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it is a filter called midian filter

these programs includes sorce codes

采用Matlab下fread函数读取高光谱BIL文件数据(Using Matlab fread function to read hyperspectral BIL file data)

基于主分量分析的图像融合算法实现，matlab实现，直接输入两幅图像即可(PCA-based image fusion algorithm, matlab implementation, two images can be directly)

说明：  主要用于近红外光谱处理中光谱特征选择，是目前近红外光谱数据处理的重要方法之一。(Successive Projections Algorithm for NIR data analysis)

matlab simulink使用简介，入门介绍(matlab simulink)

计算卫星位置的fortran程序，用切比雪夫内插任意时刻的三位坐标,精度课达mm级别。内有数据课进行对比验证，内容讲解的不是很详细请原谅。(Calculation of satellite position fortran program Chebyshev interpolation at any time of the three coordinates, accuracy up to mm-level classes. There are data comparing class verification, the content does not explain in great detail please forgive me.)

LZ compression LZ decompression

根据干扰信号波形样式的不同，压制性干扰可分为噪声调幅干扰、噪声调频干扰、噪声调相干扰。就是用噪声或类似噪声的干扰信号遮盖或淹没有用信号，阻止雷达检测目标信息。它的基本原理是：任何一部雷达都有外部噪声和内部噪声，雷达对目标的检测是在这些噪声中进行的，其检测又是基于一定的概率准则的。一般来说，如果目标信号能量S与噪声能量N相比（信噪比S/N），超过检测门限D，则可以保证一定的虚警概率Pfa的条件下达到可检测目标回波所要求的检测概率Pd，简称为可发现目标，否则便称为不可发现目标。(Blanket Jamming can be divided into different styles according to the interference signal waveform, noise AM interference, noise FM jamming noise phase modulation interference. With noise or noise-like interference signal covered or submerged useful signal prevent radar detection target information from. Its basic principle is: any one radar has the external noise and the internal noise of the radar target detection in these noise detection is based on a certain probability criterion. Generally, compared to if the target signal energy S and noise energy N (signal-to-noise ratio S/N), more than the detection threshold D, you can guarantee reach target echo can be detected under the conditions of a certain false alarm probability Pfa requirements detection probability Pd, referred to can be found in the target, otherwise known as not finding the target.)

能够实现三相离散电压电流的瞬时有功、无功功率计算以及绘制。(It can realize instantaneous active and reactive power calculation and drawing of three-phase discrete voltage and current.)