detcoef2 提取二微小波分解高频系数 appcoef2 提取二维小波分解低频系数 wthresh 进行软阈值或硬阈值处理 wthcoef2 二维信号的小波系数阈值处理 ddencmp 获取在消噪或压缩过程中的默认值阈值-detcoef2 from two high-frequency micro-wave decomposition coefficient appcoef2 extract 2D wavelet decomposition low-frequency coefficient

对一个不对称的实序列进行傅里叶分析，将信号分解为奇部和偶部，求出对应的傅里叶变化-Implementation of an asymmetric sequence Fourier analysis, the signal is decomposed into odd and even the Department of the Ministry, find the corresponding Fourier transform