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22nd July 2015, 23:17 | #32061 | Link |
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Thanks for that sample, leeperry.
I'm seeing too much aliasing with SuperRes at the balcony railing, even with strength 1 and radius 1.0. Even NNEDI3 64 doesn't look exactly great here, 256 neurons really improve the image a lot. However, 64 neurons are much more reasonable and still look better than super-xbr (e.g. regarding the antennas). AS 0.2 UR still makes the image a little sharper without really destroying anything with NNEDI3 64. That's exactly what I meant with "set & forget". I scaled it to 1080p and compared it with the original, madshi. |
23rd July 2015, 04:34 | #32062 | Link |
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Im wondering in how far it makes sense to compare different upscaling/downscaling algorythms when the comparison pic has been downscaled/upscaled before. couldnt there be potential interference from the downscaling/upscaling process which has been done before the upscaling/downscaling process? perhaps the outcome would be different in some cases if the first step wasnt done?
so doesnt it make more sense to look at a picture which has only either been upscaled or downscaled and not both?
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23rd July 2015, 08:53 | #32066 | Link | ||
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Quote:
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http://screenshotcomparison.com/comparison/136044 |
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23rd July 2015, 09:02 | #32067 | Link | |
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madVR used to have its own copy-back function, but it was removed because LAV is just more efficient at it. It seems to mostly affect NVIDIA, which is the good news, since copy-back is very efficient on nvidia anyway.
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LAV Filters - open source ffmpeg based media splitter and decoders |
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23rd July 2015, 09:25 | #32068 | Link | |
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23rd July 2015, 09:42 | #32069 | Link |
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Before evaluating the quality, you should also make sure that all trade quality options are off that interact with DXVA in any way. I don't think its usually *that* bad, but maybe I remembered wrong.
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LAV Filters - open source ffmpeg based media splitter and decoders |
23rd July 2015, 10:06 | #32071 | Link | |
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Those test was done using DXVA native and copyback. What about CUVID? (I've been still using it for a long time.)
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23rd July 2015, 13:56 | #32074 | Link |
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why, in how far is judging this different than judging it from an image which has been up- and downscaled? how can you only be sure the result you see is from the algorythm you want to look at and has not been influenced by the other one?
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23rd July 2015, 14:21 | #32075 | Link | ||
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Quote:
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Oh BTW I had a gamut mapping PS script engaged in PotP so yeah the ground truth is the one I labelled as is and not the untouched capture. Last edited by leeperry; 24th July 2015 at 00:36. |
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23rd July 2015, 14:49 | #32076 | Link | |
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Btw: Is it technically possible to just sharpen chroma to fight blur of CSS? |
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23rd July 2015, 14:53 | #32077 | Link |
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I've had success loading images in MPC-HC, though it's not ideal for saving the result since I think madVR uses slightly different logic for that. I'm pretty sure the upscaling works just fine though.
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Test patterns: Grayscale yuv444p16le perceptually spaced gradient v2.1 (8-bit version), Multicolor yuv444p16le perceptually spaced gradient v2.1 (8-bit version) |
23rd July 2015, 16:48 | #32078 | Link | |
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23rd July 2015, 17:54 | #32079 | Link |
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It should be in no way inferior. You probably even save energy with mpeg4-asp when NOT using Cuvid and instead software.
nevcairiel has no control over Cuvid since it's a blackbox, the DXVA2cb implementation is by himself. |
23rd July 2015, 18:07 | #32080 | Link |
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I'm not sure what you're trying to get at here. The nature of scaling involves throwing away details when downscaling and preserving what details still exist when upscaling. Unless you had an analog source captured at two different optical zoom levels, this is the best we can do. Most digital sources we receive are going to be upscaled or downscaled using algorithms.
Last edited by Akeno; 23rd July 2015 at 18:10. |
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direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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