Adaptive vs Non Adaptive Filters
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I am struggling to understand the difference between adaptive and non adaptive filters in general. Also, in terms of the Wiener filter, I have seen it referred to as both an adaptive and a non adaptive filter. So what makes a filter adaptive or non adaptive? Thanks
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Accepted Answer
Shashank Prasanna
on 21 May 2013
I think wiki sums it pretty well:
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Image Analyst
on 22 May 2013
Not exactly. MATLAB says that the wiener2 filter (not the wiener filter) "filters the image I using pixelwise adaptive Wiener filtering". So wiener2 uses wiener but changes it (adapts it) as it slides along the image.
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Youssef Khmou
on 22 May 2013
Edited: Youssef Khmou
on 22 May 2013
hi, i think that :
The adaptive filter is usually linked to dynamic systems , the time is involved in the equations, so the filter performs the filtering actions at time t (t+1) based on posterior state t-1 (t), this way the filter adapts itself to new conditions it meets meaning that if the signal to be filtered has harsh fluctuations the filter operates based on those fluctuations,
Non adaptive filter, is a simple protocol ( algorithm) that can be applied to the signal without computing some statistics,
The problem of adaptive or not is based on Frequency Response ( Finite or not) and the intuition is that the adaptive filter performs well better that the non adaptive one .
The topic is open for discussion .
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