project3b

根据)EF 特性中的对比度敏感度， 即空间频率特性曲线，对图像进行二维多级小波分解，由分解后的各小波分量，提取各频段相应的亮 度、清晰度和相关度指标；然后将这三个指标的几何平均与频段加权系数的内积做算术平均，以此作 为图像质量的综合评价指标(According to) EF characteristic of contrast sensitivity, that is spatial frequency characteristic curve, the image is two-dimensional multi-level wavelet decomposition, the decomposition of the wavelet component, extract the frequency band corresponding brightness, clarity and relevance of indicators then the geometric mean of these three indices and the band doing weighted coefficient of the arithmetic mean within the product as a comprehensive evaluation of image quality index)

A ROBUST FORGERY IMAGE DETECTION

来自ptbdb数据库的信号的读取，该数据库内ECg信号的格式与传统的MIT-HIT数据库不同，是12导的数据，通过程序读取后，数据保存为Matlab矩阵的形式。(read ECG signal from the ptbdb database. Data form of this database is different from the tranditional "212" formal ECG signal. It returns ECG data of 12-leads in a matrix)

多个代码用作核密度估计器来计算log pdf 可以很容易地使用 学习目的(Multiple codes to be used as kernel density estimator to compute log pdf Can be used very easily Learning purpose)

三角形网格的划分，生成均匀网格，在delauney的基础上发展，实现区域网格的三角形剖分(Triangular mesh generation, uniform mesh generation, on the basis of delauney development, triangulation of regional mesh)

用matlab进行的有关无线传感器网络定位的研究(Carried out using matlab on the positioning of wireless sensor network research)

说明：  求误差函数的值（算法借鉴MATLAB中erf函数）(According the erf function in matlab program, get the value of ERROR function.)

this file is about band structure of 3d photonic crystal.in this program we use the pwe methode for calculation of band structure

对系统辨识中白噪声信号的加入影响的分析，并进行在线辨识。(Identification of the system by adding white noise analysis of the impact of )

说明：  迭代法 迭代式阈值选取的基本思路是:首先根据图像中物体的灰度分布情况， 选取一个近似阈值作为初始阈值(Iterative threshold selected basic idea is: First, the gray-scale distribution of objects in the image, select an approximate threshold as initial threshold)