János, Tóth F. wrote:
This produces an exact Inverse Rec709 Encode curve on the display. But it's still looks bad.
Generally using the inverse of the encoding curve looks bad, because the viewing conditions are different. Typically the encoding assumes a very bright studio viewing situation, while the actual display viewing conditions are dim to dark. The discrepancy between the viewing gamma encoding and a typical display gamma characteristic traditionally makes this viewing conditions adjustment (see "Digital Video and HDTV" by Charles Poynton for more explanation of this.)
So, the question remains: What parameters should I use for the Dim and Dark presets to match with the scaling of ArgyllCMS/dispcal?
Since you haven't explained exactly what you want to match, it dificult to say. dispcal has a range of ways of dealing with the non perfect black of the device, and this can have a noticable subjective effect. Graeme Gill.