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  1. Member
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    Nov 2007
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    Hi everyone!

    Can you suggest a good way to remove chroma noise? The scenes are pretty static. I'm new to avisynth but I tried Cnr2. It did help a little but I have no idea how to tweak it for better results or should I even use it. I will upload a clip. The clip is rendered WITHOUT Cnr2. It's a progressive file.

    Code:
    dehalo_alpha(rx=2, ry=2)
    TemporalDegrain(SAD1=200, SAD2=150, sigma=8)
    Cnr2("oxx",8,14,191,75,255,20,255,false)
    Sharpen(0.2)
    nnedi3_rpow2(2, cshift="Spline36Resize", fwidth=1280, fheight=720)
    Sharpen(0.2)
    nnedi3_rpow2(2, cshift="Spline36Resize", fwidth=1920, fheight=1080)
    Sharpen(0.2)
    Image Attached Files
    Last edited by Srivas; 26th Dec 2015 at 09:44.
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  2. Video Restorer lordsmurf's Avatar
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    Avisynth chroma filters are not the greatest.
    The Camcorder Color Denoise (CCD) filter for VirtualDub is better.
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  3. Member
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    Lordsmurf, thank you! This solved it!
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  4. You should denoise before you upscale.
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  5. Member
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    Yes, I did that. Btw. Jagabo, I wanted to ask, why do upscaling in two phases? I read that it gives better results and if that is so, how do you calculate the first phase resolution? I mean, for example I want to upscale from 720x576 to 1280x720, so that means to first upscale to something in between of those two resolutions and then to the final resolution?
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  6. When upscaling SD to 1080p I use nnedi3 to upscale about half way, sharpen a bit, then the other half, and sharpen a bit again. But for 720x576 to 960x720 I would just use one upscale.
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