对原图分别在频域内使用理想低通滤波器（选择任意截止频率）和理想高通滤波器（选择任意截止频率）和理想高通滤波器，再对其使用快速傅里叶变换，并输出修复后的图像的频率谱图。最后将高通滤波与低通滤波后的相加，输出，并与原图进行比较。-Respectively of the original image in the frequency domain using the ideal low-pass filter (choose an arbitrary cut-off frequency) and the ideal high-pass filter (choose an arbitrary cut-off frequency) and the ideal high-pass filter, and its use of fast Fourier transform, and output restored the image of the frequency spectrum. Finally, after the high pass filtering and low-pass filtering the summed output, and compares with the original image.