FDTD3D

利用DCT进行图像压缩（首先将图像分割成8×8的图像，对每个子图像进行DCT，这样每个子图像有64个系数，舍去50％小的变换系数，进行2：1的压缩。）(Using DCT for image compression (first image into 8 × 8 image, for each sub-image DCT, so that each sub-image by a factor of 64, rounding 50 of the small transform coefficients, the 2:1 compression.))

程序产生了基于FFT变换下的OFDM信号，子载波采用QAM信号，码元宽度和载波数量可调(OFDm signal)

用角谱法计算菲涅尔衍射图样，计算出后加上GS算法即可得出全息图(Fresnel diffraction pattern is calculated using the angular spectrum method, after adding GS algorithm to calculate the hologram can be derived)

基于matlab的低通有源滤波器设计wp=30hz，ws=40hz，rp=0.5，rs=40，fs=100hz. (Matlab-based low-pass active filter design wp = 30hz, ws = 40hz, rp = 0.5, rs = 40, fs = 100hz.)

matlab code for analog filter

特征提取算法 一篇经典的英文文献 介绍了一种新的算法 模式识别(Feature extraction algorithm，a classic English literature describes a new algorithm for pattern recognition)

matlab的函数列表，主要针对数字图像处理方面的应用。列出了函数名，基本功能和基本调用形式。(matlab function list, mainly for the application of digital image processing. Lists the function name, the basic functions and basic call form.)

this prog is to choose the nearest neibour

计算互信息，通过状态转移概率和分支度量进行前向递推(calculate the mutual information)

Iris detection with Hough transform