Wiener filter is a filter used to produce an estimate of a desired or target random process by linear time-invariant filtering an observed noisy process, assuming known stationary signal and noise spectra, and additive noise. The Wiener filter minimizes the mean square error between the estimated random process and the desired process.

Application of the Wiener filter for noise suppression.

Wiener filter has often been used in image processing and signal processing, but it is difficult for young students, so we collected some matlab source code for you, hope they can help.