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Re: PQ HDR in PNG - draft review

From: Lars Borg <borg@adobe.com>
Date: Sat, 20 May 2017 12:20:55 +0000
To: Fredrik Hubinette <hubbe@google.com>
CC: Chris Lilley <chris@w3.org>, "public-colorweb@w3.org" <public-colorweb@w3.org>
Message-ID: <D54556CB.143FE%borg@adobe.com>
Hi Fredrik,

 ICC version 4.x is too difficult to implement efficiently

Interesting observation.
Does this apply to the mandatory parts or only to the optional parts?
Can you elaborate?

AFAIK PQ or HLG cannot be implemented accurately in ICC v2, as there’s no way to handle overrange.
The v4 para tag enables accurate overrange

Lars
Received on Saturday, 20 May 2017 12:21:31 UTC

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