Nice AVS Script to Deal With Moving Grain

[Soopafresh]

Thanks to Didee over at doom9. It doesn't remove the grain or smooth out the image. It "calms" the fast flickery grain often seen with HD movies or films from the 60s and 70s. It's subtle, but quite noticeable, especially on HD.



The image on top is the source, the one below is calmed:

xvidbw.avi


Read the top of the script for the required plugins. It runs very fast


http://forum.doom9.org/showthread.php?p=1073349#post1073349

[vhelp]

Thanks Soopafresh, for the interesting article read.

I mostly like to see how far we are going in the things of noise removal and compression
methods. And, in a few of my programming image projects, (working with various types of
Spacial and Temporal NR algorithms) I have found that the two work differently though
depending on the source video's noise content and level.. ie, if the video is from an Analog
source (ie, cable/antenna) there is lots of salt n pepper, while in mpeg (ie, digital/satelite)
there is no noise but lots of pixelation/DCT/dancing blocks. And, in the First, you have
Spac/Temp algos that do mostly good results, while in the Second, (mpeg) you have to use
a completely differernt apprach completely, because there is no noise, but various kinds of
blocks -- as seen as noise.. of a different kind or nature. Anyway.

I tried to D/L that sample clip that the user claimed was unprocessed, but I couldn't get it
over my dial up because it kept breaking the connection after aprox 600kb of data. That
only gave me about 5 frames to work with. However, either the person re-encoded it to
XviD and used that as the unprocessed source vs. the (his) processed source, or his
source was from a video downlaod site that he got it from. Either way, (and unfortuantely)
the help he was trying to get was partly in vain because the source he posted was not HD
(or blue-ray) but re-processed to another as codec, XviD -- per the partially D/L clip I did
manage to get. I was really looking forward to this yet another method. Its always nice
to try other methods when looking for lowering mileage in a source video file.

But, in looking at the part. clip in had, it was def plauged by grain noise, but also DCT or
dancing blocks, too. There was also noticable pixelation in the midst of it all, which gave
even more weight to the confusion of the perceived floating/dancing pixels blocks in that
scene. Another reason I hate the sort of vain'ness in this so called Higher quality HD/BlueRay
source medium. Such a pitty.

Soopafresh, have you tried testing script in any of your source trials ??

-vhelp 4467

:P *~*!*~*!~* HaPpY HoLiDaYs *~*!*~*!~*

[Soopafresh]

Soopafresh, have you tried testing script in any of your source trials ??


Yes, the example clip I posted shows the results of the filtering. It only affects the lower frequencies, so the resulting image barely looks different, except that the flickering that is so common with this type of older film is greatly reduced. The reduction is most noticeable on large flat areas, such as sky and walls.