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# Image denoising techniques

## dctDenoising

C++:`` void `dctDenoising`(const Mat& src, Mat& dst, const float sigma)

  > The function implements simple dct-based denoising, link: http://www.ipol.im/pub/art/2011/ys-dct/.

  Parameters: | src – source image dst – destination image sigma – expected noise standard deviation psize – size of block side where dct is computed

See also

`fastNlMeansDenoising()`

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