用JAVA语言实现的一个数字图像的傅立叶变换和离散余弦变换。用到了傅立叶变换的快速算法FFT和离散余弦变换DCT。 -JAVA programming language to achieve a digital image of the Fourier transform and discrete cosine transform. Use of the Fourier transform, fast algorithm FFT and discrete cosine transform D