ChickenDream: realistic film grain generator

cretindesalpes · 11th April 2022, 17:46

I wrote a plug-in for realistic film-grain rendering:

>>> chickendream-r2.zip <<<

Original | mild grain | excessively huge grain

The plug-in supports Vapoursynth and Avisynth+.

Beware, the processing is extremely slow, a few seconds for a single FHD frame (with multi-threading). Note: ChickenDream supports AVSTP threading.

There is also a Git repository.

kedautinh12 · 12th April 2022, 00:21

avstp still error with mvtool2, i think need update for fix it

anton_foy · 12th April 2022, 21:52

Quote:

Originally Posted by cretindesalpes

I wrote a plug-in for realistic film-grain rendering:

>>> chickendream-r1.zip <<<

Original | mild grain | excessively huge grain

The plug-in supports Vapoursynth and Avisynth+.

Beware, the processing is extremely slow, a few seconds for a single FHD frame (with multi-threading). Note: ChickenDream supports AVSTP threading.

There is also a Git repository.

Awesome! Just curious what kind of references did you use for this? Why is it so slow, because of the distribution of grain over the different frequencies? I know this is a difficult task thats why im so interested. Greatly appreciated!

DTL · 12th April 2022, 22:14

Natural photon shot noise have Gaussian distribution (at medium and high levels). Do it have Gaussian distribution or other ? We need some source of Gauss distributed noise generator to test denoise processing with closeer to natural noise (I think AddNoise() plugin do not have Gauss distribution ?).

cretindesalpes · 13th April 2022, 00:11

anton_foy:

It is slow because it is more or less a downscaler having to filter potentially hundreds or thousands grains per pixel.

This is an optimised implementation of the model and algorithm described in the following papers:

Alasdair Newson, Julie Delon, Bruno Galerne, A Stochastic Film Grain Model for Resolution-Independent Rendering, Computer Graphics Forum, Wiley, 2017
Alasdair Newson, Noura Faraj, Julie Delon, Bruno Galerne, Realistic Film Grain Rendering, Image Processing On Line 7, 2017, pp. 165–183

DTL:

AddGrainC uses a gaussian distribution. But the ChickenDream model works differently. Check the papers for more details.

cretindesalpes · 2nd June 2022, 13:50

ChickenDream r2:

Allowed larger grain radius when using large standard deviation values.
Added a draft parameter.
Changed the configure options to compile with Clang.
Fixed a crash when the picture width is not a multiple of 8 (thanks to MonoS for the report).

ognirats · 1st March 2023, 22:19

https://forum.videohelp.com/threads/...n-generator%29

help. linked videohelp thread

11th April 2022, 17:46	#1 \| Link
cretindesalpes ͡҉҉ ̵̡̢̛̗̘̙̜̝̞̟̠͇̊̋̌̍̎̏̿̿ Join Date: Feb 2009 Location: No support in PM Posts: 712	ChickenDream: realistic film grain generator I wrote a plug-in for realistic film-grain rendering: >>> chickendream-r2.zip <<< Original \| mild grain \| excessively huge grain The plug-in supports Vapoursynth and Avisynth+. Beware, the processing is extremely slow, a few seconds for a single FHD frame (with multi-threading). Note: ChickenDream supports AVSTP threading. There is also a Git repository. __________________ dither 1.28.1 for AviSynth \| avstp 1.0.4 for AviSynth development \| fmtconv r30 for Vapoursynth & Avs+ \| trimx264opt segmented encoding Last edited by cretindesalpes; 2nd June 2022 at 13:46. Reason: r2

13th April 2022, 00:11	#5 \| Link
cretindesalpes ͡҉҉ ̵̡̢̛̗̘̙̜̝̞̟̠͇̊̋̌̍̎̏̿̿ Join Date: Feb 2009 Location: No support in PM Posts: 712	anton_foy: It is slow because it is more or less a downscaler having to filter potentially hundreds or thousands grains per pixel. This is an optimised implementation of the model and algorithm described in the following papers: Alasdair Newson, Julie Delon, Bruno Galerne, A Stochastic Film Grain Model for Resolution-Independent Rendering, Computer Graphics Forum, Wiley, 2017 Alasdair Newson, Noura Faraj, Julie Delon, Bruno Galerne, Realistic Film Grain Rendering, Image Processing On Line 7, 2017, pp. 165–183 DTL: AddGrainC uses a gaussian distribution. But the ChickenDream model works differently. Check the papers for more details. __________________ dither 1.28.1 for AviSynth \| avstp 1.0.4 for AviSynth development \| fmtconv r30 for Vapoursynth & Avs+ \| trimx264opt segmented encoding

2nd June 2022, 13:50	#6 \| Link
cretindesalpes ͡҉҉ ̵̡̢̛̗̘̙̜̝̞̟̠͇̊̋̌̍̎̏̿̿ Join Date: Feb 2009 Location: No support in PM Posts: 712	ChickenDream r2: Allowed larger grain radius when using large standard deviation values. Added a draft parameter. Changed the configure options to compile with Clang. Fixed a crash when the picture width is not a multiple of 8 (thanks to MonoS for the report). __________________ dither 1.28.1 for AviSynth \| avstp 1.0.4 for AviSynth development \| fmtconv r30 for Vapoursynth & Avs+ \| trimx264opt segmented encoding

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12th April 2022, 00:21	#2 \| Link
kedautinh12 Registered User Join Date: Jan 2018 Posts: 2,156	avstp still error with mvtool2, i think need update for fix it

12th April 2022, 22:14	#4 \| Link
DTL Registered User Join Date: Jul 2018 Posts: 1,065	Natural photon shot noise have Gaussian distribution (at medium and high levels). Do it have Gaussian distribution or other ? We need some source of Gauss distributed noise generator to test denoise processing with closeer to natural noise (I think AddNoise() plugin do not have Gauss distribution ?).

1st March 2023, 22:19	#7 \| Link
ognirats Registered User Join Date: Sep 2021 Posts: 30	https://forum.videohelp.com/threads/...n-generator%29 help. linked videohelp thread