基于字幕的新聞事件檢索應(yīng)用研究.pdf

1、北方工業(yè)大學(xué)碩士學(xué)位論文基于字幕的新聞事件檢索應(yīng)用研究姓名：李燕申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：計(jì)算機(jī)應(yīng)用技術(shù)指導(dǎo)教師：劉文萍20070520北方I：業(yè)人學(xué)碩士學(xué)位論文ResearchofNewsEventretrievalbasedonCaptionAbstractNewsvideoisoneofthemostimportantmediaforuserstogettheinformationwhicharerelatedtothepeople

2、’SdailylifeItisanurgentdemandformanagingandretrievingtheinterestednewsfromahugeamountofnewsvideodataefficientlyandcorrectlyInnewsvideo，thecaptiousprovidethekeyfortherelatednewsstoryandtheyCanbeusedfortheeffectiveretrieva

3、lThisthesisproposesacaptionbasednewsvideoretrievaltechnique，anddevelopsaprototypesystemfornewseventretrievalTheprototypedsystemconsistsoftwomodules：①newseventsegmentationand②newseventretrievalThenewseventsegmentationmodu

4、leistopartitionthenewsvideointoseveralindividualnewsstoriesbydetectingspecialevents(suchastextevent，anchorpersonshot)Animprovedalgorithmfortexteventdetectionisproposedandananchorpersonshotdetectionalgorithmisdevelopedint

5、histhesisExperimentalresultsdemonstratethattheaccuracyofthetexteventdetectionalgorithmisachieved，andtheanchorpersonshotdetectionalgorithmiseffectiveThenewseventretrievalmoduleistolocateandextractthecaptioninthenewseventT

6、hen，therecognizedtextinformationiSstoredinthedatabaseasindexforusertetrievetherelatednewsInthisthesisedgedetectionandconnectedregionlabeledmethodsaleusedtolocatethecaption，andthenthethresholdsegmentationmethodisUsedtoext

7、ractthecaptionFinallytheChineseopticalcharacterrecognitionsystemdevelopedbyHanWangCompanyisemployedforthesegmentedcharactersrecognitionTheprecisionofthecaptiondetectionishigherthan85％，whiletherecognitionrateisnothighenou