資源簡介
幾種經典的圖像平滑去噪算法程序,其中包括小波軟閾值和硬閾值處理。還有三個圖像質量評價程序

代碼片段和文件信息
function?b?=?meanfilt2(varargin)
%MEDFILT2?Perform?2-D?median?filtering.
%???B?=?MEDFILT2(A[M?N])?performs?median?filtering?of?the?matrix
%???A?in?two?dimensions.?Each?output?pixel?contains?the?median
%???value?in?the?M-by-N?neighborhood?around?the?corresponding
%???pixel?in?the?input?image.?MEDFILT2?pads?the?image?with?zeros
%???on?the?edges?so?the?median?values?for?the?points?within?
%???[M?N]/2?of?the?edges?may?appear?distorted.
%
%???B?=?MEDFILT2(A)?performs?median?filtering?of?the?matrix?A
%???using?the?default?3-by-3?neighborhood.
%
%???B?=?MEDFILT2(...PADOPT)?controls?how?the?matrix?boundaries
%???are?padded.??PADOPT?may?be?‘zeros‘?(the?default)
%???‘symmetric‘?or?‘indexed‘.?If?PADOPT?is?‘zeros‘?A?is?padded
%???with?zeros?at?the?boundaries.?If?PADOPT?is?‘symmetric‘?A?is
%???symmetrically?extended?at?the?boundaries.?If?PADOPT?is
%???‘indexed‘?A?is?padded?with?ones?if?it?is?double;?otherwise
%???it?is?padded?with?zeros.
%
%???Class?Support
%???-------------
%???The?input?image?A?can?be?logical?or?numeric?(unless?the?
%???‘indexed‘?syntax?is?used?in?which?case?A?cannot?be?of?class?
%???uint16).??The?output?image?B?is?of?the?same?class?as?A.
%
%???Remarks
%???-------
%???If?the?input?image?A?is?of?integer?class?all?of?the?output
%???values?are?returned?as?integers.?If?the?number?of
%???pixels?in?the?neighborhood?(i.e.?M*N)?is?even?some?of?the
%???median?values?may?not?be?integers.?In?these?cases?the
%???fractional?parts?are?discarded.?Logical?input?is?treated
%???similarly.
%
%???Example
%???-------
%???????I?=?imread(‘eight.tif‘);
%???????J?=?imnoise(I‘salt?&?pepper‘0.02);
%???????K?=?medfilt2(J);
%???????imview(J)?imview(K)
%
%???See?also?FILTER2?ORDFILT2?WIENER2.
%???Copyright?1993-2003?The?MathWorks?Inc.??
%???$Revision:?5.22?$??$Date:?2003/01/27?20:16:04?$
[a?mn?padopt]?=?parse_inputs(varargin{:});
domain?=?ones(mn);
if?(rem(prod(mn)?2)?==?1)
????order?=?(prod(mn)+1)/2;
????b?=?ordfilt2(a?order?domain?padopt);
else
????order1?=?prod(mn)/2;
????order2?=?order1+1;
????b?=?ordfilt2(a?order1?domain?padopt);
????b2?=?ordfilt2(a?order2?domain?padopt);
????idx?=?find(b?~=?b2);
????b(idx)?=?(double(b(idx))?+?double(b2(idx)))/2;
end
%%%
%%%?Function?parse_inputs
%%%
function?[a?mn?padopt]?=?parse_inputs(varargin)
checknargin(14narginmfilename);
%?There?are?several?grandfathered?syntaxes?we?have?to?catch
%?and?parse?successfully?so?we‘re?going?to?use?a?strategy
%?that‘s?a?little?different?that?usual.
%
%?First?scan?the?input?argument?list?for?strings.??The
%?string?‘indexed‘?‘zeros‘?or?‘symmetric‘?can?appear?basically
%?anywhere?after?the?first?argument.
%
%?Second?delete?the?strings?from?the?argument?list.
%
%?The?remaining?argument?list?can?be?one?of?the?following:
%?MEDFILT2(A)
%?MEDFILT2(A[M?N])
%?MEDFILT2(A[M?N][Mb?Nb])
%
%?Any?syntax?in?which?‘indexed‘?is?followed?by?other?arguments
%?is?grandfathered.??Any?sy
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????1012??2006-04-22?21:52??smooth.m
?????文件????????189??2005-05-30?10:08??zhongzhilvbo.m
?????文件????????388??2005-04-19?10:09??xbquzao.m
?????文件????????334??2005-06-04?18:04??wavelethardthreshold.m
?????文件????????290??2005-06-03?16:59??NMSE.m
?????文件????????350??2005-06-04?19:45??RMS.m
?????文件????????465??2006-08-08?20:46??psnr.m
?????文件???????4439??2005-06-04?19:18??meanfilt2.m
-----------?---------??----------?-----??----
?????????????????7467????????????????????8
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