基于列率內(nèi)插分層編碼的無損圖像壓縮及其DSP實現(xiàn).pdf

1、天津大學(xué)碩士學(xué)位論文基于列率內(nèi)插分層編碼的無損圖像壓縮及其DSP實現(xiàn)姓名：房旭申請學(xué)位級別：碩士專業(yè)：信號與信息處理指導(dǎo)教師：侯正信20080501ABSTRACTThepurposeoflosslessimagecompressionisteducetheamountofdatausedtorepresenttheimagewithoutanyinformationloss，SOtheoriginalimagecanberecover

2、edcorrectlywhendecodingIt’Smainlyappliedinsomeapplicationswheretheimagesaresubjectedtofurtherprocessing，repeatedcompression／decompression，highcostoftheimageacquiring，thedesiredqualityoftherenderedimageisvetunknownSuchasm

3、edicalimages，remotesensingimage，imagearchiving，highprecisionimageanalysisEfficientreal—timeiosslessimagecompressionhasalwaysbeenagoalpursuedbythepeopleTherefore，developingarealtimecompressionmethodbasedonDSPsareofsignifi

4、cantpracticalandcommerciaIinterestThispaperprimarilystudiesthelosslessimagecompressionbasedonlayeredcodingtechnologywithsequencyinterpolation，subsampling，anditsimplementationontheDSPdevelopmentplatformFirstofall，superimp

5、osingdigitalfilterandhowtoconstructatwo‘dimensionalIDCTlow‘passlimitedsuperimposingdigitalfilterareintroducedinthispaperSecondlyhowtosubsampletheimageandhowtointerpolationreconstructthesamplingdataarediscussedInaddition，

6、therealizationoflosslesscompressioncodingprocessisintroducedInthefollowing，howtointerpolateandreconstructtheimageisanalyzedtheIDCTlowpasslimitedfilterischosenasaninterpolationtemplateinthispaperFromtherespectsofcompressi

7、onrateandthecomplexityoftheoperation，itidentifiestheoptimalamountoflayerswhichimagesaresampledandthecodingtechnologyforrespectiveresidualdifferencedataandthetopleveldataThroughtheexperimentofthetestimage，theoptimalsubsam

8、plinglayersisdeterminedassixandselfadaptivearithmeticcodingisusedtohandletheresidualdifferencedataandtoplayerdataInaddition，therealizationprocessoftheadaptivearithmeticcodingisintroducedindetailTheIosslesscompressionfori

9、magesbythisarithmeticisrealizedwithCprogramintheconsoleofVC60ThecoderatesoflosslesscompressionforclassictestImagesarepresentedAtthesametime，whenuselayeredtransmission，therelationshipbetweenthenumberofresidualdifferencela