вс, 11 мая 2025 г., 23:21 Andrew Randrianasulu <randrianasulu@gmail.com>:


вс, 11 мая 2025 г., 22:53 Andrew Randrianasulu <randrianasulu@gmail.com>:


вс, 11 мая 2025 г., 21:49 Andrew Randrianasulu <randrianasulu@gmail.com>:


вс, 11 мая 2025 г., 21:23 Andrew Randrianasulu <randrianasulu@gmail.com>:
Today you can find more refined ideas, papers and implementations, but it all started somewhere ...


Ah, wiki article on one of the first HDR displays from 2005:


and it links to Wayback Machine-saved article explaining this monitor:


wow, $50 000 watercooled (!) 37" display!

It used same technology of many specific illumination "zones" as many today's HDR monitors (no wonder, this BrightSide firm said they patented it and sold to various display manufacturers.)

Still, it was connected via DVI , not sure at that bit depth and colorspace ...

And looking at their (BrightSide's) archived webpage ( Dolby  bought them) I see such gems as


Basically DIY HDR display from LCD + Projector, driven by dual vga outputs of ordinary for that era PC graphics cards ;)


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.







PS: I played around with Colorspace property on my hdmi connector on RX550 via xrandr:

guest@slax:~/botva/src/src$ DISPLAY=":0" xrandr --output 0x54 --set Colorspace Default
guest@slax:~/botva/src/src$ DISPLAY=":0" xrandr --output 0x54 --set Colorspace BT2020_YCC
guest@slax:~/botva/src/src$ DISPLAY=":0" xrandr --output 0x54 --set Colorspace Default             guest@slax:~/botva/src/src$ DISPLAY=":0" xrandr --output 0x54 --set Colorspace opRGB               guest@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?

opRGB = Adobe RGB as far as I can see in Wiki.