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《基于統(tǒng)計形狀模型的肝臟圖像分割算法分析-(5727)》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、碩士學位論文價函數(shù)，通過學習而得的各參數(shù)可以更好的指導(dǎo)匹配過程的形狀擬合。同時降低了分割過程中搜索函數(shù)的復(fù)雜度，提高了分割的速度。本文采用的基于統(tǒng)計形狀模型的灰度模型通過區(qū)域特征從總體上識別肝臟組織，又在邊緣信息上優(yōu)化細節(jié)。實驗結(jié)果表明該方法能夠提高分割的精度和穩(wěn)定性。關(guān)鍵字：統(tǒng)計形狀模型，灰度外觀模型，邊緣特征，區(qū)域特征，學習的代價函數(shù)V碩士學位論文RESEARCHOFLIVERIMAGESEGMENTATIoNBASEDoNSTATISTICALSHAPEMODELSName：LiChunLiSupervisor：Prof．FengQian
2、jinABSTRACTMedicalimagesegmentationisthetechniquethatdividestheimageintodifferentregionswhichtheinter-regionshavedifferentcharacteristicsandtheintra-regionissimilar,orextractstheinterestedobjectsfromtheimage．Thesegmentationtakesanimportantroleinthefieldofmedicalimageprocessi
3、ngandanalyzing．HoweveLmedicalimagesegmentationisputmoreemphasisontheextractingspecialregions，suchasorgansorcancers．Asthesametime，thedifferentregionsorobjectsshouldbeidentitywitlltheanatomicalstructure．Basedonmedicalimagesegmentation，theimagecontentsCanbebeReranalyzed，whichwi
4、llassistdoctorstodiagnoseandmakethetreatmentplancorrectly．Uptonow,therearelotsofsegmentationmethodsforallkindsofpurposes，butnooneCangenerallyapplytodifferentmodesofimagesanddifferentorgans．Moreover,Thereareflnumberoffactorsthatcausecurrentsegmentationalgorithmsfailtosatisfyt
5、heneedofclinicalpractice，includingtheindividualdifferencesinthetissueanatomy；slowcalculatingspeedandinaccuracy；andpoorimagequalityaffectedbynoise，intensiveinhomogeneityandpartialvolumeeffect(PVE)etc．Inaddition，itisdifficulttodescribethepracticalproblemcompletelyusingmathemat
6、icalmodels；thedissimilarityofthesegmentationobjectives；imagedegradationandSOon．Thereisnosuchanalgorithmofsegmentationwhichiscompetentforallkindsoftheproblems．SoweonlycantakethegivenproblemsandthespecialrequiresintoaccounttodevelopdifferentABSTRACTalgorithms，andbalancebetween
7、theprecision，thespeedandtherobustness．Forthesereasons，themedicalimagesegmentationhasbeenanimportantfieldinmedicalimageprocessingandanalysis．Theliveristhelargestglandinthebody(approximately1500grams)whichisvitalorgan．Ithasawiderangeoffunctions，includingdetoxification，excretio
8、n，bloodstorage，proteinsynthesis，andproductionofbiochemicalsnecessaryfordige
