Image-Denoising_NLmeans

雷达系统信号处理仿真，产生多假目标并进行干扰(Simulation of radar signal processing to produce multiple false targets and interference)

能够非常有效地在比较大的干扰下比较准确地反映真实值，如果观测端加入干扰较大时，卡尔曼滤波器能够较为有效地进行滤波，不过当状态端的干扰增大时，卡尔曼滤波器的滤波效果也会随之下降。(Can very effectively in the relatively large disturbances under more accurately reflect the true value, if the observation end joining interference is large, Calman filter can effectively filter, but when increasing the jamming state end when the filter effect of Calman filters will fall.)

Fixed-Point iteration(Function fixed_point(p0, N) approximates the solution of an equation f(x) = 0, rewritten in the form x = g(x), which is a sub-function the user has to enter. the call to the function fixed_point(p0, N) returns the root of the equation f(x),i.e. the fixed-point of g(x), if the procedure is successful or a sequence of iterates in case something goes wrong. p0 is the initial approximation and N the maximum number of iterations. If, after N iterations, condition |x(k)- x(k-1)| < tol is not satisfied, all iterated values will be displayed, accompanied by a message asking the user to either change p0 in case of divergence or enter another g(x) that does not lead to complex numbers arithmetics. Reasons for the program to go wrong are the divergence of iterates and/or appearance of complex numbers for example with functions involving sqrt(x) when one of the iterates is negative. )

matlab语言编写 新三步搜索算法 ，希望大家有用(New Three Step Search Algorithm)

原理：乘同余法产生随机数来生成均匀分布、瑞利分布、正态分布，压缩包包括3个分布的Matlab源代码(Principle: multiplicative congruential method to generate random numbers to generate uniformly distributed ，Rayleigh distribution and normal distribution.This package includes three distribution of Matlab source code.)

Drulhe S. - Hue M. -- dec 2003 Demo to compute the histogram features. Some functions used here require Image Processing Toolbox (Drulhe S.- Hue M. -- dec 2003 Demo to compute the histogram features. Some functions used here require Image Processing Toolbox )

说明：  这是一篇关于cmos锁相环频率合成器的文章(this is an article of cmos pll)

ART1算法,此算法还存在缺陷,有此产生art2 (ART1 algorithm, the algorithm also flawed, produce art2)

在数字信号处理中使用的matlab的代码，非常实用(Used in digital signal processing matlab code, very useful)

采用四元数算法，来确定飞行器的姿态状况，同时通过PID方法，调节飞行器的飞行姿态。(Quaternion algorithm to determine the status of the aircraft s attitude, but by PID method, adjusting aircraft flight attitude.)