Information-Hiding-PNG

This is code for finding position of user. This code uses Kalman filter.

几何活动轮廓（GAC）算法的源代码，用upwind和eno数值方法， 在MATLAB下可直接执行(geometric active contour (GAC) algorithm source code, using upwind and eno numerical methods, MATLAB under the direct execution)

说明：  本程序适用于一阶超静定问题，是一种三赶简单问题.(This procedure applies to first-order indeterminate problems is a three time for simple questions.)

现代机械优化设计Matlab编程源代码及方框图(Modern mechanical optimization design Matlab programming source code and block diagram)

用matlab编写的程序，实现图像的3*3、7*7、9*9算术均值滤波和几何均值滤波，文档中有matlab源码以及运行结果截图(Programs written with matlab, image 3* 3,7* 7,9* 9 arithmetic mean filter and geometric mean filter, documentation and operating results have matlab source screenshot)

一维光子晶体缺陷层位置对带隙的影响，层厚度为1/4个波长，选择不同的缺陷层位置(Effect of one-dimensional photonic crystal defect layer position on the band gap )

说明：  三个复正弦信号的信噪比分别为SNR1 =30dB， SNR2 =30dB和SNR3 = 27dB。假设信号样本数为1000，FIR 滤波器的抽头个数为4。基于奇异值分解的MVDR 方法进行信号频率估计的仿真实验，获得功率谱密度函数的估计。(A power spectrum estimation algorithm named mvdr is introduced in this program)

说明：  这是一种不错的牛顿算法，是老外编的，大家看看吧～(This is a good Newton algorithm, is a foreigner series, we look at it ~)

说明：  transformations géométriques

Matlab6.0图形图像处理函数。pdf。非源码Matlab6.0 graphics and image processing functions. pdf. Non-source(Matlab6.0 graphics and image processing functions. pdf. Non-source)