利用图像数字化处理研究天然采光系数

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1、⑩天摩大摹T『ANJlNUNIVERSlTY博士学位论文一级学科：建篁生学科专业：建笪蕉苤叠堂作者姓名：韭血红指导教师：选玉短塾攫天津大学研究生院2005年7月Witlltheimprovementofpeople’slivingstandard．moreandmorepeoplecometopaymuchattentiontotherequirementfornatul锄lightinbuildings．Recently,researchhasbeenconductedallovertheworldontheuseandapplicationoft

2、hedaylightfactormethodtOdeterminenaturallightinbuilding．Adaylightfactorisdefinedastheratioofinteriorilluminaneeonahorizontalsurfacetotheexteriorilluminanceonahorizontalsurfacesimultaneouslyavailableoutdoorsfromanovercastsky．Traditionalilluminanceapparatuscannotsatisfyrequiremen

3、ttoevaluatedaylightenvironmentsynthetically．UsuallythereistimedifferencebetweeninteriorilluminanceandexteriorilluminancewhichleadstounnecessaryelTOrSintesting．Theilluminanceapparatuscanonlybeusedintheovercastsky,butinothersconditions，especially、析maclearsky,thedaylightfactorwill

4、beaffectedbythechangingdaylight．Sincetheilluminanceapparatuscannoteffectivelyanalyzecomponentsofthedaylightfactor,thereisagreatlimitationontestingandstudyingthedaylightfactor．Therefore，thisessaymainlyemphasizesdigitalizationofpictureprocessingmethodtotestthedaylightfactor．Herei

5、stheresearchonthefollowingaspects：1．Thecombinationofdigitalizingpictureprocessingmethodwiththedaylightfactortheory．2．ThetestingdaylightfactorsystemsettingupbyusingdigitalcameracombinedwimdigitalizingpictureprocessingmethodCangetridoftheinfluencefromthechangingofskyconditionsand

6、getthedaylightfactorinthestandardluminanceoftheovercastskiestestedunderdifferentskyconditions．3．ThedaylightfactorbothbeforeandaftertheblockingCanbegotwhenwindowsareblockedbysomeexlernalobstruction．4．Intheclearsky,thedaylightfactorisvariousbecausethebuildingsfacedifferentlyandth

7、epositionoftheSunkeepschangingalldaylong．5．Analyzingallthecomponents(theskycomponent,theexternalreflectancecomponent，theinternalreflectancecomponent)，whichgiveinfluenceonnaturaldaylightfactor,andtlleiffunctions．Thatisalsocalledquantificationanalysisofaffectingcomponentsontheday

8、lightfactor．Developing‘‘thetestingprogramsystemofnatur