function?g?=?dftfilt（f?H）
%DFTFILT?Performs?frequency?domain?filtering.
%???G?=?DFTFILT（F?H）?filters?F?in?the?frequency?domain?using?the
%???filter?transfer?function?H.?The?output?G?is?the?filtered
%???image?which?has?the?same?size?as?F.??DFTFILT?automatically?pads
%???F?to?be?the?same?size?as?H.??Function?PADDEDSIZE?can?be?used?to
%???determine?an?appropriate?size?for?H.
%
%???DFTFILT?assumes?that?F?is?real?and?that?H?is?a?real?uncentered
%???circularly-symmetric?filter?function.?

%???Copyright?2002-2004?R.?C.?Gonzalez?R.?E.?Woods?&?S.?L.?Eddins
%???Digital?Image?Processing?Using?MATLAB?Prentice-Hall?2004
%???$Revision:?1.5?$??$Date:?2003/08/25?14:28:22?$

%?Obtain?the?FFT?of?the?padded?input.
F?=?fft2（f?size（H?1）?size（H?2））;

%?Perform?filtering.?
g?=?real（ifft2（H.*F））;

%?Crop?to?original?size.
g?=?g（1:size（f?1）?1:size（f?2））;

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件????????882??2004-12-16?13:36??低通濾波\dftfilt.m

?????文件????????736??2004-12-16?13:36??低通濾波\dftuv.m

?????文件???????2087??2004-12-16?13:36??低通濾波\gscale.m

?????文件???????1473??2004-12-16?13:36??低通濾波\lpfilter.m

?????文件????????710??2010-04-06?14:27??低通濾波\lpfilter_exam.m

?????文件????????348??2009-03-22?09:06??低通濾波\paddedsize.m

?????文件?????264508??2003-10-30?10:22??低通濾波\lenna.gif

?????目錄??????????0??2011-06-08?22:23??低通濾波

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???????????????270744????????????????????8