How to find the best denoiser?

[JensG.]

Is there a way other than trial and error to find the denoising filter which is best suited for a given source? Is there a way to find the percentage and kind of noise, so that based upon that examination a preselection of the best filter can be made?
In the end there usually is the personal preference that counts, but I wonder if there aren't any objective values concerning noise.
I am a bit confused about the diversity of different filters :confused:

[bilu]

This thread may answer some of your questions:

http://forum.doom9.org/showthread.php?s=&threadid=51181


Bilu

[JensG.]

Originally posted by bilu
This thread may answer some of your questions:

http://forum.doom9.org/showthread.php?s=&threadid=51181
Unfortunately not. I knew that interesting thread and think it displays the same questions that I have. It shows the trial and error method. Of course I could try each filter on any source and compare, but I would like to understand (and predict) which filter would be suited best for a given source.
Is there any basic material about video noise available?

[bilu]

Maybe someone can give basic references, but this is what I've remembered:

From http://www.avisynth.org/index.php?page=FilterSDK

"Some video related ebooks (PDF) can be downloaded freely from Snell & Wilcox (http://www.snellwilcox.com/reference.html)."


Bilu

[Acaila]

Adequate noise reduction is one of the most difficult areas in Signal Processing (be it video, audio or anything else). Aside from very complicated mathematical formulas the most feasible way is still trial and error, because the books that are available on this subject don't cover the avisynth filters that are currently available. Which probably means that whichever way you will find to work best will require a new filter.

[JensG.]

Thanks a lot for the links, Bilu, and for the bad news, too, Acaila!