毕业设计论文外文翻译-jpeg标准研究及算法实现.doc
- 文档编号:91826
- 上传时间:2022-10-02
- 格式:DOC
- 页数:15
- 大小:965.50KB
毕业设计论文外文翻译-jpeg标准研究及算法实现.doc
《毕业设计论文外文翻译-jpeg标准研究及算法实现.doc》由会员分享,可在线阅读,更多相关《毕业设计论文外文翻译-jpeg标准研究及算法实现.doc(15页珍藏版)》请在冰豆网上搜索。
JPEG2000图像压缩标准简介
郑州轻工业学院
本科毕业设计(论文)
——英文翻译
题目JPEG标准研究及算法实现
学生姓名
专业班级电子信息07级1班
学号
院(系)计算机与通信工程学院
指导教师
完成时间2011年4月10日
英文原文
JPEG2000imagecompressionstandard
andcharacteristics
Abstract
Withthedevelopmentofthenetworkandmultimediatechnologies,peopleneedmoreandmoreimageswithhighfunctionandquantity,sothecompressiveimagetechniquesrequirehigherperformanceaswellasnewcharacteristicstosatisfysomespecialuse.Forthis,ISOreleasedagainanewstaticimagecompresstechnique-JPEG2000,whichmaybecomethenewimagecompressionstandardinthefuture.
JPEG2000istoadapttothecontinuousdevelopmentofimagecompressionapplications,theemergenceofnewstillimagecompressionstandard.JPEG2000imagecodingsystemdescribestherealizationoftheprocess,ofwhichthebasicalgorithmusedisdescribedandkeytechnologies,introducedthenewstandardfeaturesandapplications,anditsperformanceisanalyzed.Withtherapidgrowthofmultimediaapplicationsandnetworkscontinuestodevelop,thetraditionalJPEGcompressiontechnologyhasbeenunabletomeetthepeople'sdigitalmultimediaimagedatarequirements,amorepowerfulandefficientsuperiorstillimagecompressionstandardhasbeenreferredtothedevelopmentagenda,thisisaJPEG2000.
1.Introduction
JPEG(JointPhotographicExpertsGroup)istheInternationalOrganizationforStandardization(ISO)developedundertheleadershipofthecommitteestillimagecompressionstandard,thefirstsetofinternationalstillimagecompressionstandardISO10918-1(JPEG)isthatestablishedbytheCommittee.AstheexcellentqualityJPEG,sothatwithinafewyearshewasagreatsuccess,iswidelyusedinthefieldofInternetanddigitalcamerasonthesite80%haveadoptedtheJPEGimagecompressionstandard.However,thecurrentJPEGstillimagecompressionstandard,withmid-rangeandhigh-bit-rateontheratedistortioncharacteristicsofagood,butinthecontextoflowbitrate,therewillbeobviousblockingeffects,itsqualityhasbecomeunacceptable.JPEGcannotbeprovidedinasinglestreamlossyandlosslesscompression,andcannotsupportmorethan64×64Koftheimagecompression.Atthesametime,despitethecurrentJPEGstandardhasarequirementtorestarttheinterval,butwhenbiterrorsencounteredwhentheimagequalitywillbeseriouslydamaged.Tosolvetheseproblems,sinceMarch1997onwards,JPEGimagecompressionstandardscommitteestartedtodevelopanewgenerationofimagecompressionstandardtoaddresstheseproblems.InMarch2000theTokyoconferencetoidentifyanewgenerationofcolorstillimagecodingstandardJPEG2000imagecompressioncodingalgorithm.
2.JPEG2000imagecompressionstandardprofile
JPEG2000systemisdividedintothefollowingsevenparts:
①JPEG2000imagecodingsystem
②Expansion(tothecoreofthedefinition①addmorefeaturesandsophistication);
③movementJPEG2000;
④consistency;
⑤referencesoftware(nowincludesJavaandCimplementation);
⑥compoundimagefileformat(fordocumentscanningandfaxapplications);
⑦oftheminimumsupportto①(technicalreport).
①asfullyaccreditedISOstandardthatdefinesthecorecompressionandminimumfileformats,②~⑥definitionofcompressionandexpansionoffileformats.Which,①hasbeenfinalized,andotherarestillinprocess.DiscussedinthisarticleisbasedontheJPEG2000standardPart1.
Intheencoder,firstlythesourceimagesoftheresultofthepre-treatment,todealwiththeresultsofdiscretewavelettransform,waveletcoefficientsobtained.Thenthewaveletcoefficientswerequantizativedandentropycoding,thefinalcompositionofthestandardoutputcodestream(bitstream).Decodersareencoderreverseprocess,Firsttocodeflowunpackandentropydecoding,andthenreversetoquantifyanddiscretewaveletinversetransform,inversetransformtheresultsofthepost-processingsynthesis,wehavereconstructedimagedata.AlthoughJPEG2000andJPEGencodinganddecodingprocessissimilar,thereisaverybigdifferencebetweenthetheconcreterealizationofeachstep.Thegeneralstepsintheencodingprocessisasfollows:
(1)composedofmorethanonecolorcomponentimageisdecomposedintoasinglecolorcomponentimage.Therearecertaincorrelationbetweenweightbydecompositionrelatedcomponents,throughthedecompositionoftherelevantcomponentstransformcanreducetheredundancybetweenthedatatoimprovecompressionefficiency;
(2)componentsoftheimageisdecomposedintoarectanglethesizeofaunifiedpiece-theimagechip.Imagefilmistransformed,andthebasicunitofencodinganddecoding;
(3)Everyi
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 毕业设计 论文 外文 翻译 jpeg 标准 研究 算法 实现
![提示](https://static.bdocx.com/images/bang_tan.gif)