图像信息隐藏算法的研究与实现-翻译

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1、苏州大学本科生毕业设计（论文）附件：外文文献资料与中文翻译稿外文文献资料收集：苏州大学应用技术学院11电子班（学号1116405026）马玲丽ImageInformationHiding:AnSurveyI.INTRODUCTIONNowadaysmanyproblemsariseduringtheimagetransformationfromthesendertothereceiver.Strangerscaneasilysnoopintoothersaccountandgetmanysecretinformationevenitwashidedbys

2、omemechanism,withouttheirpermission.Toavoidthisweproposeasecureschemebyusingsteganographyconcept.Steganographymeanshidinginformationinaparticularwaythatpreventsthedetectionofhiddeninformation.Inthisconceptnoonecanfindthatthereisahiddenmessagepresentintheimage,Becauseofinformation

3、ishiddenbehindanimageinamatrixform,whichiscreatedbybitmatrixoftheobject.ByusingtheLSBwecanstorethecharacteristicsofparticularpixelsofanimagearemodifiedtostoreamessage.Finallywesendthefinalpictureandcoverimageusedforhiddentheimagetothereceiver[Johnson&Jajodia,1998].Atfirstwecalcul

4、atetheheightandwidthoftheimage,whichhidetheinformationthenmultiplyitwith8andstoreitinanyvalue.Thenwecalculatetheheightandwidthoftheimagewhichisusedtohidetheobjectandmultiplywitheachother.Thenwecomparethatanswerswithboththeimagewhichisusedtohidetheinformationandwhichisusedtohideth

5、eobject.Theimagewhichisusedtohidetheobjectmusthavegreatervaluethantheotherimage;wechoosetheobjectmustsatisfytheabovecondition.Thentheencodedmatrixismappedwiththeimagebyusingleastsignificantbitmechanism.Leastsignificantbitonlystorestheinformationinsteadofreplacingthepixelofimage.S

6、oscatteringofinformationtakesplacewhiletransferringtheimagesoaccordingtohumaneyethereisnodifferencebetweentheoriginalandstegoimage.Finallysendersendsthebothoriginalandstegoimagetothereceiver.InthereceiversidetogettheinformationthereceivermustdoXORoperation第19页苏州大学本科生毕业设计（论文）附件：外文

7、文献资料与中文翻译稿betweenbytespresentinboththeimage.Comparetheresultwith0*00000000Iftheoutputwillbeyesthenstore0else1inamatrixandthismatrixwillbeequaltothewidthandheightofthepixelmatrixoftheimage.Convertthebitsintobytesuntilallbitsgotutilized.Finallyreceivergetstheinformation.1.1.History

8、ofInformationHiding1.2.TheBasicsofEmbedd