watermark综述+代码

提取视频中的图片，每一帧的信息，把视频分为图片信息(get picture of video)

matlab　ＰＣＡ源代码 有中文注释(source code matlab PCA has Chinese Notes)

说明：  SRM空间富模型隐写分析算法,选区高维特征，使用集成分类器进行训练(Spatial Rich Model Steganalysis Algorithms, Selection of High-Dimensional Features, Using Integrated Classifier for Training)

把一副画转化为由彩色字符（8个字符）组成的画。最简单、实用、绿色的软件！！！　　　　提供VB源代码！！！ (The grounds of color into a painting of characters (eight characters), composed of paintings. The most simple, practical, green software! ! ! VB source code provided! ! !)

实现了一个小球自由落体碰撞地面并弹跳的过程，设置了一个碰撞衰减系数c,可以自己调整衰减速度。(The process of collision and bounce of a small sphere falling freely on the ground is realized. A collision attenuation coefficient C is set to adjust the attenuation speed by itself.)

主成分分析 （ Principal Component Analysis ， PCA ）或者主元分析。是一种掌握事物主要矛盾的统计分析方法，它可以从多元事物中解析出主要影响因素，揭示事物的本质，简化复杂的问题。计算主成分的目的是将高维数据投影到较低维空间。给定 n 个变量的 m 个观察值，形成一个 n ′ m 的数据矩阵， n 通常比较大。对于一个由多个变量描述的复杂事物，人们难以认识，那么是否可以抓住事物主要方面进行重点分析呢？如果事物的主要方面刚好体现在几个主要变量上，我们只需要将这几个变量分离出来，进行详细分析。但是，在一般情况下，并不能直接找出这样的关键变量。这时我们可以用原有变量的线性组合来表示事物的主要方面， PCA 就是这样一种分析方法。(Principal component analysis (Principal Component Analysis, PCA) or PCA. Is a statistical method to grasp the principal contradiction of things, it can be resolved diverse things out the main factors, revealing the essence of things, simplifying complex problems. The purpose of calculating the main component of high-dimensional data is projected to a lower dimensional space. Given n variables of m observations, forming an n ' m of the data matrix, n is usually large. For a complex matters described by several variables, it is difficult to know, so if you can grab something to focus on key aspects of analysis? If the main aspects of things just reflected on several key variables, we only need to separate out these few variables, for detailed analysis. However, in general, does not directly identify this critical variables. Then we can represent the major aspects of things with a linear combination of the original variables, PCA is one such analysis.)

典型的LSB水印嵌入和提取算法，它是一个基本的matlab程序，可以帮助初学者入门 (typical LSB embedding and extraction algorithm, which is a basic Matlab procedures, Portal can help beginners)

图像二值化和电润湿像素单元开口率的计算，用于验证电润湿动力学模型是否正确(The calculation of the image two value and the rate of aperture of the electrowetting pixel unit is used to verify whether the electrowetting kinetic model is correct)

测量hall 效应 2182表侧电压，2400表加电流。。。。。。。。。。。。。。。(hall measurment 2182 measure voltage 2400 measure current......................................)

shanChen两相流LBM的c版源代码，参考shanChen.m修改的，希望对不太熟悉Matlab的有所帮助(c code of liquid-liquid flow of shanchen)