Image Organization and Retrieval Using a Flexible Shape Model

I.IL content-bused ceccess of %muge dutubuses, there i s ii . r eed f o r U shupe for r r iu l ism that ul1o.w.s u prccise dcipt ion u,rd r.ecoqrLitao.rc of u wider class of shupe vuriut%o,rt.s that e t~oke the surne o~ver.cill ye.r.ceptuul s.i~r~iluri t y ire appeurunce. S u c h u descripkion ,rcot o,rcly ullows i,rreuges o,f U dotubuse to be o r y " l into shupe cate,yories f o r e,fficierit indexing, but ulso veukes U wider class of shupe-sarrdurity queries possible. This puper construined u.firie shape model: that cupkcires the spuk i d loyout . s i r r d w i t y betwecrt rrwrrcbers of (I cluss by U set of co.rr.struined u f i r c e de,for."ores from U prot o h ~ p i c e l " x b e r . The shupe mode l i s p ~ o p o s e d for use in orgurrizin,g irnuges of u dotubuse into shccpe cutegories represerhted by prototypicul members und the ussociuted shape co,ri.st.r.uints. A n e,&cie.rit mutching ul,yolrthm is prese.rited f o r use in slcupe cuteqorizution wed queyyin,q. Efl'ect of globul pose changes o'r~ the cons tmin ts of the shupe model u're urcul;yzed t o . I I L U ~ C shupe . " W i n g robust to ylobul pose chenges. A n upylicution of the rnodel for docu,rrLe,rbt retricvul bused o n document shupe g e " w is presented. F i d l y , the effectiveness of the shupe ,model i r c content-bused access of such dutubuses is ewuluated.