A real hdr image from a Sony hdr video demo (4000 nits peak brightness),I have extract a frame and done the conversion to rec2020 floating point :
Sony 4K HDR Demo - Camping in Nature.mp4.7z (10.8 MB)
the frame
My version (actually it is sigmoid )
hdrframe.pfi (16.1 KB)
RGB per channel tonemapping
Darktable no preserve chrominance
Darktable preserve chrominance
Sigmoid with film-like hue preserve (the same used in rawtherapee)
