身份照片的改進壓縮編碼算法研究與實現.pdf

1、武漢理工大學碩士學位論文身份照片的改進壓縮編碼算法研究與實現姓名：李占申請學位級別：碩士專業(yè)：信號與信息處理指導教師：闕大順20050601武漢理工大學碩士學位論文AbstractPersonalidentificationpictureisakindofspecialpicture，SOitisproverbiallyexistedinallkindsofthefieldswhichwelivesinWiththecorrespond

2、ingtechnologydevelopmentandtheupdatingofidentitymanagementsystem，newgenerationofinformationstoredidentitycardcameout，suchas2dimensionbarcodeandICcardButthosecapacitiesarelimitedInordertostorethepicture，nalne，sex，nationan

3、dotherinformationina2dimensionbarthecompressionofidentificationpicturehasbeenapivotaltechnologyofnewgenerationidentitycardThetraditionalEZWcodingcompressesthewholepicture，SOthecompressionqualityandvisualeffectofpersonali

4、dentificationpicturearetoobadtecognizeInviewofvisualeffectandsignificanceofdifferentregions，theprogramdividesthewholepictureintothreeparts：rectangleofROI，backgroundregionandprofileregionInthispaper1inchpersonalidentifica

5、tionpicturesaretakenascompressingobjectResearchingworkincludesEZWcoding。theimplementationthattheprogramusestherun—lengthcodingorstraightlinefiaingcodingtocompresstheoriginalprofilecodeandthebatchprocessingwaysthattheprog

6、ramsegmentspersonalidentificationpicturesfromthescannedpictureandsavesthemasindividualpicturesforthecodingprogramFirstlythetheoryofwaveletandROIisintroduced，andthentheimplementationofMallatalgorithmofwaveletisanalyzedind

7、etailTheprogramimplementsthemethodthatEZWcodingintegrateswithrunlengthcodingandstraight—linefittingcodingrespectivelyonVisualC十60platformInordertoeliminatetheredundancytheprogramcompressestheprofilecode，whichimprovestheq

8、ualityoftheidentificationpicturesTheexperimentverifiesthattheperformanceandeffectofcompressionaresatisfyingTherefore，thesecondgenerationidentificationpictureCanbeusedthemethodforreferenceFirstlyimagecompression’Stheorysi

9、gnificanceandbackgroundofthesislselectionandthemainresearchareintroducedThemainresearchincludesthecontent，methodandtechnologyThenwavelettheoryEZWcoding，ROIcodingareintroducedbrieflyHowtoimplementROIcodinginthealgorithmfr