Article View: comp.dsp
Article #1599Re: Mean Value Filter
From: Richard Ottolini
Date: Wed, 20 Mar 1991 22:48
Date: Wed, 20 Mar 1991 22:48
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In article <1991Mar20.003425.14767@sunee.waterloo.edu> rchann@sunee.waterloo.edu (Robert Chann) writes: >I'm trying to implement a mean value filter. That is, using an nxn >window, each picture element is substituted by the mean value of the >(nxn) neighbouring picture elements. >Apparently, by using a "sophisticated" implementation, no more than >approximately two additions per pel are required for the filtering. >The number of addition is nearly independent of the filter window >size and no multiplication is necessary. Simple. Use a rolling window. Add elements of the leading edges and subtract elements of the trailing edges.
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<1991Mar20.224801.7413@leland.Stanford.EDU>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!swrinde!cs.utexas.edu!uwm.edu!bionet!agate!stanford.edu!leland.Stanford.EDU!hanauma!rickReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!swrinde!cs.utexas.edu!uwm.edu!bionet!agate!stanford.edu!leland.Stanford.EDU!hanauma!rick From: rick@hanauma.stanford.edu (Richard Ottolini) Newsgroups: comp.dsp,comp.graphics Subject: Re: Mean Value Filter Keywords: image processing, filter Message-ID: <1991Mar20.224801.7413@leland.Stanford.EDU> Date: 20 Mar 91 22:48:01 GMT References: <1991Mar20.003425.14767@sunee.waterloo.edu> Sender: news@leland.Stanford.EDU (Mr News) Organization: Stanford University, Department of Geophysics Lines: 12