在数字图像处理中，对图像通过时域的快速傅立叶变换提取图像边缘的过程中，会出现噪声干扰，提取出一些对图像造成干扰的信息，使得提取效果较差。通过设计一个二维高斯滤波器降低噪声对边缘提取的干扰，从而得到较好的边缘提取效果。-In digital image processing, the image edge extraction process on the image through the fast Fourier transform of the time domain, there will be noise, to extract some interference caused to the image information, so that the extraction effect is poor. By designing a two-dimensional Gaussian filter to reduce noise interference on the edge extraction, whereby preferably the edge extraction.