- From: Jacob Rus via GitHub <sysbot+gh@w3.org>
- Date: Sun, 09 Feb 2020 23:49:04 +0000
- To: public-css-archive@w3.org
Here’s what [Poynton’s thesis](http://poynton.ca/PDFs/Poynton-2018-PhD.pdf) says: > The second development is high dynamic range, HDR [Daly 2013]. Conventional HD is approved at a contrast ratio of about 1000:1; diffuse white is portrayed at about 100 nt; and the blackest black is about 0.1 nt. Consumers prefer brighter pictures than those displayed at program creation: Today’s consumer experiences diffuse white at between 300 and 500 nt; black level is typically between 0.3 and 2 nt. For this contrast range, at consumer quality level, eight-bit components coded using a 2.4-power function, as defined in BT.1886, are sufficient. Ten-bit components are used in the studio, and ten bit components would deliver somewhat better performance to consumers than today’s eight bit components. > [...] we expect HDR displays to have gamut approximating that of the DCI P3 standard. Luminance of the portrayal of diffuse white need not be higher than about 500 nt, but we seek to portray specular highlights and directly light sources using luminance levels perhaps ten times higher than diffuse white, a capability unavailable in today’s systems This is now a few years out of date (such displays are just barely starting to now be available), but seems like a reasonable baseline to me. -- GitHub Notification of comment by jrus Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/3435#issuecomment-583909117 using your GitHub account
Received on Sunday, 9 February 2020 23:49:07 UTC