说明：  * FFT() - 快速付立叶变换 * IFFT() - 快速付立叶反变换 * DCT() - 离散余弦变换 * WALSH() - 沃尔什－哈达玛变换 * * Fourier() - 图像的付立叶变换 * DIBDct() - 图像的离散余弦变换 * DIBWalsh() - 图像的沃尔什－哈达玛变换
(* FFT ()- Fast Fourier Transform* IFFT ()- Fast Fourier Transform* DCT ()- Discrete Cosine Transform* WALSH ()- Walsh- Hadamard Transform** Fourier ()- image of pay Fourier Transform* DIBDct ()- image of discrete cosine transform* DIBWalsh ()- image of Walsh- Hadamard Transform)