вс, 11 мая 2025 г., 23:21 Andrew Randrianasulu <randrianas...@gmail.com>:
> > > вс, 11 мая 2025 г., 22:53 Andrew Randrianasulu <randrianas...@gmail.com>: > >> >> >> вс, 11 мая 2025 г., 21:49 Andrew Randrianasulu <randrianas...@gmail.com>: >> >>> >>> >>> вс, 11 мая 2025 г., 21:23 Andrew Randrianasulu <randrianas...@gmail.com >>> >: >>> >>>> Today you can find more refined ideas, papers and implementations, but >>>> it all started somewhere ... >>>> >>>> https://vccimaging.org/Publications/Rempel2007L2H/Rempel2007L2H.pdf >>>> >>> >> Ah, wiki article on one of the first HDR displays from 2005: >> >> https://en.m.wikipedia.org/wiki/DR37-P >> >> and it links to Wayback Machine-saved article explaining this monitor: >> >> >> https://web.archive.org/web/20070122160003/http://www.bit-tech.net/hardware/2005/10/03/brightside_hdr_edr/1.html >> >> wow, $50 000 watercooled (!) 37" display! >> >> It used same technology of many specific illumination "zones" as many >> today's HDR monitors (no wonder, this BrightSide firm said they patented it >> and sold to various display manufacturers.) >> >> Still, it was connected via DVI , not sure at that bit depth and >> colorspace ... >> > > And looking at their (BrightSide's) archived webpage ( Dolby bought them) > I see such gems as > > > https://web.archive.org/web/20060721021656/http://www.brightsidetech.com/tech/papers/siggraph2004.pdf > > Basically DIY HDR display from LCD + Projector, driven by dual vga outputs > of ordinary for that era PC graphics cards ;) > > And modern reincarnation of this idea, using OBS's plugins! https://m.youtube.com/watch?v=qXrn4MqY1Wo "DIY "infinity contrast" TV - with 100% recycled parts" from two months ago, initially found by my friend Vladimir after I showed him all this. added two more recipients in cc. Pekka, you might like this too, as less secretive description of how HDR part of HDR display system works. > > > > >> PS: I played around with Colorspace property on my hdmi connector on >> RX550 via xrandr: >> >> guest@slax:~/botva/src/src$ 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. >> >> >> >> >>> >>> more recent 2020 paper >>> >>> >>> https://www.cambridge.org/core/services/aop-cambridge-core/content/view/3E58E1A14BC6543EB47B6C3B1A172C96/S2048770320000050a.pdf/fully-automatic-inverse-tone-mapping-algorithm-based-on-dynamic-mid-level-tone-mapping.pdf >>> >>> >>>
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