matlab100

在傅立叶变换光学中夫琅和费衍射场的强度分布就等于屏函数的功率谱。因此我们可以直接将光屏进行傅立叶变换，再处理得到衍射图样。(In the Fourier transform optics, Fraunhofer diffraction field intensity distribution is equivalent to the power spectrum display function. Therefore, we can directly Guangping Fourier transform, and then to handle any diffraction pattern.)

说明：  Lowe2004年发表于IJCV的关于SIFT算法的经典论文(Lowe2004 published in IJCV' s classic paper on the SIFT algorithm)

ofdm with pilot information

A New Image Filter for Impulsive Noise Based on Rough Sets

Matlab的简单实用方法，能让初学者很快的了解Matlab、实用Matlab(Matlab s simple and practical method that allows beginners to quickly learn Matlab, Matlab practical)

传统的短时谱估计语音增强算法通常假设语音谱分量相互独立，没有考虑语音谱分量间的相关性。针对这 一问题，该文提出一种新的基于多元Laplace分布模型的短时谱估计算法。首先，假设语音的离散余弦变换(DCT) 系数服从多元Laplace分布，以此利用谱分量间的相关性；在此基础上，利用多元随机矢量的高斯尺度混合模型表 示，推导得到语音DCT系数矢量的最小均方误差(MMSE)估计的解析表达式；并进一步推导了基于该分布模型的 语音存在概率，对最小均方误差估计子进行修正。实验结果表明，该算法在抑制背景噪声和减少语音失真等方面优 于传统的语音增强方法。(The spectral components of speech are usually assumed to be independent in traditional short-time spectrum estimation, which is not the case in practice. Tosolve this problem, a new speech enhancement algorithm with multivariate Laplace speech model is proposed in this paper. Firstly, the speech Discrete Cosine Transform (DCT) coefficients are modeled by a multivariate Laplace distribution, so the correlations between speech spectral components can be exploited. And then a Minimum-Mean-Square-Error (MMSE) estimator based on the proposed model is derived using a Gaussian scale mixture representation of random vectors. Furthermore, the speech presence uncertainty with the new model is derived to modify the MMSE estimator. Experimental results show that the developed method has better noise suppression performance and lower speech distortion compared to the traditional speech enhancement method. )

speech ceps pitch detection

说明：  简单的实现了weiner滤波的功能，可以用于信号处理，可以用(Simple implementation of the weiner filtering function can be used for signal processing)

msk一种恒包络信号，本源码用多种方案实现MSK信号的调制和解调(msk a constant envelope signal, the source with a variety of programs to achieve the modulation and demodulation of MSK)

eigvec Eigenvectors and their geometric multiplicity.