GeoMethod

说明：  ：针对MP3 编码方式和帧结构进行分析，利用帧中的比例因子提出了一种压缩域水印算法。算法通过引入帧变化分析步 骤，很好地实现了水印的自适应嵌入。对于不同的系统要求，还可以通过修改门限信噪比的值SNRlim按需进行水印嵌入，使算法 具有更大灵活性。同时在牺牲一定的嵌入空间前提下，实现了水印信息的自同步。实验表明，对于不同风格的音乐，该水印算法 具有很好的不可听性。(In this paper，the encoding method and the frame structure of MP3 are expounded in detail，a watermark algorithm is proposed based on the scale factor in MP3 frame.By introducing the step of frame altering analysis，the algorithm can realize that watermarks is embedded adaptively.By modifying threshold SNRlim（the ratio of signal to noise），the algorithm can meet different requirements of some system，that is what enable the algorithm to have a bigger flexibility.Based on expense of some embedding positions，the watermark can be embedded with self-synchronization.The experiment results show this algorithm can get a good audio effect with various types of audio.)

used to perform edge detection using prewitt operator without using edge function

Smart antenna with matlab in wireless communication

高斯积分matlab实现的介绍以及其源码(Gaussian integral matlab introduction to achieve, as well as its source)

本文件给出了科学计算所涉及的常用问题的源程序，同时给出了一些例题，适应初学Matlab者。(This document gives the commonly used scientific computing problems involved in source code, and gives some examples, those who meet the novice Matlab.)

自己编写的MATLAB函数，实现对图像的旋转。B是原图像，灰度或彩色，alpha是旋转角度（角度或弧度单位均可），A是旋转后图像。旋转后图像信息尽可能不损失。(I have written MATLAB function, to achieve image rotation. B is the original image, grayscale or color, alpha is the angle of rotation (degrees or radians per unit), A is rotated images. Rotation after the image information as possible without loss.)

Marr Hildreth Edge Detector

可以用一系列点拟合二次函数，得出拟合后的图形和原数据的图标(Two functions can be fitted with a series of points)

generate simple random fractals recursively

说明：  ＢＰＳＫ　检测其在加性高斯白噪声信道中的性能　it is useful for you!(BPSK detected in the additive white Gaussian noise channels the performance it is useful for you!)