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Why median filter is considered as good for removal of salt and pepper noise? What are the other filters used for the same?

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    $\begingroup$ Related: dsp.stackexchange.com/questions/15203/… and dsp.stackexchange.com/questions/7819/… $\endgroup$ – A_A Nov 18 '15 at 9:25
  • $\begingroup$ Salt and Pepper noise is often modeled as a multiplicative noise process - the power of the noise is proportional to the power of the signal of interest. Therefore traditional low-pass or other frequency domain approaches aren't very effective. A median filter is a non-linear filter and is more effective against this type of noise. Wouldn't go so far as to say it's the best - it depends how you define best. $\endgroup$ – David Nov 18 '15 at 13:55
  • $\begingroup$ "The best" is a bit all-encompassing. The best out of what, and based on what criteria? $\endgroup$ – Simon B Nov 18 '15 at 13:56

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