短时傅里叶变换的一些简单的演示，其中有矩形窗和高斯窗-some demos for the short time fourier transform

A novel texture-based Automatic Fingerprint Authentication System (AFAS) is proposed. A fingerprint image is preprocessed to enhance the image by Short Time Fourier Transform (STFT) analysis. Then, three sets of invariant moment features, as a kind o

在MATLAB环境中，得到语音信号的散点图，STFT变换和小波包变换。-In the MATLAB environment to obtain a scatter plot of the speech signal, STFT transform and wavelet packet transform.