-png@w3.org <public-png@w3.org>
Subject: PNG cICP in the wild (HDR images)
EXTERNAL: Use caution when clicking on links or opening attachments.


I spent some of today in a hybrid meeting (Apple Cupertino and remote)
of the HDR working group of the ICC.

There were demos there of HDR images (with gainmaps) and they were PNG
images with cICP chunks. So some build of Adobe Photoshop is generating
these. The SDR version was in Display P3 and the HDR version in BT.2100.

--
Chris Lilley
@svgeesus
Technical Director @ W3C
W3C Strategy Team, Core Web Design
W3C Architecture & Technology Team, Core Web & Media