(chp4)

steganalysis characteristic

C.Primer.Plus 第五版 书中的源代码(C.Primer.Plus fifth edition of the book' s source code)

说明：  基于MATLAB的高压直流输电仿真模型，模型包含整流和逆变两个部分。仿真模型运行结果成功，波形良好。(Based on MATLAB, the HVDC transmission simulation model consists of two parts: rectification and inverter. The simulation model runs successfully and the waveform is good.)

matlab-edu-codes 32 .m files !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

This Code realizes the Esprit algorithm.

输入是一个矩阵，运行程序后得到z字扫描后的向量，输入时一个向量，运行程序后得到的是逆序向量(matrix performs zigzaging or inverse zigzaging)

由于Matlab R2012a 之后的版本中系统isrgb函数被移除了，特编此函数，用于判断图像是否为RGB格式。(To tell whether the image is the RGB format. )

utiliti applications

说明：  旋转不变性子空间（ESPRIT）类算法需要对阵列接收数据协方差矩阵进行特征分解。ESPRIT 类算法是利用接收数据协方差矩阵的信号子空间的旋转不变性，它利用各子阵的信号子空间之间的旋转不变性求出信号的入射角信息。(Rotation invariant subspace (ESPRIT) algorithms need to decompose the covariance matrix of array received data. ESPRIT algorithm is based on the rotation invariance of the signal subspace of the received data covariance matrix. It uses the rotation invariance between the signal subspaces of each subarray to obtain the incident angle information of the signal.)

说明：  产生正弦波、均匀白噪声、高斯白噪声图形；利用小波变换去噪并求信噪比。(Sine wave, uniform white noise and Gauss white noise are generated; wavelet transform is used to denoise and SNR is calculated.)