moead

QR码作为一种可高速、全方位识别的二维条码,已经在各行各业中得到了应用,并具有很大发展潜力.本文针对QR码图像的识别过程中可能遇到的图像噪声干扰、QR码占实际拍摄图像的一部分、倾斜、几何失真等问题进行了研究,提出了通过改进型中值滤波去除噪声,使用QR码符号特性定位并对倾斜图像进行旋转,对失真不严重的图像采用控制点变换和双线性插值方法进行几何校正.实验证明, 本文的方法简单有效, 可以用于提高条码的正确识别率.(As a high-speed, full identification of the two-dimensional bar code, QR code has been applied in all walks of life, and also has great potential for development. In this paper, aiming at QR code image recognition process may be encountered in noise interference, QR code accounting for the actual captured image just a part, slant, geometric distortion, and other issues have been studied, put forward through improved median filter to remove noise, use QR code symbol characteristics to locate and rotate the tilted image, distortion which is not serious use control-point transform and spatial bilinear interpolation method for geometric correction. The results show that this method is simple and effective, can be used to improve the QR code correct recognition rate.)

说明：  采用10阵元的阵元间距为1/2波长的均匀线阵，估计两个不相干的信号源的波达方向。假设信号 源分别来自 和 方向，信噪比分别为10dB和20dB；并假设样本数为100。使用music算法实现DOA估计(music algorithm used for doa estimation)

MATLAB从入门到精通书中第四章例子的程序(MATLAB from the entry to the master' s program book example of the fourth chapter)

companding technique for papr

巴特沃斯和切比雪夫低、带通滤波器matlab程序，能播放、读取音乐，加噪，滤噪等。画出加噪前、加噪后、滤波后波形。(Butterworth and Chebyshev low, band-pass filter matlab procedures, can play music, reading, adding noise, filtering etc.. Before the addition of noise, plus noise, after the filter waveform.)

说明：  修正MUSIC算法实现相干信号源的DOA估计算法(amendment MUSIC algorithm coherent signal source DOA estimation algorithm)

分数阶FOURIER 有关的一些简单程序(FRACTIONAL FOURIER some simple procedures for the)

simulink应用实例，基于MATLAB6.5系列(Simulink application examples, based on a series of MATLAB6.5)

this is reference source for mfcc

Linear programming Interior Point Solvers