是一个数字图像处理的示例程序，将一个图像进行2维傅里叶变换，然后进行巴特沃斯高通和低通滤波。-Digital image processing is an example of a program, a two-dimensional Fourier transform of the image, and then Butterworth high-pass and low-pass filtering.

用前馈神经网络对数字图像进行去噪，最终效果去噪良好，能够清晰显现原图像。-With feedforward neural networks for digital image denoising, denoising good final results, we can clearly show the original image.