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20th October 2024, 10:38 | #3021 | Link |
Acid fr0g
Join Date: May 2002
Location: Italy
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Someone knows how to extract the noise frequencies from an image and selectively remove them?
I think it would be really useful and fast with postproduction digital noise, if simple enough.
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20th October 2024, 23:14 | #3022 | Link |
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There were some FFTW-based plugins like DeFreq (?). But it works about good only if you distortion is narrow bandwidth enough (like colour subcarrier). Natural noise is much more complex mixed with useful data and can not be as simply separated. When you run SMDegrain and it blends different frames blocks - it may be equal to special temporal-convolution frequency filter to pass only narrow frequencies and suppress out of band noise. May be same or close idea is implemented in FFT3D plugin via FFT.
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21st October 2024, 10:55 | #3023 | Link | |
Acid fr0g
Join Date: May 2002
Location: Italy
Posts: 2,809
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Quote:
That anime was 3D rendered and digital noise added later, to simulate film effect. The bandwidth, as far as my eyes can see, is really limited and mostly visible in darker area, even if light ones are mildly affected too.
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21st October 2024, 13:30 | #3024 | Link |
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Typical examples for narrow band distortions are Aerial interference with analog broadcast or some analog interference at ADC board/device to convert analog to digital. If random special noise is added - it most probable have too wide (flat) spectrum and can not be easily filtered out with narrow band-stop filters.
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24th October 2024, 16:33 | #3025 | Link | |
Acid fr0g
Join Date: May 2002
Location: Italy
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Quote:
Do you know of some model that can keep 1x scale and deblur/antialiasing, to have some anime restoration instead of scaling?
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@turment on Telegram Last edited by tormento; 24th October 2024 at 17:55. |
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29th October 2024, 12:23 | #3026 | Link |
Acid fr0g
Join Date: May 2002
Location: Italy
Posts: 2,809
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Tried to use Oyster_super.
I have to Crop(128,128,-128,-128) and resize because the image become enlarged and corrupted along the sides and doubles. Plus, the comment says ## Input: 444 YUV/RGB at any bitdepth (output is float) but it needs to be 32 bits. Anyone else?
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21st November 2024, 16:05 | #3029 | Link |
Acid fr0g
Join Date: May 2002
Location: Italy
Posts: 2,809
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The call from xClean:
ConvertFormat(cconv, fmt_out="444", kernel_c=chroma, tv_in=!fulls, cplace_in=cplace) causes Script error: NNEDI3RESIZE does not have a named argument "src_width" (D:/Programmi/Media/AviSynth+/plugins64/TransformsPackMain-2.2.1~Dogway.avsi, line 969) (D:/Programmi/Media/AviSynth+/plugins64/TransformsPackMain-2.2.1~Dogway.avsi, line 971) (D:/Programmi/Media/AviSynth+/plugins64/TransformsPackMain-2.2.1~Dogway.avsi, line 972) (D:/Programmi/Media/AviSynth+/plugins64/TransformsPackMain-2.2.1~Dogway.avsi, line 973) (D:/Programmi/Media/AviSynth+/plugins64/TransformsPackMain-2.2.1~Dogway.avsi, line 973) (D:/Programmi/Media/AviSynth+/plugins64/TransformsPackMain-2.2.1~Dogway.avsi, line 1323) (D:/Programmi/Media/AviSynth+/plugins64/xClean-beta10~mysteryx93.avsi, line 232) and I can't sort out the bug in the TransformsPackMain-2.2.1. Any idea?
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