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1、上海交通大学硕士学位论文图像传感器中图像处理技术的算法改进及其硬件实现姓名：赵大猷申请学位级别：硕士专业：@指导教师：郭炜20070118上海交通大学硕士论文ALGORITHMIMPROVEMENTANDHARDWAREIMPLEMENTATIONOFIMAGEPROCESSTECHNOLOGYINIMAGESENSORABSTRACTTheimagesensorchipsaregraduallywidelyusedinmanyfields,likecommunication,security,medica
2、ltreatment,andentertainment.Asthecorevisualcomponent,imagesensorhasanexpansivemarketdemand.Imagesensorhasspecialrequirementinimageprocessing,whichaimstogettheoptimalvisualeffect.Thenoiseintheimagewhichgeneratedbyimagesensor,willaffectthequalityofimagenegat
3、ively.Itneedssomeeffectivenoisereductionalgorithmtooptimizetheimagecontaminatedbynoise.Thetraditionalfilteringalgorithmsdon’thavesatisfiedperformanceforhybridnoise,andit’sdifficulttoimplementsomerecentlyproposedalgorithmswithgoodimageprocessingeffectinhard
4、ware.Inthisthesis,atfirstahybridnoisemodelisdescribed.Thenanewmethodofdistinguishingnoiseandimageedgeisproposed.Accordingtothismethod,apattern-basedadaptivehybridfilterisdesigned,whichiseasyforhardwareimplementation.AndCIE94colordifferenceformulae,whichcan
5、moreveritablyreflecthumanvisualsense,isadoptedasthecriterionofimageprocessingeffectcomparison.ThesimulationresultshowstheproposedalgorithmhasverygoodperformanceinthehybridnoisereductionwithGaussiannoiseandpepperandsaltnoise.Andthehardwareimplementationandv
6、erificationarealsopresented.Theresultofsoftwaresimulationshowstheeffectivityofproposedalgorithm.Andtheresultofhardwareimplementationindicatestheproposedalgorithmcanbeeasilyintegratedinimageprocessingchipofimagesensor,andmeettherealtimerequirement.KEYWORDS:
7、imagesensor,noisereduction,adaptivehybridfilter,hardwareimplementation–2–上海交通大学硕士论文图片目录图1图像传感器应用领域·······················································································2图2图像传感器芯片的功能模块图·······················································
8、················6图3传感器图像处理的总体流程···········································································7图4图像传感器图像采集前处理的结构图···························································8图5自动曝光的主要操作············
