自然圖像摳圖方法的研究

1、廣東工業(yè)大學碩士學位論文自然圖像摳圖方法的研究姓名：呂巨建申請學位級別：碩士專業(yè)：信號與信息處理指導教師：戰(zhàn)蔭偉20090501廣東工業(yè)大學碩士學位論文AbstractThedigitalmattingisatechnologyofextractingaforegroundelementofarbitraryshapefromabackgroundimagebyestimatingacolorandopacityfortheforegr

2、oundelementateachpixelIthasbeenwidelyusedinimageprocessing，filmandvideoproduction，andvirtualrealityThebluescreenmattinganddifferencemattingaretheearlydigitalmattingtechnologybuttheyhavealargerestrictionItistherelianceona

3、controlledenvironmentorimagingscenariothatprovidesaknownpossiblyconstantcoloredbackgroundItbringstheinconvenientandlimitationoftheirapplicationsThenaturalimagemattingtechnologyhasnolimitationoftheimages，SOitisusedverycon

4、venientlyandattractsmoreandmoreattentionNaturalimagemattingapproachesrelyonuserguidanceandpriorassumptionsonimagestatisticstoestablishthemodelforsolvingthevaluesofalphamatte，andthenextracttheforegroundelementfromthebackg

5、roundHowtoestablishafastaccurateandeffectivemattingmodelisthefocusofnaturalimagemattingresearchInthispaperweresearchthenaturalimagemattingtechnologyandanalyzeandcomparetheprosandCOnsofseveralnaturalimagemattingalgorithms

6、Ourmaincontributionsareasfollows：1WestudyandanalyzeBayesianmattingwhichisbasedonBayesianframeworkThisalgorithmachievesabetterbalanceofspeedandeffectiveness，itisalsoabletoobtaingoodmattingresultswhentheimagehasacomplicate

7、dbackgroundButthisalgorithmdon’tproposethedefinitionofsmoothnessconstraintthusitusuallygeneratesimpulsenoisesintheresultedopacitychannelInthispaperwetrytoimprovetheBayesianmattingbyintroducingatermofsmoothnessconstrainti