基于arm的嵌入式图像监控系统研究硕士学位论文

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1、IIStudyofanEmbeddedImageMonitoringSystemBasedonARMDiscipline:ControltheoryandcontrolengineeringStudentsignature:Supervisorsignature:ABSTRACTWiththerapidevolutionofdigitalimage,embeddedcomputerandcommunicationtechnique,embeddedimagemonitoringsystembecomesanewresearchingint

2、erest.However,alargenumberofpointlesspicturesaretransmittedbacktothemonitoringcenter,whichincreasescommunicationquantityandsurveillanceload;generally,theimage’sdefinitioninremotesurveillanceislowbecauseofitslimitedtransmissionchannel.Animprovingwayismovingobjectdetectioni

3、nthefrontofsystem,andsnatchingahighdefinitionpicturewhenmotionhappensandthentransferringbacktothemonitoringcenter.Thismethodcansettlethecontradictionbetweendefinitionandtransferringspeed.Inthedissertation,akindofembeddedimagemonitoringsystembasedonARMisdiscussed.Thesystem

4、hasthefunctionsofmotiondetectionandpicturetransmissionbasedonGPRS,andimprovestheflexibilityofsettingandthedefinitionofabnormalpicture.ThesystemtakesLPC2210basedonARM7coreasitscentralprocessor,andembeddedOSµC/OS-IIasitssoftwareplatform.Movingobjectdetectionadoptsamethodofd

5、ynamicdifferencebackgroundimage,whoseprincipleistocalculatedifferencepictureamongthecurrentframesandbackgroundimagesandtakethemotionadjudgingthresholdwhichownsmaximuminformationentropytodeterminemovingarea;anddynamicallyupdatesbackgroundbyusingKalmanfilter.Thus,thesystemr

6、ealizesthejudgmentofthemovingareaunderthecomplicatedchangingbackground.ThemonitoringsystemadoptsembeddedWebservertechnologytosendwarninginformationandon-the-spotpicturetotheremotemonitoringcenter.Thewiredorwirelessremotetransmissionchannel(EthernetorGPRS)canbeadoptedbetwe

7、enthecenterandthefrontcontrolpoint,andhasthefeaturesofmutualsupplement,convenienceandflexibility.AndGPRScommunicationterminaladoptsWavecomwirelessmoduletotransmitmonitoringimagethroughwirelesscommonnetwork.Inthedissertation,theprincipleandimplementationofembeddedimagemoni

8、toringsystembasedonARMarediscussed.Experimentalresultsshowthattheimplementedsystemperformswellin