Numerical-Techniques-in-EM_sadiku

说明：  关于半色调编码计算全息图的信息隐藏Matlab程序的说明： 算法实现主程序为CGHwatermark； 位相恢复函数为phaseSL； 用计算全息记录已知振幅和位相的复波前函数为Hologen； 半色调编码函数为AMhalftone； 嵌入信息的提取直接调用Matlab自带的FFT2函数； 主程序的函数调用关系如下 读入宿主信息和水印信息-----------phaseSL--->Hologen--->AMhalftone(完成嵌入)--->FFT2（提取水印信息） 主程序结果保存于holo&mark文件夹 对算法鲁棒性测试的程序： 1. 对于剪切操作 Cliptest 结果存放于cliptest文件夹 2. 对于缩放操作 zoomtest 结果存放于zoomtest文件夹 3. 对于旋转操作 rotatetest 结果存放于rotate文件夹 4. 对于滤波操作 filtertest 结果存放于filtertest文件夹 5. 测试算法的时间效率 timetest 6. 分析嵌入信息后图像质量与参数alpha，tao的关系 msetest(err)

说明：  EMD matlab实现代码，可以直接用。经验模态分解（Empirical Mode Decomposition，EMD）是由 Huang等人于1998年提出的一种针对非线性、非平稳信号的自适应信号分解算法。(Empirical Mode Decomposition (EMD) is an adaptive signal decomposition algorithm for non-linear and non-stationary signals proposed by Huang et al. in 1998.)

generates putative matches between previously detected feature points in two images by looking for points that are maximally correlated with each other within windows surrounding each point.(generates putative matches between previ ously detected feature points in two images by l ooking for points that are maximally correlate d with each other within windows surrounding ea ch point.)

Binary Subtraction performs binary subtraction for two bit arrays and produces back the result, can be used if you represent your bits/symbols as array elements.

you can see how the ball is tracking on the short movie

帮助大家学习用MATLAB绘图处理数据的实用型文档。(The PDF is used for helping us study MATLAB for drawing and data processing)

使用有限时域差分法，用matlab模拟三维光子晶体(the simulation of TM mode in three-dimensional photonic crystals)

文章Image information and visual quality的程序———应用视觉保真度（ＶＩＦ）的方法(Article Image Information and Visual quality program--- visual fidelity (VIF))

semulink de hacheur devolteur et hacheur abisseur

matlab code embedding watermarking