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23rd January 2014, 04:00 | #21565 | Link |
MPC-HC Developer
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So to make it clear. You want me to search the thread for you because you're too lazy, or what? Just search for "Catmull-Rom" and you will get all related posts. CR with AR and Linear Light enabled produce the most accurate and natural looking picture. I tested it a lot myself and I like CR best. Here is comparison to Lanczos done by @6233638 http://forum.doom9.org/showpost.php?p=1606829&postcount=16482
And remember that there is no best option, some people like sharp image with aliasing, some like softer image but without artifacts. You need to compare results yourself, it's not that hard. Last edited by kasper93; 23rd January 2014 at 04:03. |
23rd January 2014, 04:01 | #21566 | Link |
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speaking of upscaling by powers of 2..
Has anyone cared about upscaling 1080p video(or film) to UHD (2160p) and downscaling back to monitor resolution (1080p)?
Visual difference I found were CGs (pixelated fonts etc) blending in with rest of the picture although seeming a bit blurry (probably due to outlines being blended with adjacent pixels). More importantly, digital noises seemed less intrusive to my eyes. |
23rd January 2014, 04:01 | #21567 | Link | |
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Quote:
So to do general rescaling with it, you need to combine it with a conventional resampler that will change the resolution to desired values. For example, if you have 640x360 source, nnedi3 can only give you these sizes: 640x720, 1280x360, 1280x720, 2560x720, 1280x1440, 2560x1440 ... Also since nnedi3 is a (complex) interpolator, not a scaler, it can lead to various sorts of artifacts, since basically, the filter is "guessing" what is in the extra pixels. It can make mistakes, like blurring/connecting adjacent sharp lines for example. Last edited by mandarinka; 23rd January 2014 at 04:04. |
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23rd January 2014, 07:28 | #21568 | Link | |
Kid for Today
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so if I wanna upscale a 4:3 360*288 video to 1080p, I want it to be 1440*1080 in the end so ideally I would like to go 4X360 + 2X288? Apparently mVR will only do 2X
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23rd January 2014, 09:47 | #21570 | Link | ||
ангел смерти
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Location: Lost
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Quote:
With any luck XySubFilter will eventually do anti-aliasing for VobSub and PGS, so there's no need to do it on the full screen. I feel your pain! Quote:
(If you have a cartoony palette with lots of aliasing though, hq4x or double nnedi might be useful. But rarely for natural video.) |
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23rd January 2014, 10:02 | #21573 | Link |
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For video mode deinterlacing madVR will continue to rely on DXVA for the near future. At some point (not soon) I'm going to look into the whole deinterlacing topic again. But for now no changes in that area. FWIW, motion adaptive video mode deinterlacing (= weaving for static image areas) and something like nnedi3 are not mutually exclusive.
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23rd January 2014, 15:13 | #21576 | Link |
German doom9/Gleitz SuMo
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Before asking questions about "sharpness" again, understand what it means.
I am not a big fan of the Gibbs phenomenon caused by bicubic, Lanczos, or similar "sharp" interpolations. |
23rd January 2014, 15:26 | #21578 | Link |
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Again? Isn't it the reason why this thread exists?
Yes, I have read about ringing artifacts and Gibbs phenomenon (I also see them). I merely want to know from first hand experience how does it look watching 1080p content on a 1440p monitor, and how well MadVR's upscalers doing their job.
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System: i7 3770K, GTX660, Win7 64bit, Panasonic ST60, Dell U2410. Last edited by James Freeman; 23rd January 2014 at 15:38. |
23rd January 2014, 15:47 | #21579 | Link |
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"How does it look" compared to what? Your real question is probably this:
Is it better to watch 1080p content on a 30" 1080p display? Or is it better to watch 1080p content on a 30" 1440p display, using madVR upscaling? If this is your question, then I can't answer it because I have no way to test that. The only way you could fairly test this is if you had two 30" display, one with 1080p physical resolution and one with 1440p physical resolution, so you could play the same movie on both and compare directly. Without such a direct comparison, I find it hard to say whether upscaling is beneficial or not. That said, it depends on the upscaling factor. The bigger the scaling factor, the higher the chances upscaling can be beneficial. With scaling factors south of 1.2x I would guess that upscaling is not beneficial, maybe even harmful. However, if you approach a 2.0x factor, upscaling is going to look *a lot* better. So playing back 1080p content on a 4K display should look noticeably better than playing back 1080p content on a 1080p display of the same size. But this is only true if you sit close enough to see the difference. If you sit far enough away, the difference will vanish into thin air... |
Tags |
direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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