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+---- Thread: HDR>SDR Tonemapping in Kodi only affects brightness, not color saturation? (/showthread.php?tid=359373)
HDR>SDR Tonemapping in Kodi only affects brightness, not color saturation? - jubilex - 2020-12-26
Plex seems to do a good job of tonemapping, and I assume it is doing it through software because it doesn't seem to matter what GPU is used. It can be a little bright compared to the SDR version of the same movie, but color seems to mostly match, and the brightness could be intentionally boosted in the HDR master.
Kodi on the other hand does not compensate for the color differences between HDR and SDR. Enabling Reinhard and tweaking the tonemapping parameter can get the brightness more or less in the ballpark, although contrast suffers with it looking much more flat than the Plex tonemapping, but the colors are extremely desaturated. Would it be possible to fix this or add a saturation slider? Maybe with that and the existing brightness/contrast sliders, a decent result could be achieved manually, although obviously it would be preferable to get it right internally.
Here are screenshots demonstrating:
Native SDR version:
HDR version tonemapped in Plex on windows:
HDR version tonemapped with parameter .8 in Kodi
HDR version tonemapped with parameter .7 in Kodi
RE: HDR>SDR Tonemapping in Kodi only affects brightness, not color saturation? - jjd-uk - 2020-12-26
You don't mention what version you are using? As v19 Matrix Beta has more tone map algorithms included.
RE: HDR>SDR Tonemapping in Kodi only affects brightness, not color saturation? - jubilex - 2020-12-26
Flipping between the pics in different tabs, it seems with Kodi it is as much or more of a gamma issue than contrast or possibly saturation. It's just so washed out and flat.
RE: HDR>SDR Tonemapping in Kodi only affects brightness, not color saturation? - jubilex - 2020-12-26
(2020-12-26, 20:19)jjd-uk Wrote: You don't mention what version you are using? As v19 Matrix Beta has more tone map algorithms included.
I'm still using 18 until PlexKodiConnect is updated to work with 19. What has been the response to the new HDR>SDR in 19?
Edit: Just installed Matrix beta on Windows and yes, the new algorithms work great. Now I just have to hope PlexKodiConnect and Cinemavision are ported over. Unless there's a chance these algorithms could be added to 18 somehow?