[Cin] Reverse Tone Mapping paper from 2007

[Pekka Paalanen]

On Mon, 12 May 2025 15:52:04 +0300
Andrew Randrianasulu <randrianasulu at gmail.com> wrote:

> And modern reincarnation of this idea, using OBS's plugins!
> 
> https://m.youtube.com/watch?v=qXrn4MqY1Wo
> "DIY "infinity contrast" TV - with 100% recycled parts" from two months
> ago, initially found by my friend Vladimir after I showed him all this.
> 
> added two more recipients in cc.
> 
> Pekka, you might like this too, as less secretive description of how HDR
> part of HDR display system works.

Hi Andrew,

that's a neat project for sure.

> >> PS: I played around with Colorspace property on my hdmi connector on
> >> RX550 via xrandr:
> >>
> >> guest at slax:~/botva/src/src$ DISPLAY=":0" xrandr --output 0x54 --set
> >> Colorspace Default
> >> guest at slax:~/botva/src/src$ DISPLAY=":0" xrandr --output 0x54 --set
> >> Colorspace BT2020_YCC
> >> guest at slax:~/botva/src/src$ DISPLAY=":0" xrandr --output 0x54 --set
> >> Colorspace Default             guest at slax:~/botva/src/src$ DISPLAY=":0"
> >> xrandr --output 0x54 --set Colorspace opRGB               guest at slax:~/botva/src/src$
> >> DISPLAY=":0" xrandr --output 0x54 --set Colorspace Default
> >>
> >> Anything but Default resulted in VERY pink (nearly red!) image. Not sure
> >> if this is limitation of 8bit per channel  mode or hdmi to vga adapter I
> >> use?

Maybe https://gitlab.freedesktop.org/drm/amd/-/issues/3358 ?


Thanks,
pq
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