xiaolizi.zp

针对高精度的畸变图像,提出了一种基于最小二乘影像匹配的高精度畸变图像矫正算 法. 算法首先利用特征提取与边缘检测对图像进行预处理,并且将特征匹配与最小二乘算法相 结合,从而实现了图像与模板之间精确的子像素定位与匹配. 实验表明,该算法较好的解决了目前高精度畸变图像矫正算法中普遍存在的定位和匹配精度较差的缺陷,图像矫正效果良好,是一种有效的畸变图像矫正算法.(Image distortion for high-precision, a least-squares image matching based on high-precision image distortion correction algorithm. First of all, the use of feature extraction algorithm for edge detection and image pre-processing, and will feature matching with a combination of least-squares algorithm in order to achieve the image and the template between the sub-pixel accurate positioning and matching. The experimental results show that the algorithm has better accuracy of the solution to the current distortion prevalent image correction algorithm to match the accuracy of the positioning and less defects, image correction effect well, is an effective algorithm to correct image distortion.)

lorenz_lyapunov 用于混沌动力学的计算(lorenz_lyapunov used for the calculation of chaotic dynamics)

this method is called the maximum likelihood estimation method .which is used to find out the parameters of johnson distribution .

说明：  这是一个工具，使用MATLAB代码为一个由阿尔伯塔大学的Siting Liu开发的硬件Sobol序列生成器生成VHDL文件。(This is a tool that uses MATLAB code to generate VHDL files for a hardware Sobol sequence generator developed by Siting Liu at the University of Alberta.)

SPEECH ADAPTIVE COMPRESSION USING COSINE PACKETS code

polydern: partial derivatives of a n-dimensional polynomial model created by polyfitn. usage: pout = polydern(p,diffvar)

说明：  利用prony算法提取信号的幅值、频率和衰减因子，删除了mathworks工具包中的bug(The Prony algorithm is used to extract the amplitude, frequency and attenuation factor of the signal, and the bugs in the MathWorks toolkit are deleted.)

Pressure distribution in a journal bearing

说明：  这个程序可以产生一个6阶的低通巴特沃思滤波器，截止频率是45Hz，你也可以用它来对信号进行滤波，并比较滤波前后的信号功率谱。(This program can generate a six-order low-pass Butterworth filter, cut-off frequency is 45Hz, you can also use it to filter the signal and to compare before and after filtering the signal power spectrum.)

这两个小程序是matlab的.m文件，06为采用二维中值滤波函数medfilt2对受椒盐噪声干扰的图像滤波，07采用matlab中的函数filter2对受噪声干扰的图像进行均值滤波。(these two small procedure is Matlab. M documents, 06 for 2D median filtering function medfilt2 right by the Salt and Pepper image noise filtering, 07 using Matlab filter2 the function of noise interference by the image filtering.)