1、 读取图像A和B，显示这两幅图像，对图像作傅立叶变换，显示频域振幅图像。作傅立叶逆变换，显示图像，看是否与原图像相同。



2、 设计一个简单的巴特沃斯低通滤波器（截止频率自选），对图像A作频域低通滤波，



再作反变换，观察两种不同的截止频率下反变换后的图像与原图像的区别。



3、 设计一个高斯高通滤波器（截止频率自选），对图像B作高频强调滤波，再作反变



换，观察两种不同的截止频率下反变换后的图像与原图像的区别.-1, the read image A and B, show two images, the Fourier transform of the image, display the amplitude of the frequency domain image. Inverse Fourier transform for the display image, to see if the same original image. 2, the design of a simple Butterworth low-pass filter (cutoff frequency selectable), the image A low-pass filter for the frequency domain, and then make the inverse transform, under two different cutoff frequencies observed inverse transform the image and the original image difference. 3, the design of a high-pass Gaussian filter (cutoff frequency optional), the high frequency emphasis filter for the image B, and then make the inverse transform, the difference image and the original image is observed under two different cutoff frequency inverse transformed.