资源描述：
《基于混沌映射和DCT变换的图像加密解密算法(英文)》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、CentralSouthUniversityofForestry&Technology课程论文学位类型：专业型学科、领域：计算机应用技术研究方向：智能检测和自动控制导师姓名：张凌涛学生姓名：曾照成学号：20141200022入学时间：2014年9刀授课教师：车主兵课程名称：高级人工智能基于混沌映射和DCT变换的图像加密解密算法曾照成1(20141200022)(中南林业科技大学计算机与信息工程学院长沙410004)ImageEncryptionandDecryptionAlgorithmBasedonChaoticMappingandDCTTransformZengZhaoC
2、heng(CollegeofComputerandInformationEngineering,CentralSouthUniversityofForestryandTechnology,Changsha4100()4,China)Abstract:Imageconfidentialtransmissionintheprotectionofprivateinformationandtradesecretshaswideapplicationspace.Inthispaper,wegettheaddressoftheimagescramblingtransformationco
3、debyusingtheLogisticchaoticmap,thentheencryptionoperationfortheoriginalcolorisdonethroughtheranksscrambling,AfterthefeatureisextractedbycarrierimagewiththeblockedDCTtransform,somethree-dimensionalencryptimageswillbedirectlyembeddedintoit,whicharedisplayedasthecarrierimage.Extractingtheencry
4、ptimageshasjusttheinverseprocesstotheembeddedone・Finallywemadeascramblingagainaccordingtothekeyafterextractingtheinformation,whichwillbeaclosetotheoriginalimage,withthePeakSignaltoNoiseRatio27.37・Keywords:Logisticchaoticmapping;sorttransformation;DCTtransform;key摘要：图像的保密传输在保护私入信息和商业秘密等方面具有广
5、泛的应用空间。本文利用Logistic混沌映射得到图像置乱的地址变换码，通过行列置乱直接实现对原始彩色图像的加密操作，再对载体图像利用分块DCT变换提取特征后直接嵌入三维加密图像信息，液入信息后的图像显示为载体图像。提取加密图像信息的过程是液入过程的逆过程，提取信息后再根据密钥进行反置乱，即可恢复出接近原始图像的还原图像，该图像与原始图像的峰值信噪比为27.37。关键词：Logistic映射；排序变换；DCT变换；密钥1IntroductionWiththecontinuousdevelopmentofinformationnetworktechnology,itcanbec
6、onvenientforpeopletopasseverydigitalinformation(suchasmusic,video,filmandtelevision)toallovertheworld,andsccrccytransmissioninfieldslikeprivateinformationprotcctionandcommercialprivacyiswidelyapplied.Secrecytransmissionincludesfirstencryptionwiththeobjectiveinformation,andthentransniissiona
7、fterconcealing,aimingatimprovingthesecurityduringthewholetransmissionprocess,meanwhile,thereceivercouldgetexactlytheoriginalinformationwithakeyafterextractingtheencryptioninformation.Infoirmuionhidingtechnologytakesuseoftheinsensitivityofhumans9senseorga
