[FFmpeg-devel] SDR->HDR tone mapping algorithm?
harish.krupo.kps at intel.com
Fri Feb 8 10:17:07 EET 2019
We are in the process of implementing HDR rendering support in the
Weston display compositor  (HDR discussion here ). When HDR
and SDR surfaces like a video buffer and a subtitle buffer are presented
together, the composition would take place as follows:
- If the display does not support HDR metadata:
in-coming HDR surfaces would be tone mapped using opengl to SDR and
blended with the other SDR surfaces. We are currently using the Hable
operator for tone mapping.
- If the display supports setting HDR metadata:
SDR surfaces would be tone mapped to HDR and blended with HDR surfaces.
The literature available for SDR->HDR tone mapping varies from simple
linear expansion of luminance to CNN based approaches. We wanted to know
your recommendations for an acceptable algorithm for SDR->HDR tone mapping.
Any help is greatly appreciated!
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