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毕业论文专业：电气自动化班级学号：1101-201103010124学生姓名：徐芳指导教师：杜贵锋助讲二〇一四年二月甘肃有色冶金职业技术学院毕业论文铁路供电生产远程督导系统——现场终端图像采集与处理技术研究Railwaypowersystem——Theterminalimageacquisitionandprocessing专业班级：电气1101班学生姓名：徐芳指导教师：杜贵锋助讲系别：机电工程系2014年2月甘肃有色冶金职业技术学院2014届毕业设计（论文）摘要随着我国铁路建设的飞速发展，铁路供电段生产管辖范围越来越宽广，技术人员应付生产现场的技术指导，疲于奔命，严重地影响了铁路供电的高效生产。就当前生产和科学技术现状，基于3G无线网络的铁路供电生产远程督导系统是目前解决问题的有效手段。论文基于DaVinci技术硬件平台和软件架构完成了督导系统终端图像采集与处理技术的设计，分析了3G无线网络的有限带宽对图像实时传输的限制问题，对视频处理技术提出了更高的要求——既要保证图像传输的实时性，又要保证视频图像的清晰度。结合铁路供电生产远程督导系统终端设备的便携性和可移动性，论文研究设计了一种新的图像处理方案——两种算法协调处理图像。在目标搜索阶段对视频质量要求不高但需要保证较小的延时，则采用最新的H.264压缩算法进行图像处理，目标锁定后允许存在一定的延时但要保证视频的清晰度，则对图像进行分割处理传输。设计通过调度终端发送指令的形式，完成了两种算法的灵活调用，保证了图像处理的高效性。设计的核心技术主要分为硬件设计和软件设计两大模块，硬件部分主要从视频处理、音频处理、存储器（DDR2和FLASH）、电源、USB接口、时钟等模块进行了具体设计；软件部分主要设计了视频处理、音频处理及控制模块的流程图和部分代码，其中视频采集模块采用Linux内核的V4L2进行设计，实现了对视频采集设备的控制。由于达芬奇硬件处理器TMS320DM6446集成了ARM内核和DSP内核，缩小了体积、降低了成本、提高了算法处理的性能，所以论文所设计的图像采集与处理设备具有体积小、成本低、算法处理能力强等特点，能够满足高质量视频在3G网络的实时传输功能关键词：远程督导；视频采集与处理；TMS320DM6446；图像分割；H.26ABSTRACTWiththerapiddevelopmentofChina'srailwaysystem,thescopeofmanagementofrailwaypowerfeedsectionbecomesmorewider.Itmakestechniciansbecomeexhaustedtogivetechnicalguidanceforconstruction,whichaffectstheproductionofrailwaypowersupplyseriously.Consideredthecurrentsituationofmanufactureandtechnology,sofar,therailwayremotesteeringsystembasedon3Gwirelessnetworkisaneffectivewaytosolvetheproblem.ThisarticledesignstheimageacquisitionandtheterminalofprocessingtechnologyofsteeringsystemwhichisbasedonDaVincitechnologyhardwareplatformsandprocessingtechnology--notonlytoensurethereal-timeimagetransmission,butthenitusesthelatestH.264compressionalgorithmforimageprocessing.Thecoretechnologyofdesigningcontainshardwareandsoftwaremodules.Hardwarepartdesignsthevideoprocessing,audioprocessing,memory(DDR2andFLASH),powersupply,USBinterface,clocketcanddrawsthecircuitdiagram.Softwarepartdesignstheflowdiagramandcodeofvideoprocessing,audioprocessingandcontrolmodule,andthevideocapturemoduleisdesignedbyV4L2ofLinuxkerneltocontrolthevideocapturedevice.ForDaVincihardwareprocessorTMS320DM6446integratestheARMcoreandDSPcore,itreducesvolumeandcostandimprovesthefunctionofthealgorithmprocessing,sothepaperdesignstheimageacquisitionandprocessingequipmentwithsmallersize,lowercostandstrongerabilityofalgorithmprocessing,whichisabletomeetrequirementofreal-timetransmissioncapabilitiesforthehigh-qualityvideoin3GKeywords:remotesteering;videocaptureandprocessing;TMS320DM6446;imagesegmentation;H.264甘肃有色冶金职业技术学院2014届毕业设计（论文）目录1引言................................................................................................................................................21.1铁路远程督导系统及应用.................................................21.2相关技术的发展现状.....................................................21.2.13G无线网络发展现状...............................................21.2.2图像处理技术发展及现状............................................21.3课题研究内容及章节安排.................................................32现场图像采集与处理技术..............................................................................................................52.1图像采集芯片简介.......................................................52.2图像处理硬件平台的选择.................................................52.3达芬奇技术介绍.........................................................62.3.1DaVinci硬件结构..................................................72.3.2DaVinci软件体系..................................................92.4算法..................................................................112.4.1H.264压缩算法...................................................112.4.2图像分割算法.....................................................133图像终端硬件设计........................................................163.1系统框图..............................................................163.2图像采集与处理模块....................................................173.2.1TVP5146与DM6446的硬件连接......................................173.2.2TVP5146与DM6446的数据通信......................................183.3存储器模块............................................................203.3.1DDR2模块........................................................203.3.2FLASH模块.......................................................223.4音频模块..............................................................223.5其他模块..............................................................243.5.1电源管理.........................................................243.5.2USB接口.........................................................244图像终端软件设计........................................................................................................................254.1系统整体框架..........................................................254.2主线程模块............................................................264.3图像线程模块..........................................................264.3.1图像采集驱动.....................................................26甘肃有色冶金职业技术学院2014届毕业设计（论文）4.3.2图像处理流程.....................................................304.4音频模块..............................................................335总结....................