The function implements simple dct-based denoising

dst = cv.dctDenoising(src)
dst = cv.dctDenoising(src, 'OptionName',optionValue, ...)

Input

• src source image (gray or RGB). Internally the function operates on single data type.

Output

• dst destination image, same size and type as input src.

Options

• Sigma expected noise standard deviation. Default 10.0
• BlockSize size of block side where DCT is computed. Default 16

See [YSDCT11]. The function is parallelized.

References

[YSDCT11]:

Guoshen Yu and Guillermo Sapiro. "DCT image denoising: a simple and effective image denoising algorithm", Image Processing On Line, 1 (2011). DOI