VagueDenoiser : Wavelet Denoiser for Avisynth 2.5+
(v0.22)

This filter is designed for Avisynth 2.5 and above
it's able to filter in YUY2 and YV12 colorspaces

What it does:

This is a Wavelet based Denoiser. Basically, it transforms each frame from the video input into the wavelet domain, using various wavelet filters. Then it applies some filtering to the obtained coefficients. It does an inverse wavelet transform after. Due to wavelet properties, it gives a nice smoothed result, and noise is removed, without blurring picture features. This wavelet transform could be done on each plane of the colorspace.

Exemples Usage of VagueDenoiser filter:

(all the avisynth script lines here are only exemples)



Some settings i like :

For light filtering on a movie. (medium->threshold=1-1.5 ; strong->threshold= 2-3)

VagueDenoiser(filter=7,threshold=0.8,method=1,nsteps=6,chroma= true)

For light filtering on an anime. (medium->threshold=2 ; strong->threshold=4)

VagueDenoiser(filter=7,threshold=1.5,method=1,nsteps=6,chroma=true)

Syntax of VagueDenoiser filter:

VagueDenoiser :



VagueDenoiser(int "filter" int "threshold" int "method", int "nsteps", bool "chroma")


filter : 0 to 15.
Filter used during the wavelet transform. So far Brislawn 10/10 seems to give best results.

- 0:  Haar
- 1:  Daubechies 4
- 2:  Daubechies 6
- 3:  Daubechies 8
- 4:  Antonini 9/7
- 5:  Adelson 9/9
- 6:  Brislawn 9/7
- 7:  Brislawn 10/10
- 8:  Villa 2/6
- 9:  Villa 5/3
- 10: Villa 6/10
- 11: Villa 9/3
- 12: Villa 9/7
- 13: Villa 10/18
- 14: Villa 13/11
- 15: Odegard 9/7


threshold : a float >0
      Filtering strength. The higher, the more filtered the clip will be. Hard thresholding can use a higher threshold than Soft thresholding before the clip looks overfiltered.

method : 0 to 1
The filtering method the filter will use.
0 : Hard Thresholding. All values under the threshold will be zeroed.
1 : Soft Thresholding. All values under the threshold will be zeroed. All values above will be reduced by the threshold.


nsteps : 1<int<8
Number of times, the wavelet will decompose the picture. High values can be slower but results will be better.
Suggested values are 3-6.


chroma : true or false
chroma=true enable Chroma filtering. It is slower but give better results

History :

v 0.12 First Release

- Precision problems corrected, 0 for threshold is now lossless

v 0.13
- Hard thresholding method enabled
- Cosmetic changes
- Avisynth parameters changed

v 0.2
- Implemented many new wavelet filters, thanks to the wavelet transform coder construction kit.
  look at http://www.geoffdavis.net/ for more informations.
- Implemented nsteps parameter, that allow you to use n steps in the selected wavelet tranform.
  Some nsteps values could produce unvalid results, reducing this value generally solve the problem.
- Little optimizations from Shodan and Bidoche.


v 0.22
- YUY2 colorspace support 
- Optionnal chroma filtering, (chroma=true/false)
- Cosmetic changes, code cleaned
- Html documentation

Credits :

Everyone at Doom9.org for their counsels.
MarcFD for his mpegdec3 html documentation. This html is the same but with modified contents.
Geoff Davis, author of the wavelet transform coder construction kit.

Code Distribution :

This is a free sofware distribued under the terms of the GNU-GPL v2

Contact :

You can  e-mail me for any suggestion, bug report, feature request, or whatever.

Goto http://forum.doom9.org for support.