Does anybody know how to remove this noise in the blue area?

[dphirschler]

Does anybody know how to filter/smooth this?



Notice the "noise" in the blue area above their heads. What to do other than hand edit?


Darryl

[poisondeathray]

Sort of looks like dropouts; you can try the removedirt/dust filters in avisynth

What is the pattern? Does this occur on 1 frame only or multiple frames?

What is the distribution? only top half? If so you could limit the filter by overlay

Maybe a small video sample would help

[dphirschler]

It occurs mainly in the large blue area above their heads, and only in this scene. The rest of the video is clean. Here's an xvid-compressed sample.


Darryl

[poisondeathray]

any "automatic" filters will destroy the good parts , making them very blurry, and the demarcation isn't a perfect grid (you can't just do a horizontal overlay strip, or you'll cut off pieces like heads)

to do a good repair you will need some hand work to limit the repair - rotoscoping, masks, maybe with something like after effects would make it easier to do than photoshop

[filmboss80]

Was the original source VHS? This looks like classic chroma noise. Difficult to remove without blurring the rest of the picture.

[dphirschler]

The source is SVHS. I was hoping to fix it without much hand editing. If I make a mask, I can heavily filter the blue area without losing detail. I am just not sure which filter to use.


Darryl

[poisondeathray]

Your re-encoded /resized sample destroys the relationship of the dirt/dust . If you use the original capture, using removedirt and removedustmc or related functions will get you a clean background on one of the initial frames of that section. With that, you can clone the rest with masks/roto

[budwzr]

How's this look? http://www.youtube.com/watch?v=Cg0yoskbMm8

Done with Vegas Pro, Chroma Key filter, no "handwork".

You can drop this clip into that scene and be done with this.