dft-and-lattice

在很多图像处理的过程中，需要判别一个图像的清晰度，和图像分割结果的优劣，于是就引出了信息熵的概念，绝大多数时候，它都被用来作为评价图像的一个量化标准。(In many image processing processes, it is necessary to distinguish the clarity of an image and the result of image segmentation, so the concept of information entropy is introduced. Most of the time, it is used as a quantitative standard to evaluate the image.)

calculate minkowski distance

基于 DCT(离散余弦变换 )域的信息隐藏算法是目前应用最广的变换域算法 ,此类算法的最大不足是嵌信息量小。通过分析 DCT域隐藏算法隐藏容量少的原因 ,提出了一种大容量的 DCT域信息隐藏算法。算法首先对载体图像进行频谱均匀化处理 ,然后对图像进行全局 DCT变换 ,并将隐藏信息嵌入到载体图像的低频 DCT系数上 ,信息嵌入采用分段量化的方法实现 ,提取隐藏信息时不需要原始载体图像。实验结果表明 ,该算法的嵌入容量大 ,不可感知性好。(Based on DCT (discrete cosine transform) domain information hiding algorithm is the most widely used transform domain algorithms, the largest of these algorithms is the lack of a small amount of information embedded. Hiding Algorithm for DCT domain by analyzing the hidden reasons for the low capacity, a large capacity of information hiding algorithm for DCT domain. Firstly, the spectrum of the carrier image homogenization, and then the image is a global DCT transformation, and hidden information embedded into the image of the low-frequency DCT coefficients, the information embedded in the methods used to achieve sub-quantization, extract hidden information without the original Vector image. Experimental results show that the algorithm embedding capacity, can not be perceived good.)

实现Nakagami信道仿真,用在无线传输信道中(Achieve Nakagami channel simulation, using the wireless transmission channel)

use estimate maximization to calculate maximization of equation

说明：  图像变换 matlab语言编辑 包括灰度、旋转、放大、镜像(Image transformation)

GPS 多天线系统的姿态确定，matlab工具箱(A MATLAB toolbox for attitude determination with GPS multi-antenna systems)

利用Matlab分别生成OFDM信号和短波信道仿真器(OFDM signals and shortwave channel simulators are generated using Matlab respectively)

说明：  使用matlabR2007a编写的分类回归树代码，已经调试，可以运行(Prepared using matlabR2007a code classification and regression trees have been debugging, you can run)

可以用来进行地震预测的matlab代码，直接模仿就可以用了(Can be used for earthquake prediction matlab code, you can use a direct imitation)