（信号与信息处理专业论文）公交车多路视频监控系统中监控中心的实现研究.pdf

? ? i ? ? ? ? ? ? ? dm365 dvr ? ? ? tcp ? mfc ? ? ? ? ? pc ? ? ? ffmpeg ? directdraw ? ? windows socket ? ? h.264 ? ? ? ? hough ? ? ? ? ? ? ?专? hough ? ? ? ii abstract with rapid development of public transport, a more intelligent bus video monitoring system of multi-channel is required. designing monitoring center of multi-channel bus monitoring system is significant. the center has many functions, such as multi-channel show at same time, multi-channel record at same time,the display of the recording material and the intelligent video algorithm. bus multi-channel monitoring system of bus terminal is dm365 dvr, the monitoring center using mfc programming method to realize. this paper firstly describes bus video monitoring system of multi-channel monitoring center function structure, then emphatically introduces the monitoring center based on pc control software realization. separately studied the monitoring center login bus terminal, streaming video transmission, decoding, display, control, and uses some key techniques, the decoding part using ffmpeg techniques, display part used directdraw technology, network transmission part using the windows socket programming techniques, the basic functions of general monitoring system are realized, such as multiple real-time monitoring, multi-channel storage, played h.264 video files, control the bus terminal etc. in addition, puts forward a people counting algorithm with vertical perspective, which combined body head information detection and foreground target tracking, among which the head count information detection using an improved method of detection of circular random hough transform, using the movement target tracking characteristic parameters matching method. finally, the monitoring center software and the toll performance of the algorithm are tested, and the result shows that the monitoring center software decoding and display effect is fluent, the people counting algorithm can accurately count the number of persons at video monitoring scene. key words: bus video surveillance system surveillance center video decode people counting hough transform ? ?专 ?专 ?专 ?专 ?专 ? ? ?专 ?专 ?专 ?专 ? _ ? _ ?_ ?_ ?_ ? ? ? 1 ? ? 1.1 ? ? ? ? ? ? ? ? 2009 ? ? ? ? ? ?intelligent transportation systems?its? ? apts?advanced public transportation system? ? ? ?12? ? ? ? ? ? ? ? ? ?;? ? ? ? ? 2 1.2 ? ? 20 ? 60 ?1988 ? ? mobility 2000 ? 1991 ? ?(inteligent vehicle and highway system-ivhs)? 21 ? ? ? vivoda ? ? mpeg-4 ? vdh-2202? ? g723.1(?)h.263/mpeg-4(?)? ? 4 ? ? ? 20 ? 90 ?1998?2000 ? ? gsm ? 2004 ? ? globaltrack ? ?(l)?(gm-4)+?(2)? ? cdma ? sim ?(3)? gps/?/? ?(4)? gsm modem(?)?(5)? 3 ? internet? adsl/lan/pstn/isdn ?(6) ? 1024 ? ? 16 ?(? 4 ? ?)? gps ? ?(7)? ? 16 ? 16 ? ? ? gprs/cdma ? ? ? ? gprs ? 2g ? ? ? ? 3 ? gsm ? gprs ? ? 2g ? ? ? 2009 ? 3g ? ? ? ? ? ? ? ? 3g ? ? ? ? 1.3 ? ? dm365 ? dm365 ? tcp ? socket ? ? ffmpegsdk ? h.264 ? directdraw sdk ? ? ? ? ? ? linux ?h.264 ? windows ? ? ? cs ? bs ? ? cs ? ?bs ? activex ? ? ? ffmpeg ? ? ? ? 4 directdraw ? mfc ? ? ? hough ? ? ? ? ? ? ? ? ? ? ? ? 5 ? ? 2.1 ? 2.1.1 ? ?wlan ? 3g ? ? ? rtp ? tcp ? rtp ? ietf ? 1996 ? rfc1889 ? rtp ? ?rtp ? ? ? rtcp ? ? ? ?push to talk? ? ? h.323 ? sip? ? ? ip ?rtp ? rtp ? rtcp ?rtc ? ?udp?rtp ? ?rtp ? ?rtp ?rtp ? ? tcp ?transport layer? ? ietf ? rfc793 ?specified? ?tcp ? ? ? ?tcp ? tcp ? tcp ? ? ? tcp ?socket? ? tcp/ip ? ? unix ? ? ? 1982 ? unix bsd ? ? unix ? ? int ? ? ? ? ? 6 ? ? id? ?(? ip ?)? ? ? (port)? ? internet ?3? ? socket0 ? ? 2.1.2 c/s ? b/s ? ?/? ?c/s? ?/?(b/s) ? ? ? ie ? ?c/s ? ?c/s ? ? c/s ? ? ? c/s ? ? windows ? b/s ? activex ? ? ? ? ? ? html ? ? c/s ?b/s ? activex ? dm365 dvr ? c/s ? b/s ? ? ? ? ? 7 2.1.3 socket ? ?/? socket ? socket() connect() send()/receive() close() bind() accept() send()/receive() close() ? bind() listen() ? socket() ? 2.1 ? socket ? tcp ? ? socket ? ?1? socket()? ? linux ?sock stream?sock dgram? ? ? tcp ? udp ? ? tcp ? ?2? ? bind()? ? ? ? 7620? ?3? listen()? ? ?4? connect()? accept()? ? ?5? send()? receive()? ?6? close ? socket()? ? socket? ? ? ? ? ? 8 ?(client/server)? ? fork()? ? ?socket ? select ? ? 2.2 ? 2.2.1 h.264 ? h.264 ? itu-t ?vceg? iso/iec ?mpeg? ?jvt?joint video team?456? h.264 ? h.264 ? ? h.264 ? ? mpeg-2 ? 2 ? ? mpeg-4 ? 1.5?2 ? ? ? 88gb? ? mpeg-2 ? 3.5gb? 25?1? h.264 ? ? 879mb? 88gb ? 879mb?h.264 ? 102?1? 2.2.2 ? h.264 ? ?h.264 ? ?78? h.264 ? h.264 ? ? 2.2 ? vcl ? nal ? ? nal ? vcl ? nal ? ? nal ? h.264 ? rtp/udp/ip ? ? ? ? ? 9 专 ? 心字心专界字心插慢 ?专 ?h.264 ? h.263 v2(h.263+)? mpeg-4 ?(simple profile)?h.264 ? ? 50%?h.264 ? ? h.264 ?(?)? ? ? h.264 ? ? ?h.264 ?(video coding layer?vcl) ?(network abstraction layer? nal)? ? ? ?h.264 ? ?h.264 ? ? ?h.264 ? 2.3 ? 2.3.1 ? ? ? ? ? ? ? 10 ?1? ? ?2? ? ?3? ? ? ? ?1314? ?i/o ? ? ? api? ? bsp? ?ti ? dm3x ? ?91011? 2.3.2 linux ? ? ? ? ?uclinux?windows ce?qnx?vxworks?ose?nucleus? linux ? ? linux ? linux ? ?1?linux ?(osi)? ? ? ? ?2? linux ? ?shell? ?linux ? ?3? windows ?linux ? ? ? ? 11 ? ?linux ? internet? ? ? linux ? isp/icp ? internet ? apache ? web ? ipalias ? virtual box ? virtual hosting ?dns?sendmail ? ? ftp?telnet ? 2.4 ? ?thread? cpu ?win32 ? ? win32 ? ? api ? c ? ? ? ?“?”? ? ? ? 2.4.1 ? ? ? ? visual c+? cwinthread ? ? ? ? main()? winmain()? ? ? ? ? cpu ?cpu ? ? cpu ? ? ? ? 12 ? ? cpu ? ? ? ? cwinapp ? ? ? ? cwinthread ? ? ? ? 2.4.2 ? 1. ? ? ? fun1()? cwinthread ?*pthread? afxbeginthread(fun1?param?priority)? pthread ? ? fun1()? fun1 ? ?param ? fun1 ? 32 ?priority ? ? 2. ? ? cwinthread ? int getthreadpriority(); bool setthreadpriority(); ? ? ? cwinthread ? win32 sdk ? getpriorityclass()? setpriorityclass()? 3. ? ? ? ? 13 cwinthread ? suspendthread()?resumethread()? ? ? ? ? ? ? ? ? ? ? ? ? ? ? suspendthread() ? ? ? ? ? ? ? ? ? ? ? ? resumethread()? 4. ? ? afxendthread()? ? bool terminatethread( handle hthread? dword dwexitcode) ? closehandle()? ? ? 2.4.3 ? ? ? ? ?windows ? ?critical section? ?(event)? ?semaphore? ?mutex? ?ccriticalsection? ?“?” ? ? ? ?cevent? ?socket ? a? ? b? cevent ? a ? b ? ? setevent()? ?cmutex? ? ? ? ? ? ? ? ? 14 ?csemaphore? ? ?”? ? ? ? ? 1? ? 0 ? ? 2.5 ? ? linux ? tcp? windows ? ? socket ? ? h.264 ? ? windows ? ? ? ? ? 15 ? ? 3.1 ? ? 3.1 ? ? dm365dvr?dvr ? h.264 ? 3g ? ?dvr ? 3g ? ? wlan ? ? ? ip ? ? ? cs ? bs ? bs ? ?cs ? ffmpeg ?directdraw ? mfc ? wlan ? ?