PID_4

Matlab source code for DCT-based watermarking for grayscale images. DCT-based watermark recovering without resorting to the uncorrupted original image. Digital watermarking has been proposed as a viable solution to the need of copyright protection and authentication of multimedia data in a networked environment, since it makes possible to identify the author, owner, distributor or authorized consumer of a document. A new watermarking technique to add a code to digital images is presented: the method operates in the frequency domain embedding a pseudo-random sequence of real numbers in a selected set of DCT coefficients. Watermark casting is performed by exploiting the masking characteristics of the Human Visual System, to ensure watermark invisibility. The embedded sequence is extracted without resorting to the original image, so that the proposed technique represents a major improvement to methods relying on the comparison between the watermarked and original images.

使用Matlab仿真QAM和M=4的PSK(Matlab simulation using QAM and M = 4 of the PSK)

说明：  matlab数学形态学处理里面，一维信号的膨胀腐蚀等没有现成的公式，编程为解决一维信号的处理问题。(inside matlab mathematical morphology, the expansion of one-dimensional signal no ready formula for corrosion, programming to address the problem of one-dimensional signal processing.)

说明：  基于全格式线性化的无模型自适应控制系统程序，效果相当好！(compact form dynamic linearization modeal free adaptive control)

《matlab及在电子信息课程中的应用》的源码程序；程序中包含基础的语法和应用实例，还包含高级程序应用,里面包含了近18个EXAMPLE文件。适合学习matlab的初级学者。("Matlab courses and in the electronic information in the application" of the source program program includes basic syntax and application examples, also includes an advanced application procedures. Suitable for junior scholars to learn matlab.)

FFT_ by Matlab_Sound1

产生周期矩形信号的matlab源程序，希望对大家有帮助(Produce periodic rectangular signal matlab source, we want to help)

. The 8-puzzle problem is a puzzle invented and popularized by Noyes Palmer Chapman in the 1870s. It is played on a 3-by-3 grid with 8 square blocks labeled 1 through 8 and a blank square. Your goal is to rearrange the blocks so that they are in order. You are permitted to slide blocks horizontally or vertically into the blank square. The following shows a sequence of legal moves from an initial board position (left) to the goal position (right).

说明：  matlab 程序，可用于地震正演模拟中的震源，数据处理等(Ricker wavelet,seismic modeling)

最小二乘算法相关，自适应波束形成，最小均方算法。(Related least squares algorithm, adaptive beamforming, least mean square algorithm.)