A Bayesian Similarity Measure for Deformable Image Matching, Image and Vision Computing

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MITSUBISHIELECTRICRESEARCHLABORATORIES
http://www.merl.com

ABayesianSimilarityMeasurefor
DeformableImageMatching

BabackMoghaddam
ChahabNastar
AlexPentland

TR2001-52February2002

Abstract
Weproposeaprobabilisticsimilaritymeasurefordirectimagematchingbasedona
Bayesiananalysisofimagedeformations.Wemodeltwoclassesofvariationinobject
appearance:intra-objectandextra-object.Theprobabilitydensityfunctionsforeach
classarethenestimatedfromtrainingdataandusedtocomputeasimilaritymeasure
basedontheaposterioriprobabilities.Furthermore,weuseanovelrepresentation
forcharacterizingimagedifferencesusingadeformabletechniqueforobtainingpixel-
wisecorrespondences.Thisrepresentation,whichisbasedonadeformable3Dmesh
inXYI-space,isthenexperimentallycomparedwithtwosimplerrepresentations:in-
tensitydifferencesandopticalflow.Theperformanceadvantageofourdeformable
matchingtechniqueisdemonstratedusingatypicallyhardtestsetdrawnfromtheUS
Army’sFERETfacedatabase.

Appearsin:Image&VisionComputing,Vol.19,pps.235-244,2001.

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CopyrightcMitsubishiElectricResearchLaboratories,Inc.,2002
201Broadway,Cambridge,Massachusetts02139
Appearsin:Image&VisionComputing,Vol.19,pps.235-244,2001.
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