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Re: [csswg-drafts] [css-color-hdr-1] Compositing SDR in HDR outputs (#5323)

From: simontWork via GitHub <sysbot+gh@w3.org>
Date: Fri, 11 Sep 2020 10:32:39 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-691017078-1599820358-sysbot+gh@w3.org>
If you're mapping an SDR image to cover the whole screen, then yes I agree.

The issue appears when the SDR image is mapped to be part of an HDR image (e.g. as picture-in-picture on a video stream) or alongside an HDR image.  The presence of specular highlights will affect the shadows and mid-tones perception of the scaled SDR image - the peak brightness will look correct.

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