function?dss?=?diffss（ss）
%?DIFFSS??Difference?of?scale?space
%???DSS=DIFFSS（SS）?returns?a?scale?space?DSS?obtained?by?subtracting
%???consecutive?levels?of?the?scale?space?SS.
%
%???In?SIFT?this?function?is?used?to?compute?the?difference?of
%???Gaussian?scale?space?from?the?Gaussian?scale?space?of?an?image.
%
%???See?also?GAUSSIANSS（）?PDF:SIFT.USER.SS.

%?AUTORIGHTS
%?Copyright?（c）?2006?The?Regents?of?the?University?of?California.
%?All?Rights?Reserved.
%?
%?Created?by?Andrea?Vedaldi
%?UCLA?Vision?Lab?-?Department?of?Computer?Science
%?
%?Permission?to?use?copy?modify?and?distribute?this?software?and?its
%?documentation?for?educational?research?and?non-profit?purposes
%?without?fee?and?without?a?written?agreement?is?hereby?granted
%?provided?that?the?above?copyright?notice?this?paragraph?and?the
%?following?three?paragraphs?appear?in?all?copies.
%?
%?This?software?program?and?documentation?are?copyrighted?by?The?Regents
%?of?the?University?of?California.?The?software?program?and
%?documentation?are?supplied?“as?is“?without?any?accompanying?services
%?from?The?Regents.?The?Regents?does?not?warrant?that?the?operation?of
%?the?program?will?be?uninterrupted?or?error-free.?The?end-user
%?understands?that?the?program?was?developed?for?research?purposes?and
%?is?advised?not?to?rely?exclusively?on?the?program?for?any?reason.
%?
%?This?software?embodies?a?method?for?which?the?following?patent?has
%?been?issued:?“Method?and?apparatus?for?identifying?scale?invariant
%?features?in?an?image?and?use?of?same?for?locating?an?object?in?an
%?image“?David?G.?Lowe?US?Patent?6711293?（March?23
%?2004）.?Provisional?application?filed?March?8?1999.?Asignee:?The
%?University?of?British?Columbia.
%?
%?IN?NO?EVENT?SHALL?THE?UNIVERSITY?OF?CALIFORNIA?BE?LIABLE?TO?ANY?PARTY
%?FOR?DIRECT?INDIRECT?SPECIAL?INCIDENTAL?OR?CONSEQUENTIAL?DAMAGES
%?INCLUDING?LOST?PROFITS?ARISING?OUT?OF?THE?USE?OF?THIS?SOFTWARE?AND
%?ITS?DOCUMENTATION?EVEN?IF?THE?UNIVERSITY?OF?CALIFORNIA?HAS?BEEN
%?ADVISED?OF?THE?POSSIBILITY?OF?SUCH?DAMAGE.?THE?UNIVERSITY?OF
%?CALIFORNIA?SPECIFICALLY?DISCLAIMS?ANY?WARRANTIES?INCLUDING?BUT?NOT
%?LIMITED?TO?THE?IMPLIED?WARRANTIES?OF?MERCHANTABILITY?AND?FITNESS?FOR
%?A?PARTICULAR?PURPOSE.?THE?SOFTWARE?PROVIDED?HEREUNDER?IS?ON?AN?“AS?IS“
%?BASIS?AND?THE?UNIVERSITY?OF?CALIFORNIA?HAS?NO?OBLIGATIONS?TO?PROVIDE
%?MAINTENANCE?SUPPORT?UPDATES?ENHANCEMENTS?OR?MODIFICATIONS.

dss.smin?=?ss.smin?;
dss.smax?=?ss.smax-1?;
dss.omin?=?ss.omin?;
dss.O?=?ss.O?;
dss.S?=?ss.S?;
dss.sigma0?=?ss.sigma0?;

for?o=1:dss.O
??%?Can?be?done?at?once?but?it?turns?out?to?be?faster
??%?this?way
??[MNS]?=?size（ss.octave{o}）?;
??dss.octave{o}?=?zeros（MNS-1）?;
??for?s=1:S-1
????dss.octave{o}（::s）?=?...
????????ss.octave{o}（::s+1）?-?ss.octave{o}（::s）?;
??end
end

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

?????文件???12432744??2014-06-09?13:05??圖像識別\04306137Houghbianhuan\2400m.tif

?????文件???????1774??2014-09-12?17:07??圖像識別\04306137Houghbianhuan\Houghbianhuan.m

?????文件???????5731??2005-11-12?11:11??圖像識別\20954741threshold-roc\threshold-roc\1.jpg

?????文件???????4788??2005-11-12?11:11??圖像識別\20954741threshold-roc\threshold-roc\2.jpg

?????文件????????250??2014-09-12?15:03??圖像識別\20954741threshold-roc\threshold-roc\autoT.m

?????文件???????9176??2005-10-21?19:07??圖像識別\20954741threshold-roc\threshold-roc\BrainSliceH4.png

?????文件????????285??2005-12-03?01:37??圖像識別\20954741threshold-roc\threshold-roc\HysteresisThreshold.asv

?????文件?????????45??2005-10-28?19:51??圖像識別\20954741threshold-roc\threshold-roc\include.m

?????文件?????????89??2005-10-28?19:20??圖像識別\20954741threshold-roc\threshold-roc\neighbour.m

?????文件???????1063??2005-12-03?09:09??圖像識別\20954741threshold-roc\threshold-roc\NonMax.asv

?????文件????????634??2005-10-29?06:28??圖像識別\20954741threshold-roc\threshold-roc\regiongrow.m

?????文件???????3598??2005-11-12?18:53??圖像識別\20954741threshold-roc\threshold-roc\roc.fig

?????文件????????145??2005-11-05?18:15??圖像識別\20954741threshold-roc\threshold-roc\threshold.m

?????文件????????159??2005-10-29?05:13??圖像識別\20954741threshold-roc\threshold-roc\threshold1.m

?????文件????????182??2005-10-29?05:31??圖像識別\20954741threshold-roc\threshold-roc\threshold2.m

?????文件?????464954??2006-04-05?06:45??圖像識別\data\img3.jpg

?????文件????1420810??2006-04-05?06:45??圖像識別\data\img3.sift

?????文件?????467808??2006-04-05?06:45??圖像識別\data\img5.jpg

?????文件????1585635??2006-04-05?06:45??圖像識別\data\img5.sift

?????文件?????275111??2006-05-01?21:51??圖像識別\data\landscape-a.jpg

?????文件?????304723??2006-05-01?21:52??圖像識別\data\landscape-b.jpg

?????文件???????7620??2006-04-05?06:45??圖像識別\data\test.png

?????文件??????34162??2006-04-05?06:45??圖像識別\data\test.sift

?????文件???????2797??2006-05-12?23:43??圖像識別\diffss.m

?????文件????????246??2006-04-11?09:37??圖像識別\doc\bibliography.bib

?????文件????????550??2006-04-28?01:02??圖像識別\doc\figures\sift-descriptor-AI.bb

?????文件?????475918??2006-04-28?01:02??圖像識別\doc\figures\sift-descriptor-AI.pdf

?????文件???????3275??2006-04-28?01:00??圖像識別\doc\figures\sift-descriptor-SAVED.tex

?????文件??????????8??2006-04-28?01:03??圖像識別\doc\figures\sift-descriptor.aux

?????文件??????13430??2006-04-28?01:03??圖像識別\doc\figures\sift-descriptor.log

............此處省略49個文件信息