必威体育官网网址图像传输模型.doc

必威体育官网网址图像的传输模型 摘要：当今社会信息飞速发展，信息的传递俨然成为各企业间文化交流的重要方式，因此越来越多的企业重视信息的安全传输.本文通过建立一套合理的加密解密模型，实现了隐藏信息的安全传送. 针对问题一，首先对图像进行R,G,B分层预处理，接着运用一种新型的图像置乱方法—基于初等函数图像变换的置乱方法，对图像进行了良好的置乱.然后，采用了改进的LSB算法，将图像进行完整地嵌入，实现图像的加密过程. 针对问题二，首先从接收到的合成图像运用改进的LSB算法的逆运算提取出隐藏信息，并将正确的解密密钥代入信息解密模型进行运算，完成必威体育官网网址信息的解密全过程. 针对问题三，将正确的加密密钥及解密密钥代入模型中，得到图像加密—传送—接收—解密的全过程，并运用MATLAB绘制完整界面图形. 针对问题四，从置乱度，抗攻击（抗裁剪检验、加噪检验）和破译率三个方面对模型进行检验，并引入局部均值方差比对检验效果进行量化说明.检验结果显示，图像置乱度，抗攻击性还原度0.9017，表明该模型具有较强的稳定性和适用性. 关键词：基于初等函数图像变换的置乱方法；改进的LSB算法；局部均值方差检验 Secret image transmission model Abstract：Todays society rapid development, information information transfer has become the cultural exchange between each enterprise important ways, so more and more attention of the enterprise information securely. This article through establishing a reasonable set of encrypt, decrypt model, realized the hidden information security transfer To solve the problem of image is one, first, the B .R, G layered pretreatment, then using a new image scrambling method -- on the primary function of image transformation of image scrambling method, the good scrambling. Then, using a LSB algorithm improved complete image embedded, realize image encryption process. To solve the problem 2, first from receives the synthetic images by the improved algorithm of inverse LSB hidden information, and extracted the decryption key generation will correct the information decryption model calculations to complete the declassification of confidential information process. To solve the problem of three, will correct and decryption key encryption key generation going into the model, get image encryption -- transmit - the whole process of received - decryption, and using MATLAB drawing complete interface graphical. To solve the problem from four, scrambling degree, resistance to attack (resistance to cutting inspection, add noise test) and crack rate, three aspects of model, and proposes the inspection of local mean variance inspection effect than quantitative description. Test