ChickenDream: realistic film grain generator

[cretindesalpes]

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

>>> chickendream-r2.zip <<< (https://ldesoras.fr/src/vs/chickendream-r2.zip)

https://i.postimg.cc/FKR88BrT/grain.png
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 (https://github.com/EleonoreMizo/chickendream).

[kedautinh12]

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

[anton_foy]

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

>>> chickendream-r1.zip <<< (http://ldesoras.free.fr/src/vs/chickendream-r1.zip)

https://i.postimg.cc/FKR88BrT/grain.png
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 (https://github.com/EleonoreMizo/chickendream).

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]

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]

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 (https://hal.archives-ouvertes.fr/hal-01520260), Computer Graphics Forum, Wiley, 2017
Alasdair Newson, Noura Faraj, Julie Delon, Bruno Galerne, Realistic Film Grain Rendering (https://www.ipol.im/pub/art/2017/192), 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]

ChickenDream r2 (https://forum.doom9.org/showthread.php?p=1967245#post1967245):
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]

https://forum.videohelp.com/threads/408800-NOT-WORKING-ChickenDream-%28film-grain-generator%29

help. linked videohelp thread