Re: Principles of HDR in chrome

I think the idea is too new for there to be a study. :)

The evidence is only anecdotal at this point:
 1)  Watching HDR content in an office environment (or outside) leads to a
lot of squinting.
 2)  Separating compositing and environment adaptation seems to lead to a
simpler and more consistent model.

     /Hubbe


On Mon, Nov 20, 2017 at 11:05 AM, Lars Borg <borg@adobe.com> wrote:

> >SDR should be mapped into HDR as when played in a reference environment,
> the composited result should then be adapted to the viewing environment.
> (Which in a bright environment means that both HDR and SDR are made
> brighter.)
> >If this conclusion is completely incorrect, then I should just scrap the
> document instead of working on fixing the inaccuracies.
>
> Fredrik,
>
> Maybe I missed it, but I have not seen any study that confirms this
> approach.
>
> SDR devices have unpredictable shadow rendering due to a wide range of
> black levels across devices. Some colorists intentionally lift blacks to
> avoid loss of shadow details.
>
> HDR devices are expected to provide dark blacks, and often render SDR
> blacks darker than intended.
>
> So a trivial mapping of SDR to HDR might not preserve the creative intent
> for SDR.
>
> Is there a study on this?
>
> Thanks,
>
> *Lars Borg*  |  Principal Scientist  |  Adobe  |  p. 408.536.2723
> <(408)%20536-2723>  |  c. 408.391.9479 <(408)%20391-9479>  |  borg@adobe.
> com
>
>