simulation

matlab处理指纹图像，由于指纹的唯一性、可靠性和稳定性，指纹已成为身份识别和鉴定的一个重 要标志，并被公认为“物证之首”。指纹识别作为一种生物识别技术，历来受到人们的广泛关注和重视，是未来个人身份认证的重要组成部分。(Fingerprint image processing matlab，Because the uniqueness of fingerprints, reliability and stability,fingerprint identification has become an important symbol of appraisal,and is recognized as the "first" material.The fingerprint identified as a kind of biometrics,has received extensive attention of,the individual identity authentication is the important component.Based on the MATLAB software applications for tools,for fingerprint image preprocessing and feature extraction technology research.Including pretreatment part involves by different methods of fingerprint image segmentation to extract valid area,with the improvement of OPTA thinning algorithm for thinning, )

A database of facial expression images was collected. Ten expressors posed 3 or 4 examples of each of the six basic facial expressions (happiness, sadness, surprise, anger, disgust, fear) [4] and a neutral face for a total of 219 images of facial expressions.

matlab的sift算法实现图像检索 (sift the matlab image retri algorithm)

说明：  数值分析实验，里面是word格式的，便于复制(Numerical experiment, which is the word format for easy copying)

本文件为用matlab编写的遗传算法程序，内容较为全面，好不易得才找到的。(This document is prepared for the use of genetic algorithm matlab procedures, content more comprehensive, so it was difficult to find.)

本程序直接摘自文献： ％ S. K. Mitra. Digital Signal Processing: A Computer-Based Approach. Second Edition, ％ McGraw-Hill,2001 清华大学出版社，2001(directly extracted from the literature : S. K. Mitra%. Digital Signal Processing : A Computer-Based Approach. Second Edition. % McGraw-Hill, 2001 Tsinghua University Press, 2001)

例4：在sinc(t)信号中叠加噪声，分析对应频谱 fs=100 采样频率,必须大于两倍基带信号最高频率 ts=1/fs 采样时间间隔 T=2 时间窗大小 ( x=x+0.1*randn(1,N) x=awgn(x,-10, measured ) figure plot(t,x) title( 时域信号图 ) xlabel( t /s ) y=fft(x,N) figure if mod(N,2)~=0 N=N-1 end f=linspace(0,fs/2,N/2) plot(f,abs(y(1:N/2))*2/N) title( 叠加噪声的sinc(t)信号频谱 ) xlabel( f /Hz ) figure y0=y(1:N/2) P=y0.*conj(y0)/N P=10*log10(P) plot(f,P) title( 功率谱 ) xlabel( f /Hz ) )

Matlab中Jepg压缩算法的实现，可以直接运行，亲测！(Matlab in Jepg compression algorithm can be run directly, pro-test!)

audio card enumerate searching ok. for multimedia developing project. thank you

去趋势波动分析，用于信号分析，可以用于信号去噪，检测信号序列的相关性，内有源码及参考资料一篇(DFA analysis is used to analysis the signal.besides,it can also be used to test the conssitency of the input signal series.)