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《基于改進正則算子的氣動模糊圖像復原研究》由會員上傳分享，免費在線閱讀，更多相關內(nèi)容在學術論文-天天文庫。
1、第26卷第4期計算機應用研究Vo126No．42009年4月ApplicationResearchofComputersApr．2009基于改進正則算子的氣動模糊圖像復原研究水楊文霞。，蔡超，丁明躍，周成平(1．華中科技大學圖像識別與人工智能研究所多譜段信息處理及其應用國防重點實驗室，武漢430074；2．武漢理工大學理學院數(shù)學系，武漢430070)摘要：針對氣動光學效應所產(chǎn)生的紅外圖像模糊和偏移問題，首先對電弧風洞得到的吹風紅外實驗圖片，計算其中的像偏移，得出像偏移主要是在迎風方向這一結(jié)論。通過將氣動
2、光學效應傳遞函數(shù)應用于吹風前圖像，并將得到的圖像與實驗實測的模糊圖像對比，驗證了理論點擴散函數(shù)的正確性。最后，提出了一種改進的氣動光學圖像復原方法。該方法采取基于演化算法，將理論計算的點擴散函數(shù)作為基本正則算子參與演化，從而得到最佳正則算子和最佳圖像復原參數(shù)。實驗結(jié)果證明了該復原算法的有效性。關鍵詞：圖像復原；氣動光學效應；風洞實驗；正則算子；演化算法中圖分類號：TP751文獻標志碼：A文章編號：1001．3695(2009)04—1584。04Researchonrestorationofaero—o
3、pticdistortedinfraredimagesbasedonimprovedregularoperatorYANGWen-xia，CAIChao，DINGMing—yue，ZHOUCheng．ping(1．Multi—spectralImageInformationProcessingKeyLaboratoryofNationalDefense，InstituteofPaternRecognition＆An6％ialIntelligence．HuazhongUniversityofScience
4、&Technology，Wuhan430074，China；2．Dept．ofMathematics，SchoolofTechnology，WuhanUniversityofTechnology，Wuhan430070，China)Abstract：Aero·opticeffectscauseblurring，vibration，deformationandspatialshiftingoftheobjectsintheimageobtainedbytheinfraredsensor．Thecontri
5、butionsofthispaperwereinthefollowingthreeaspects．First，calculatedspatialshiftingoftheobjectsfromtheexperimentalimagesandobtainedthemaximumoffsetangle，whichshowedthattheshiftingWaSinthesame．directionofthewind．Second，validatedcorrectnessofthetheoreticalpoi
6、ntspectrumfunction(PSF)derivedintheformerre—searchtorepresenttheaero—opticeffects．Furthermore，appliedthePSFtotheoriginalimage，andcomparedtherestoredim-agewiththeblurredimageacquiredintheexperiment．Finally，developedanimprovedalgorithmforrestorationofthein
7、fraredimagedistortedbytheaero—opticeffects．Specifically，employedevolutionaryprogramming(EP)tosolvethisadaptiveregular-izationproblembytakingthePSFasabasicregularizationoperator，andbyconstructinganoptimizationmodelwhichmini—mizedthemeansquaresresidueofthe
8、regularizedsolution，fromwhichdeterminedtheregularizationparameters．Experimentsdemonstratethefeasibilityoftheproposedmethod．Keywords：imagerestoration；aero—opticeffects；windchannelexperiment；regularizationoperator；evolutiona
