圖像處理技術在連鑄坯裂紋檢測中的應用研究.pdf

1、東北大學碩士學位論文圖像處理技術在連鑄坯裂紋檢測中的應用研究姓名：胡振偉申請學位級別：碩士專業(yè)：檢測技術與自動化裝置指導教師：謝植20060201東北大學碩士學位論文AbstmctStudyontheContinuousCastingBillet’SCrackDetectwithImageProcessingTechnologyAbstractCrackisanimportantparameterofcontinuouscastingb

2、illet’squalityInthispaperuseImageProcessingtechnologyinsteadofhumandetecttoimplementtheautodetectingofcrackEscapetheinterruptionofhumanfactorthenthedetectspeedandefficiencyisimprovedThepaperhasdetectedthecontinuouscastin

3、gbillet’ScrackbasedonImageProcessingtechnologyAnalyze“thevisualcharacteristic，imageelementcharacteristic，noisecharacteristicofthecrackimageAccordingtothecharacteristicchoosetherightarithmeticssuchasadvanceprocess，Mathema

4、ticalMorphologyprocess，remarkthecrackwithinterconnecteddomaindetecttopracticethecrackdetect(1)AccordingtothecharacteristicofthecrackimagechoosetherightarithmeticsThenanalysisandexpatiateuponthearithmeticusedincrackdetect

5、ing，alsoprogrammingtheprogramcorrespondtothearithmeticsUsegrayarithmeticchangethecolorimageintograyimageSOthatCanmakethefollowingprocessingmucheasier；usemiddlevaluefilterteducethenoiseoftheimage，thentheimagebecomemoresmo

6、oth；calculatethethresholdvalueoftheimageaccordingtotheprobabilityoftheelement’Svalue，thencallthethresholdtransformationfimctiontodividethegralyimageintowhite—blacktwovalueimage；onthewhite—blacktwovalueimage(2)UseMathemat

7、icalMorphologyoperationtesumeandstrengthenthecrackareaintheimagesuchaserodentoperation，dilatedoperation，regiongrow(3)RemarkthecrackwithinterconnecteddomaindetectFor12crackimagesasthreestepsofcrackimagepretreatment，crackM

8、athematicalMorphologyoperation，crackinterconnecteddomaindetectfinishedthecrackdetectGivesouttheresultanddata，thenanalysesthereasonwhythecracksCannotbedetectedTotallythereare4reasons，accordingthisreasonsomesuggestionsarep