function?g?=?dftfilt（f?H?classout）
%DFTFILT?Performs?frequency?domain?filtering.
%???g?=?DFTFILT（f?H?CLASSOUT）?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.?
%
%???Valid?values?of?CLASSOUT?are
%
%	‘original‘	The?ouput?is?of?the?same?class?as?the?input.?
%???????????????This?is?the?default?if?CLASSOUT?is?not?included
%???????????????in?the?call.
%	‘fltpoint‘	The?output?is?floating?point?of?class?single?unless
%???????????????both?f?and?H?are?of?class?double?in?which?case?the
%???????????????output?also?is?of?class?double.
%
%???DFTFILT?automatically?pads?f?to?be?the?same?size?as?H.?Both?f
%???and?H?must?be?real.?In?addition?H?must?be?an?uncentered
%???circularly-symmetric?filter?function.??

%???Copyright?2002-2009?R.?C.?Gonzalez?R.?E.?Woods?and?S.?L.?Eddins
%???From?the?book?Digital?Image?Processing?Using?MATLAB?2nd?ed.
%???Gatesmark?Publishing?2009.
%
%???Book?web?site:?http://www.imageprocessingplace.com
%???Publisher?web?site:?http://www.gatesmark.com/DIPUM2e.htm

%?Convert?the?input?to?floating?point.
[f?revertClass]?=?tofloat（f）;

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

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

%?Crop?to?original?size.
g?=?g（1:size（f?1）?1:size（f?2））;?%?g?is?of?class?single?here.

%?Convert?the?output?to?the?same?class?as?the?input?if?so?specified.
if?nargin?==?2?||?strcmp（classout?‘original‘）
???g?=?revertClass（g）;
elseif?strcmp（classout?‘fltpoint‘）?%?g?is?floating?point?already.
???return
else
???error（‘Undefined?class?for?the?output?image.‘）
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????1697??2013-10-22?00:41??源碼\dftfilt.m

?????文件???????2191??2013-10-22?00:41??源碼\gscale.m

?????文件????????560??2014-10-27?14:51??源碼\main.m

?????文件???????3938??2014-10-27?11:09??源碼\recnotch.m

?????文件???????1132??2013-10-22?00:41??源碼\tofloat.m

?????目錄??????????0??2014-11-06?15:51??源碼

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?????????????????9518????????????????????6