Is Median Filter a type of shift-invariant system?

[contagiouseddie]

Median Filter

Is Median Filter a type of shift-invariant (time-invariant) system? Thanks.

 

[pimr]

Re: Median Filter

hi,
no it is not a time invariant system.
pimr

 

[contagiouseddie]

Re: Median Filter

Thanks. But, how can we model the Median Filter Impulse Response ( h([n]) as a mathematical function? I found that most reading materials on Median Filter are rather advance and not treating Median Filter at the most simplest way of explaining.

 

[pimr]

Re: Median Filter

hi,
try this link for understanding what a median filter is
**broken link removed**
it is not a linear filter and therefore does not use convolution which
means that even if you have its impulse response(i don't know if it exists!) you won't be able
to apply usual signal processing techniques on it,moreover it is statistical
operator which come in general class of rank order statistics.
regards
pimr