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Arnold置换图像置乱，用于数字水印；(Arnold Replacement Image Scrambling for Digital Watermarking )

1 D code for FDTD in matlab

对数字信号的波形及其频谱分析，着重比较其在时域和频域上的差别(Digital signal waveform and its spectrum analysis, focused on comparative differences in the time domain and frequency domain)

清华大学出版社 周品版 MATLAB图像处理与图形用户界面设计源代码(MATLAB image processing and graphical user interface design source code)

这是一个用Matlab程序写的模拟退火算法，用于解决旅行商问题(It s a matlab code for TSP problem using SA Algorithm)

在matlab环境下对图像进行四叉树分解，在此基础上对图像进行分析(In the matlab environment, an image quad-tree decomposition, in this based on image analysis)

说明：  计算光纤模场分布和传播常数，输入模式的阶数，计算得到各类模式的模场分布。直接运行main，在其中修改参数，至少可以计算5层光纤结构。(Calculation of optical mode field distribution and propagation constant, the order input mode, calculated by various types of mode-mode field distribution. Direct run main, in which the modified parameters can be calculated for at least 5 layer fiber structure.)

说明：  最小主瓣的Beamforming 利用的cvx优化(CVX optimization of beamforming utilization with minimum main lobe)

其文章包含4个文件:些文件是基于matlab的源程序:P0309：运用5种不同的梯度增强法进行图像锐化P0310：图像的高通滤波和掩模处理 P0311：利用巴特沃斯（Butterworth）低通滤波器对受噪声干扰的图P0312利用巴特沃斯（Butterworth）高通滤波器对图像进行锐化处(The article contains four documents: these documents is based on the matlab source: P0309: the use of five kinds of different gradient enhanced image sharpening method P0310: Image of high-pass filtering and mask handle P0311: the use of Butterworth (Butterworth) low-pass filter for noise interference by the use of the map P0312 Butterworth (Butterworth) high-pass filter for image sharpening Department)

cryptography is a technique used for decryption and encryption