基于动态序列图像的汽车碰撞分析系统的研究

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1、江苏大学硕士学位论文基于动态序列图像的汽车碰撞分析系统的研究姓名：张星申请学位级别：硕士专业：计算机应用技术指导教师：刘一松20090501江苏大学硕士学位论文析，得出了试验车车身位移数据和位移曲线，分析了汽车抗撞性能，验证了系统达到设计要求的可靠性和准确性。关键词：动态序列图像，图像复原，运动目标检测，摄像机模型，摄像机标定，图像测量，汽车碰撞Il江苏大学硕士学位论文ABSTRACTPassivesafetyofvehicleshasbecomethechiefperformancewhenthetrafficaccidentshav

2、ebecomeaglobalproblemwiththeincreaseofvehicles．Recentlytherearethreewaystostudythepassivesafety：theoreticalcalculations，testingandaccidentanalysis．Becausethelattertwotaketheobjectivefactsasthebasisandtheresultsaremorepractical，nowadaystheyarefocused．Basedondynamicimagese

3、quenceanalysis，theentireprocessofthecollisionCanberecorded．Meanwhilethequalitativeandquantitativeanalysisoftheentireprocessisirreplaceableinstudyofpassivesafety．Thispaperpresentsavehiclecollisionanalysissystemmethodbasedondynamicimagesequence．Therearefourmainworkswhichli

4、stasfollow：(1)Duringthedetectiontomovingtarget，especiallytheimagecapturedfromdynamicenvironment(particularlyvideofromthetrafficscene)wouldbeaffectedtoacertainextentbyvariousaspects，forinstancethechangesinweatherandlightconditionswhichwillresultindegradationofimage．Thispa

5、perimportsthemethodofimagerecoveringbasedonatmosphericphysicalmodeltoreducetheeffectonimagequalitymadebyatmosphereandpresentstheamalgamationmethod(threeframesmethod)ofbackgroundsubtractionandtemporaldifferencetorealizefastdetectiontomovingobject．(2)Fortherealizationofcam

6、eraaccuratecalibrationand1aterwork，itiSthepremiseandkeypointtoidentifythefeaturepointsfromthecollectionofdigitalimageandpinpointthepreciseimagingcenterthepoint，aswellasfeaturepointsontheprecisepositioningofimagingcenters，toachieveaccuratecameracalibrationandfollow-upimag

7、eofthepremiseandkeymeasurements．Inthispaperamongtherecognitionoffeaturepoint，weimprovenoisecancellationalgorithmwhichcarlcoarselycalibratethefeaturepointwiththenoiserecognition，thuseffectivelydecreasethecalculatingtimeOfthesub—pixellocationmethodbasedonthecenterofmass．Th

8、eencodingunitisintroducedtorealizetheautomaticmatchingbetweenIIl江苏大学硕士学位论文thecalibrationpointsandpixelp