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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/filters.texi | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 33e27e10f3..afa3984447 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -8696,6 +8696,40 @@ fftfilt=dc_Y=0:weight_Y='exp(-4 * ((Y+X)/(W+H)))' @end itemize +@section fftdnoiz +Denoise frames using 3D FFT (frequency domain filtering). + +The filter accepts the following options: + +@table @option +@item sigma +Set the noise sigma constant. This sets denoising strength. +Default value is 1. Allowed range is from 0 to 30. +Using very high sigma with low overlap may give blocking artifacts. + +@item amount +Set amount of denoising. By default all detected noise is reduced. +Default value is 1. Allowed range is from 0 to 1. + +@item block +Set size of block, Default is 4, can be 3, 4, 5 or 6. +Actual size of block in pixels is 2 to power of @var{block}, so by default +block size in pixels is 2^4 which is 16. + +@item overlap +Set block overlap. Default is 0.5. Allowed range is from 0.2 to 0.8. + +@item prev +Set number of previous frames to use for denoising. By default is set to 0. + +@item next +Set number of next frames to to use for denoising. By default is set to 0. + +@item planes +Set planes which will be filtered, by default are all available filtered +except alpha. +@end table + @section field Extract a single field from an interlaced image using stride |