智能儀表直讀裝置中的圖像處理及識別算法研究.pdf

1、JIIIfIlrllrrllrirlrllr!lIIiilIIHIIIIIY1436537分類號：——UDC：——密級：編號：工學(xué)碩士學(xué)位論文智能儀表直讀裝置中的圖像處理及識別算法研究碩士研究生：指導(dǎo)教師：學(xué)位級別：學(xué)科、專業(yè)：所在單位：論文提交日期：論文答辯日期：學(xué)位授予單位：胡習(xí)林閏保中研究員工學(xué)碩士導(dǎo)航、制導(dǎo)與控制自動化學(xué)院2008年2月2008年2月哈爾濱工程大學(xué)哈爾濱工程大學(xué)碩士學(xué)位論文ABSTRACTContraposing

2、tothevariousdefectsofthetraditionalmanualdigitmeterreading，peoplebringforwardanautomaticmeterreadingtechnologyanddigitcharacterrecognitionisaveryimportantlinkwhichisthecontentofthispaperThedigitmeterimageinthispaperissho

3、otingbydigitalcameras，recognitionprocessincluding：digitimagepreprocessing，digitcharacterlocationandcharacterrecognitionImagepreprocessingincludingimagedenoising，imagebinarizationandtiltcorrectionAgainstullknownlightcondi

4、tions，TheclassicbinarizationalgorithmssuchasOstualgorithmandBersenalgorithmcallnotextractobjectwell，SOweuseSDYanowitzalgorithmwhichinterpolatestheimagegreybygradientinformationThenitcangetdigitmeterframeinformationbyhori

5、zontalandverticalprojection，andextractlinebyimprovedHoughtransformFinallytheimageCanbecorrectedbyaffinetransformDigitcharacterlocationfirstusesaprioriknowledgeforapproximatelocationThenmorphologicenhancementandconnectedc

6、omponentfiltermakelocationmorepreciselyAtlast，thetangentrectangleCanbesolvedbyprojectionmethod，andcallbedifferentiatedbetweencompletecharacterandhalfcharacterCharacterrecognitionincludingentirecharacterrecognitionandhalf

7、characterrecognitiontwopartsAccordingtodigitcharactercharacteristicinformation，theentirecharacterusesthespecialmethodoftypographydigitrecognitiontoidentifyThehalfcharacterrecognitionusesslidingtemplatematchingbasedonimpr

8、ovedHausdorffdistancetoidentifyandbothofthemobtainahi曲rateofcorrectidentificationFinallythispaperhasconfirmedalgorithmactualfeasiblebyexperimentandgiveserroranalysiswhichpossiblyappearsKeywords：DigitCharacterRecognition；