基于matlab的数字图像的二维傅立叶变换(FFT)以及二维离散余弦DCT变换，提供里详细代码，.m文件-Matlab-based digital image two-dimensional Fourier transform (FFT) and two-dimensional discrete cosine transform DCT offers in detailed code,. M file

对数字图像进行傅里叶变换，查看其频谱图及相位图。(Fourier transform of digital images, to see its spectrum and phase diagram.)