DIP_Lecture_8

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1、ShanghaiJiaoTongUniversityInstituteofImageCommunication&InformationProcessingSchoolofElectronicInformation&ElectricalEngineeringDept.ofElectronicEngineering2010ShanghaiJiaoTongUniversityInstituteofImageCommunication&InformationProcessingChapter8SchoolofElect

2、ronicInformation&ElectricalEngineeringDept.ofElectronicEngineering2010DigitalImageProcessingIntroductionofImageCompressionTheoreticalFundamentalsofImageCompressionEntropyCodingPredictiveCodingTransformCodingWaveletCodingImageCompressionStandards2010DigitalIm

3、ageProcessingIntroductionofImageCompressionTheoreticalFundamentalsofImageCompressionEntropyCodingPredictiveCodingTransformCodingWaveletCodingImageCompressionStandards2010DigitalImageProcessing•Imagecompressionplaysamajorroleinmanyimportantanddiverseapplicati

4、ons-televideo-conferencing-remotesensing-documentandmedicalimaging-facsimiletransmission(FAX)-controlofremotelypilotedvehiclesinmilitary,spaceandhazardouswastemanagementapplications-digitaltelevision-cellphone-VCD&DVDplayers-VOD(comic.sjtu.edu.cn)-DC&DV-vide

5、osurveillancesystem-databasesoffingerprints&humanfaces-…2010DigitalImageProcessing•Everyday,anenormousamountofinformationisstored,processed,andtransmitteddigitallyovertheInternet•Becausemuchoftheon-lineinformationisgraphicalorpictorialinnature,thestorageandc

6、ommunicationsrequirementsareimmense•Methodsofcompressingthedatapriortostorageand/ortransmissionareofsignificantpracticalandcommercialinterest•Imagecompressionaddressestheproblemofreducingtheamountofdatarequiredtorepresentadigitalimage•Atsomelatertime,thecomp

7、ressedimageisdecompressedtoreconstructtheoriginalimageoranapproximationofit2010DigitalImageProcessing•Theinitialfocusofresearcheffortsinthisfieldwasonthedevelopmentofanalogmethodsforreducingvideotransmissionbandwidth,aprocesscalledbandwidthcompression•Theadv

8、entofthedigitalcomputerandsubsequentdevelopmentofadvancedintegratedcircuits,however,causedinteresttoshiftfromanalogtodigitalcompressionapproaches•Withtheadoptionofseveralkeyinternationalimagecom