CCD is a simple chroma denoiser. It works by selectively averaging pixels in a 25x25 matrix below the Euclidean distance threshold in an RGB clip. After denoising, the clip should be converted back to YUV / YCoCg, and the luma channel should be copied from the input.
Currently, CCD only supports RGBS input and will not copy the original luma for you, so for convinience, a python wrapper is included which can handle this.
Vapoursynth port of the original filter by Sergey Stolyarevsky.
Plugin - probably shouldn't be used directly!
ccd.CCD(clip clip, float threshold=4)
Python wrapper
import ccd
ccd.ccd(clip: vs.VideoNode, threshold: float = 4, matrix: Optional[str] = None)Parameters
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clip: Input clip. Plugin only supports RGBS, wrapper accepts any format except Gray and Compat.
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threshold: Euclidean distance threshold for including pixel in the matrix. Higher values = more denoising. A good range seems to be 4-10.
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matrix: Colour matrix for the wrapper to use for conversions to and from YUV/RGB. Will be guessed by the wrapper if left unspecified from frame props or frame size. Values are the same as Vapoursynth's resize.
If you're on Windows - congratulations! Just download the binary and wrapper from the releases page, and drop them into their usual places.
If you're a linux weirdo, then see the compilation instructions for the plugin below.
meson build
ninja -C buildOr you can use cmake - though I don't know how it works, and Scrad added it. Blame him if it fails, not me.
Vapoursynth, obviously. That's it though :pogchamp:
CCD is basically a bilateral filter, with the following characteristics:
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Weight functions are simplified to a box instead of a Gaussian.
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The kernel is subsampled, default is 8× in each direction, so 256× total.
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Works on full pixels, not just on independent color channels as video filters often do.