Search found 51 matches

by Narkyy
Tue Jul 24, 2018 10:55 am
Forum: CUDA Filters
Topic: HDR -> SDR conversion
Replies: 561
Views: 60857

Re: HDR -> SDR conversion

In the case of HDRTools, YV12 is YUV420P16. I know it's not usually. The source is 4:2:0 so I can't grasp how it looks much better when ending in 4:4:4, looks just like madVR but madVR says 4:2:0 As for the banding, I don't think there's a difference between 8 bit and higher as long as there's dithe...
by Narkyy
Tue Jul 24, 2018 9:36 am
Forum: CUDA Filters
Topic: HDR -> SDR conversion
Replies: 561
Views: 60857

Re: HDR -> SDR conversion

I'm in favor of just having the option to output as YUV420P16 too, it might be affecting the sharpness as well, from tests with HDRTools. Build from latest code change and example script: FFVideoSource("sample5.mkv", colorspace="YUV420P10") ConvertBits(16).ConvertYUVtoXYZ(Color=0,OutputMode=1).Conve...
by Narkyy
Fri Jul 20, 2018 10:08 pm
Forum: CUDA Filters
Topic: HDR -> SDR conversion
Replies: 561
Views: 60857

Re: HDR -> SDR conversion

When I refresh in AvsPmod (so it does all the processing again and outputs the same frame), the image isn't identical as it was before. Which is supposed to be expected? I just tested it again on madVR and it seems indeed to be caused by the setting "restore details in compressed highlights", which ...
by Narkyy
Fri Jul 20, 2018 7:20 pm
Forum: CUDA Filters
Topic: HDR -> SDR conversion
Replies: 561
Views: 60857

Re: HDR -> SDR conversion

You're right, though not everyone likes using SDR as "source" for HDR tonemapped content. Neither look like SDR in terms of colors, in scenes where red is prominent. What's objectively different though, is the level of details retained in those high saturation/hue areas. They seem to get blurred and...
by Narkyy
Fri Jul 20, 2018 4:15 pm
Forum: CUDA Filters
Topic: HDR -> SDR conversion
Replies: 561
Views: 60857

Re: HDR -> SDR conversion

Yes it does blend better, but then the color is not quite right. It's more orange with saturation instead of a dark purplish red like it is already without adjusting saturation. Made this to show more clearly. 1.7 is without saturation adjustment. comparison2.png To me, there's a definite desaturati...
by Narkyy
Thu Jul 19, 2018 6:39 pm
Forum: CUDA Filters
Topic: HDR -> SDR conversion
Replies: 561
Views: 60857

Re: HDR -> SDR conversion

BTW, why do you find the sat adjustment not helpful? It's not that the sat parameter isn't good, it's just not enough to get colors close to v1.4 and madVR even with sat=1.25. Also the issue seems to affect only red, the rest looks just as good. So I'm thinking it's more related to the new Reinhard...
by Narkyy
Thu Jul 19, 2018 4:24 pm
Forum: CUDA Filters
Topic: HDR -> SDR conversion
Replies: 561
Views: 60857

Re: HDR -> SDR conversion

v1.7 and roll doesn't seem to have the desired effect.. The colors don't seem to be changing, it's just getting brighter. Since switching to Reinhard, the contrast has been off as well. Everything looks duller, more grey. Order: v1.4 | v1.7 light=500 roll=0.5 | madVR https://thumbs2.imgbox.com/d7/da...
by Narkyy
Wed Jul 18, 2018 9:56 pm
Forum: CUDA Filters
Topic: HDR -> SDR conversion
Replies: 561
Views: 60857

Re: HDR -> SDR conversion

Looks like that confirms what I noticed, reds aren't as saturated/deep as they should be. Even 1.4 was better I think, though it has a ton of hue shifts. I tried increasing saturation but it didn't get as deep of a red hue. In order: v1.4 light=200 peak=2.0 | v1.6 light=200 tm=0.90 | madVR latest te...
by Narkyy
Wed Jul 18, 2018 12:06 pm
Forum: CUDA Filters
Topic: HDR -> SDR conversion
Replies: 561
Views: 60857

Re: HDR -> SDR conversion

Unfortunately madVR is closed source, though I think madshi had intentions to make plugins from the algorithms like SSIM downscaler, tonemapping. It runs as a rendering engine for media players like MPC-BE, so it does much more than tonemapping but there's nothing for AviSynth so it's a totally diff...
by Narkyy
Wed Jul 18, 2018 11:21 am
Forum: CUDA Filters
Topic: HDR -> SDR conversion
Replies: 561
Views: 60857

Re: HDR -> SDR conversion

:bravo: It looks good for the most parts and the results are pretty good :) Though now I'm mostly picking at small imperfections I can notice against other algorithms. I used the madVR settings people seem to agree on for default, somewhere in this discussion: https://www.avsforum.com/forum/24-digit...