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具有含有最近年的改进sift研究文献,有便于深入了解局部特征研究领域
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内容介绍
<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/6254db6047503a0a93cceb35/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6254db6047503a0a93cceb35/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">Col<span class="_ _0"></span>or<span class="_ _1"> </span>ima<span class="_ _0"></span>ge<span class="_ _1"> </span>ret<span class="_ _0"></span>ri<span class="_ _0"></span>eval<span class="_ _1"> </span>te<span class="_ _0"></span>ch<span class="_ _0"></span>niq<span class="_ _0"></span>ue<span class="_ _1"> </span>with<span class="_ _1"> </span>lo<span class="_ _0"></span>cal<span class="_ _1"> </span>fea<span class="_ _0"></span>tur<span class="_ _0"></span>es<span class="_ _1"> </span>ba<span class="_ _0"></span>se<span class="_ _0"></span>d</div><div class="t m0 x1 h2 y2 ff1 fs0 fc0 sc0 ls0 ws0">on<span class="_ _1"> </span>orth<span class="_ _0"></span>og<span class="_ _0"></span>onal<span class="_ _1"> </span>po<span class="_ _0"></span>ly<span class="_ _0"></span>nom<span class="_ _0"></span>ials<span class="_ _1"> </span>mo<span class="_ _0"></span>del<span class="_ _1"> </span>an<span class="_ _0"></span>d<span class="_ _1"> </span>SIFT</div><div class="t m0 x1 h3 y3 ff1 fs1 fc0 sc0 ls0 ws0">J.<span class="_ _2"> </span>Kalp<span class="_ _0"></span>an<span class="_ _0"></span>a<span class="_ _3"> </span><span class="ff2 fs2">&amp;<span class="_ _3"> </span></span>R.<span class="_ _3"> </span>Krish<span class="_ _0"></span>namo<span class="_ _0"></span>or<span class="_ _0"></span>thi</div><div class="t m0 x1 h4 y4 ff3 fs2 fc0 sc0 ls0 ws0">Rece<span class="_ _0"></span>iv<span class="_ _0"></span>ed<span class="_ _0"></span>:<span class="_ _3"> </span>27<span class="_ _4"> </span>Dec<span class="_ _0"></span>em<span class="_ _0"></span>ber<span class="_ _4"> </span>2013<span class="_ _5"> </span>/<span class="_ _6"> </span>Revi<span class="_ _0"></span>sed<span class="_ _0"></span>:<span class="_ _4"> </span>31<span class="_ _4"> </span>Augu<span class="_ _0"></span>st<span class="_ _4"> </span>201<span class="_ _0"></span>4<span class="_ _4"> </span>/<span class="_ _6"></span>A<span class="_ _0"></span>cc<span class="_ _0"></span>ept<span class="_ _0"></span>ed:<span class="_ _4"> </span>3<span class="_ _4"> </span>Septem<span class="_ _0"></span>b<span class="_ _0"></span>er<span class="_ _4"> </span>2014<span class="_ _5"> </span>/</div><div class="t m0 x1 h4 y5 ff3 fs2 fc0 sc0 ls0 ws0">Pub<span class="_ _0"></span>lis<span class="_ _0"></span>hed<span class="_ _4"> </span>on<span class="_ _0"></span>lin<span class="_ _0"></span>e:<span class="_ _4"> </span>2<span class="_ _4"> </span>Decem<span class="_ _0"></span>ber<span class="_ _4"> </span>201<span class="_ _0"></span>4</div><div class="t m0 x1 h5 y6 ff4 fs2 fc0 sc0 ls0 ws0">#</div><div class="t m0 x2 h4 y7 ff3 fs2 fc0 sc0 ls0 ws0">Spri<span class="_ _0"></span>nge<span class="_ _0"></span>r<span class="_ _4"> </span>Sci<span class="_ _0"></span>ence<span class="_ _0"></span>+B<span class="_ _0"></span>us<span class="_ _0"></span>ines<span class="_ _0"></span>s<span class="_ _4"> </span>Med<span class="_ _0"></span>ia<span class="_ _4"> </span>New<span class="_ _4"> </span>Y<span class="_ _7"></span>or<span class="_ _0"></span>k<span class="_ _3"> </span>201<span class="_ _0"></span>4</div><div class="t m0 x1 h6 y8 ff1 fs1 fc0 sc0 ls0 ws0">Abs<span class="_ _0"></span>trac<span class="_ _0"></span>t<span class="_ _8"> </span><span class="ff3">In<span class="_ _3"> </span>this<span class="_ _3"> </span>pape<span class="_ _0"></span>r<span class="_ _0"></span>,<span class="_ _3"> </span>a<span class="_ _2"> </span>new<span class="_ _3"> </span>color<span class="_ _3"> </span>imag<span class="_ _0"></span>e<span class="_ _2"> </span>ret<span class="_ _0"></span>rie<span class="_ _0"></span>val<span class="_ _3"> </span>tech<span class="_ _0"></span>ni<span class="_ _0"></span>que<span class="_ _3"> </span>is<span class="_ _3"> </span>propos<span class="_ _0"></span>ed<span class="_ _3"> </span>with<span class="_ _3"> </span>loca<span class="_ _0"></span>l<span class="_ _2"> </span>fea<span class="_ _0"></span>tu<span class="_ _0"></span>res</span></div><div class="t m0 x1 h6 y9 ff3 fs1 fc0 sc0 ls0 ws0">give<span class="_ _0"></span>n<span class="_ _4"> </span>by<span class="_ _4"> </span>Sca<span class="_ _0"></span>le<span class="_ _4"> </span>In<span class="_ _0"></span>vari<span class="_ _0"></span>ant<span class="_ _4"> </span>Fe<span class="_ _0"></span>atu<span class="_ _0"></span>re<span class="_ _4"> </span>T<span class="_ _7"></span>ransfo<span class="_ _0"></span>rm<span class="_ _4"> </span>(S<span class="_ _0"></span>IFT)<span class="_ _4"> </span>ke<span class="_ _0"></span>y<span class="_ _4"> </span>poi<span class="_ _0"></span>nts<span class="_ _4"> </span>th<span class="_ _0"></span>at<span class="_ _4"> </span>are<span class="_ _4"> </span>d<span class="_ _0"></span>esc<span class="_ _0"></span>ribe<span class="_ _0"></span>d<span class="_ _4"> </span>in<span class="_ _4"> </span>the<span class="_ _4"> </span>in<span class="_ _0"></span>tege<span class="_ _0"></span>r<span class="_ _0"></span>-</div><div class="t m0 x1 h6 ya ff3 fs1 fc0 sc0 ls0 ws0">nat<span class="_ _0"></span>ure<span class="_ _0"></span>d,<span class="_ _2"> </span>comp<span class="_ _0"></span>uta<span class="_ _0"></span>ti<span class="_ _0"></span>onal<span class="_ _0"></span>ly<span class="_ _3"> </span>light<span class="_ _2"> </span>Ort<span class="_ _0"></span>hogo<span class="_ _0"></span>nal<span class="_ _3"> </span>Poly<span class="_ _0"></span>nomi<span class="_ _0"></span>als<span class="_ _3"> </span>T<span class="_ _0"></span>ran<span class="_ _0"></span>sfor<span class="_ _0"></span>m<span class="_ _2"> </span>(OPT<span class="_ _0"></span>)<span class="_ _2"> </span>domai<span class="_ _0"></span>n.<span class="_ _2"> </span>The<span class="_ _3"> </span>trans-</div><div class="t m0 x1 h6 yb ff3 fs1 fc0 sc0 ls0 ws0">form<span class="_ _0"></span><span class="ff5">&#8217;<span class="_ _7"></span><span class="ff3">s<span class="_ _9"> </span>poi<span class="_ _0"></span>nt<span class="_ _9"> </span>sp<span class="_ _0"></span>rea<span class="_ _0"></span>d<span class="_ _9"> </span>ope<span class="_ _0"></span>ra<span class="_ _0"></span>tors<span class="_ _2"> </span>are<span class="_ _9"> </span>deri<span class="_ _0"></span>ve<span class="_ _0"></span>d<span class="_ _9"> </span>fr<span class="_ _0"></span>om<span class="_ _9"> </span>a<span class="_ _9"> </span>ge<span class="_ _0"></span>nera<span class="_ _0"></span>ti<span class="_ _0"></span>ng<span class="_ _9"> </span>fu<span class="_ _0"></span>nc<span class="_ _0"></span>tio<span class="_ _0"></span>n,<span class="_ _9"> </span>mo<span class="_ _0"></span>difi<span class="_ _0"></span>ca<span class="_ _0"></span>tion<span class="_ _2"> </span>to<span class="_ _9"> </span>whi<span class="_ _0"></span>ch</span></span></div><div class="t m0 x1 h6 yc ff3 fs1 fc0 sc0 ls0 ws0">has<span class="_ _3"> </span>been<span class="_ _3"> </span>propo<span class="_ _0"></span>se<span class="_ _0"></span>d<span class="_ _2"> </span>for<span class="_ _3"> </span>alle<span class="_ _0"></span>via<span class="_ _0"></span>ting<span class="_ _3"> </span>com<span class="_ _0"></span>puta<span class="_ _0"></span>tio<span class="_ _0"></span>na<span class="_ _0"></span>l<span class="_ _2"> </span>co<span class="_ _0"></span>mpl<span class="_ _0"></span>exit<span class="_ _0"></span>y<span class="_ _2"> </span>fu<span class="_ _0"></span>rthe<span class="_ _0"></span>r<span class="_ _7"></span>.<span class="_ _2"> </span>The<span class="_ _3"> </span>expre<span class="_ _0"></span>ssi<span class="_ _0"></span>ve<span class="_ _3"> </span>power<span class="_ _3"> </span>of</div><div class="t m0 x1 h6 yd ff3 fs1 fc0 sc0 ls0 ws0">the<span class="_ _4"> </span>tra<span class="_ _0"></span>nsf<span class="_ _0"></span>orm<span class="_ _4"> </span>coe<span class="_ _0"></span>ffi<span class="_ _0"></span>c<span class="_ _0"></span>ient<span class="_ _0"></span>s<span class="_ _4"> </span>has<span class="_ _4"> </span>bee<span class="_ _0"></span>n<span class="_ _4"> </span>exploi<span class="_ _0"></span>te<span class="_ _0"></span>d<span class="_ _4"> </span>for<span class="_ _4"> </span>formin<span class="_ _0"></span>g<span class="_ _4"> </span>the<span class="_ _4"> </span>desc<span class="_ _0"></span>ri<span class="_ _0"></span>ptor<span class="_ _0"></span>s<span class="_ _4"> </span>of<span class="_ _4"> </span>SIFT<span class="_ _4"> </span>key<span class="_ _4"> </span>poi<span class="_ _0"></span>nts<span class="_ _4"> </span>of</div><div class="t m0 x1 h6 ye ff3 fs1 fc0 sc0 ls0 ws0">a<span class="_ _2"> </span>giv<span class="_ _0"></span>en<span class="_ _2"> </span>ima<span class="_ _0"></span>ge.<span class="_ _3"> </span>The<span class="_ _2"> </span>key<span class="_ _3"> </span>poin<span class="_ _0"></span>t<span class="_ _2"> </span>desc<span class="_ _0"></span>ri<span class="_ _0"></span>ptor<span class="_ _0"></span>s,<span class="_ _3"> </span>OPT<span class="_ _7"></span>-S<span class="_ _0"></span>IF<span class="_ _0"></span>T<span class="_ _4"> </span>so<span class="_ _3"> </span>forme<span class="_ _0"></span>d<span class="_ _2"> </span>have<span class="_ _3"> </span>good<span class="_ _3"> </span>expre<span class="_ _0"></span>ssi<span class="_ _0"></span>ve<span class="_ _3"> </span>powe<span class="_ _0"></span>r<span class="_ _0"></span>,</div><div class="t m0 x1 h6 yf ff3 fs1 fc0 sc0 ls0 ws0">des<span class="_ _0"></span>pit<span class="_ _0"></span>e<span class="_ _a"> </span>bei<span class="_ _0"></span>ng<span class="_ _9"> </span>short<span class="_ _0"></span>er<span class="_ _9"> </span>in<span class="_ _9"> </span>lengt<span class="_ _0"></span>h<span class="_ _a"> </span>and<span class="_ _9"> </span>havi<span class="_ _0"></span>ng<span class="_ _9"> </span>a<span class="_ _a"> </span>redu<span class="_ _0"></span>ced<span class="_ _9"> </span>compu<span class="_ _0"></span>ta<span class="_ _0"></span>tio<span class="_ _0"></span>na<span class="_ _0"></span>l<span class="_ _a"> </span>comp<span class="_ _0"></span>le<span class="_ _0"></span>xit<span class="_ _0"></span>y<span class="_ _7"></span>.<span class="_ _a"> </span>A<span class="_ _a"> </span>ret<span class="_ _0"></span>rie<span class="_ _0"></span>val</div><div class="t m0 x1 h6 y10 ff3 fs1 fc0 sc0 ls0 ws0">tec<span class="_ _0"></span>hniq<span class="_ _0"></span>ue<span class="_ _2"> </span>has<span class="_ _2"> </span>been<span class="_ _2"> </span>propose<span class="_ _0"></span>d<span class="_ _2"> </span>based<span class="_ _2"> </span>on<span class="_ _9"> </span>OP<span class="_ _0"></span>T<span class="_ _7"></span>-S<span class="_ _0"></span>IF<span class="_ _0"></span>T<span class="_ _9"> </span>fe<span class="_ _0"></span>atur<span class="_ _0"></span>es.<span class="_ _2"> </span>The<span class="_ _2"> </span>prop<span class="_ _0"></span>osed<span class="_ _2"> </span>retr<span class="_ _0"></span>ieva<span class="_ _0"></span>l<span class="_ _2"> </span>techn<span class="_ _0"></span>ique</div><div class="t m0 x1 h6 y11 ff3 fs1 fc0 sc0 ls0 ws0">has<span class="_ _b"> </span>bee<span class="_ _0"></span>n<span class="_ _b"> </span>exper<span class="_ _0"></span>ime<span class="_ _0"></span>nt<span class="_ _0"></span>ed<span class="_ _b"> </span>with<span class="_ _b"> </span>ima<span class="_ _0"></span>ges<span class="_ _b"> </span>from<span class="_ _5"> </span>stand<span class="_ _0"></span>ard<span class="_ _5"> </span>databa<span class="_ _0"></span>se<span class="_ _0"></span>s<span class="_ _b"> </span>such<span class="_ _b"> </span>COIL-<span class="_ _0"></span>10<span class="_ _0"></span>0<span class="_ _b"> </span>and<span class="_ _b"> </span>Core<span class="_ _0"></span>l<span class="_ _b"> </span>and<span class="_ _b"> </span>the</div><div class="t m0 x1 h6 y12 ff3 fs1 fc0 sc0 ls0 ws0">results<span class="_ _c"> </span>demonstrate<span class="_ _c"> </span>the<span class="_ _c"> </span>superio<span class="_ _0"></span>rity<span class="_ _c"> </span>of<span class="_ _c"> </span>the<span class="_ _d"> </span>proposed<span class="_ _c"> </span>descripto<span class="_ _0"></span>rs<span class="_ _c"> </span>when<span class="_ _c"> </span>compared<span class="_ _c"> </span>to<span class="_ _c"> </span>other</div><div class="t m0 x1 h6 y13 ff3 fs1 fc0 sc0 ls0 ws0">des<span class="_ _0"></span>cri<span class="_ _0"></span>ptor<span class="_ _0"></span>s.</div><div class="t m0 x1 h6 y14 ff1 fs1 fc0 sc0 ls0 ws0">Keyw<span class="_ _0"></span>or<span class="_ _0"></span>ds<span class="_ _e"> </span><span class="ff3 ls1">Content<span class="_ _b"> </span>bas<span class="_ _f"></span>ed<span class="_ _5"> </span>i<span class="_ _f"></span>mage<span class="_ _b"> </span>retriev<span class="_ _f"></span>al<span class="_ _5"> </span>(<span class="_ _f"></span>CBIR)</span></div><div class="t m0 x3 h6 y15 ff3 fs1 fc0 sc0 ls0 ws0">.</div><div class="t m0 x4 h6 y14 ff3 fs1 fc0 sc0 ls0 ws0">Dime<span class="_ _0"></span>ns<span class="_ _0"></span>iona<span class="_ _0"></span>li<span class="_ _0"></span>ty<span class="_ _5"> </span>redu<span class="_ _0"></span>ct<span class="_ _0"></span>ion</div><div class="t m0 x5 h6 y15 ff3 fs1 fc0 sc0 ls0 ws0">.</div><div class="t m0 x6 h6 y14 ff3 fs1 fc0 sc0 ls0 ws0">Ort<span class="_ _0"></span>hog<span class="_ _0"></span>ona<span class="_ _0"></span>l</div><div class="t m0 x1 h6 y16 ff3 fs1 fc0 sc0 ls0 ws0">poly<span class="_ _0"></span>no<span class="_ _0"></span>mia<span class="_ _0"></span>ls</div><div class="t m0 x7 h6 y17 ff3 fs1 fc0 sc0 ls0 ws0">.</div><div class="t m0 x8 h6 y16 ff3 fs1 fc0 sc0 ls0 ws0">SIF<span class="_ _0"></span>T<span class="_ _5"> </span>keyp<span class="_ _0"></span>oin<span class="_ _0"></span>t<span class="_ _5"> </span>desc<span class="_ _0"></span>ript<span class="_ _0"></span>or<span class="_ _0"></span>s</div><div class="t m0 x1 h3 y18 ff1 fs1 fc0 sc0 ls0 ws0">1<span class="_ _2"> </span>Intr<span class="_ _0"></span>od<span class="_ _0"></span>ucti<span class="_ _0"></span>o<span class="_ _0"></span>n</div><div class="t m0 x1 h6 y19 ff3 fs1 fc0 sc0 ls2 ws0">Several<span class="_ _4"> </span>Content<span class="_ _4"> </span>Based<span class="_ _4"> </span>Image<span class="_ _4"> </span>Retrieval<span class="_ _4"> </span>(CBIR)<span class="_ _4"> </span>t<span class="ls3">echniques<span class="_ _4"> </span>h<span class="_ _f"></span>ave<span class="_ _4"> </span>been<span class="_ _4"> </span>proposed<span class="_ _4"> </span>based<span class="_ _4"> </span>on<span class="_ _4"> </span>various</span></div><div class="t m0 x1 h6 y1a ff3 fs1 fc0 sc0 ls4 ws0">global<span class="_ _2"> </span>and<span class="_ _9"> </span>local<span class="_ _9"> </span>low<span class="_ _2"> </span>level<span class="_ _9"> </span>features.<span class="_ _2"> </span>Ritendra<span class="_ _9"> </span>[<span class="fc1 ls5">29</span><span class="ls6">]<span class="_ _9"> </span>report<span class="_ _9"> </span>that<span class="_ _2"> </span>the<span class="_ _9"> </span>trends<span class="_ _9"> </span>of<span class="_ _9"> </span>CBIR<span class="_ _2"> </span>res<span class="_ _f"></span>earch<span class="_ _9"> </span>have</span></div><div class="t m0 x1 h6 y1b ff3 fs1 fc0 sc0 ls7 ws0">switched<span class="_ _a"> </span>from<span class="_ _a"> </span>global<span class="_ _a"> </span>features<span class="_ _a"> </span>to<span class="_ _a"> </span>local<span class="_ _a"> </span>features,<span class="_ _a"> </span>which<span class="_ _1"> </span>is<span class="_ _9"> </span>proved<span class="_ _1"> </span>as<span class="_ _a"> </span>a<span class="_ _a"> </span>practical<span class="_ _a"> </span>way<span class="_ _a"> </span>to<span class="_ _a"> </span>handle</div><div class="t m0 x1 h7 y1c ff5 fs1 fc0 sc0 ls0 ws0">&#8220;<span class="ff3 ls2">semantic<span class="_ _2"> </span>gap</span>&#8221;<span class="ff3 ls8">.<span class="_ _9"> </span>Local<span class="_ _2"> </span>features<span class="_ _9"> </span>are<span class="_ _9"> </span>more<span class="_ _2"> </span>reliabl<span class="_ _f"></span>e<span class="_ _2"> </span>f<span class="_ _f"></span>or<span class="_ _9"> </span>several<span class="_ _2"> </span>reasons:<span class="_ _9"> </span></span><span class="ff6">&#8722;<span class="_ _9"> </span><span class="ff3 ls9">they<span class="_ _2"> </span>isolate<span class="_ _9"> </span>occlusions,</span></span></div><div class="t m0 x1 h6 y1d ff3 fs1 fc0 sc0 ls0 ws0">isola<span class="_ _f"></span>te<span class="_ _c"> </span>cl<span class="_ _f"></span>utter<span class="_ _d"> </span>and<span class="_ _d"> </span>the<span class="_ _d"> </span>backgr<span class="_ _f"></span>ound<span class="_ _d"> </span>and<span class="_ _c"> </span>al<span class="_ _f"></span>so<span class="_ _d"> </span>accommo<span class="_ _f"></span>date<span class="_ _d"> </span>parti<span class="_ _f"></span>al<span class="_ _d"> </span>appear<span class="_ _f"></span>ance<span class="_ _d"> </span>varia<span class="_ _f"></span>tion.</div><div class="t m0 x1 h6 y1e ff3 fs1 fc0 sc0 lsa ws0">Mikolajczyk<span class="_ _9"> </span>et<span class="_ _9"> </span>al.<span class="_ _9"> </span>in<span class="_ _a"> </span>[<span class="fc1 ls5">26</span><span class="ls2">]<span class="_ _9"> </span>report<span class="_ _9"> </span>that<span class="_ _a"> </span>the<span class="_ _9"> </span>method<span class="_ _9"> </span>used<span class="_ _a"> </span>for<span class="_ _9"> </span>local<span class="_ _9"> </span>feature<span class="_ _a"> </span>identification<span class="_ _9"> </span>does<span class="_ _9"> </span>n<span class="_ _f"></span>ot</span></div><div class="t m0 x1 h6 y1f ff3 fs1 fc0 sc0 lsb ws0">affect<span class="_ _b"> </span>the<span class="_ _b"> </span>method<span class="_ _4"> </span>employed<span class="_ _b"> </span>to<span class="_ _4"> </span>describe<span class="_ _b"> </span>the<span class="_ _4"> </span>local<span class="_ _4"> </span>f<span class="lsc">eatures.<span class="_ _b"> </span>They<span class="_ _4"> </span>also<span class="_ _b"> </span>conclude<span class="_ _4"> </span>that<span class="_ _4"> </span>the<span class="_ _b"> </span>description</span></div><div class="t m0 x1 h6 y20 ff3 fs1 fc0 sc0 lsd ws0">of<span class="_ _9"> </span>the<span class="_ _9"> </span>local<span class="_ _9"> </span>features<span class="_ _9"> </span>depends<span class="_ _9"> </span>much<span class="_ _9"> </span>on<span class="_ _9"> </span>the<span class="_ _2"> </span>rep<span class="_ _f"></span>re<span class="ls9">sentation<span class="_ _9"> </span>used<span class="_ _9"> </span>to<span class="_ _2"> </span>model<span class="_ _9"> </span>image<span class="_ _9"> </span>patches<span class="_ _9"> </span>around</span></div><div class="t m0 x1 h6 y21 ff3 fs1 fc0 sc0 lse ws0">interest<span class="_ _9"> </span>points.<span class="_ _a"> </span>This<span class="_ _a"> </span>report<span class="_ _9"> </span>gives<span class="_ _a"> </span>scope<span class="_ _a"> </span>for<span class="_ _a"> </span>two<span class="_ _9"> </span><span class="lsf">independent<span class="_ _a"> </span>processes<span class="_ _a"> </span>-<span class="_ _9"> </span>identification<span class="_ _a"> </span>of<span class="_ _a"> </span>local</span></div><div class="t m0 x1 h6 y22 ff3 fs1 fc0 sc0 ls4 ws0">features<span class="_ _3"> </span>and<span class="_ _2"> </span>description<span class="_ _3"> </span>of<span class="_ _2"> </span>the<span class="_ _2"> </span>identified<span class="_ _3"> </span>local<span class="_ _2"> </span>features.</div><div class="t m0 x1 h4 y23 ff3 fs2 fc0 sc0 ls0 ws0">Mul<span class="_ _0"></span>ti<span class="_ _0"></span>med<span class="_ _4"> </span>T<span class="_ _7"></span>ools<span class="_ _4"> </span>App<span class="_ _0"></span>l<span class="_ _4"> </span>(2016<span class="_ _0"></span>)<span class="_ _4"> </span>75:4<span class="_ _0"></span>9<span class="ff5">&#8211;</span><span class="ls10">69</span></div><div class="t m0 x1 h4 y24 ff3 fs2 fc0 sc0 ls0 ws0">DOI<span class="_ _4"> </span>10.1<span class="_ _0"></span>0<span class="_ _0"></span>07/<span class="_ _0"></span>s1<span class="_ _7"></span>1042-<span class="_ _0"></span>01<span class="_ _0"></span>4-2<span class="_ _0"></span>262<span class="_ _0"></span>-1</div><div class="t m0 x1 h8 y25 ff3 fs2 fc0 sc0 ls11 ws0">J.<span class="_ _3"> </span>Kalpan<span class="_ _f"></span>a<span class="_ _b"> </span>(<span class="ff7 ls0">*<span class="ff3">)</span></span></div><div class="t m0 x9 h9 y26 ff8 fs3 fc0 sc0 ls0 ws0">:</div><div class="t m0 xa h4 y25 ff3 fs2 fc0 sc0 ls0 ws0">R.<span class="_ _4"> </span>Kris<span class="_ _0"></span>hna<span class="_ _0"></span>mo<span class="_ _0"></span>ort<span class="_ _0"></span>hi</div><div class="t m0 x1 h4 y27 ff3 fs2 fc0 sc0 ls0 ws0">Ima<span class="_ _0"></span>ge<span class="_ _4"> </span>V<span class="_ _7"></span>ision<span class="_ _4"> </span>Labo<span class="_ _0"></span>rat<span class="_ _0"></span>or<span class="_ _0"></span>y<span class="_ _7"></span>,<span class="_ _4"> </span>Dept.<span class="_ _4"> </span>of<span class="_ _4"> </span>CSE,<span class="_ _b"> </span>Anna<span class="_ _4"> </span>Unive<span class="_ _0"></span>rs<span class="_ _0"></span>it<span class="_ _0"></span>y<span class="_ _4"> </span>of<span class="_ _3"> </span>T<span class="_ _7"></span>echn<span class="_ _0"></span>olo<span class="_ _0"></span>gy<span class="_ _7"></span>,<span class="_ _4"> </span>Ti<span class="_ _0"></span>ruc<span class="_ _0"></span>hira<span class="_ _0"></span>p<span class="_ _0"></span>all<span class="_ _0"></span>i<span class="_ _4"> </span>620<span class="_ _4"> </span>024,<span class="_ _4"> 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