傅立叶变换是线性系统分析的一个有力工具，是信号处理中最重要、应用最广泛的变换，利用频域中特有的性质，可以使图像处理过程更加简单、有效，对于迂回解决图像处理中的难题非常有帮助，被广泛应用于数字图像处理中，-Fourier transform is a linear system analysis a powerful tool for signal processing are the most important and most widely used transform, the use of frequency domain-specific nature, can make image processing more easy, effective, solution for image processing circuitous The problem very helpful, are widely used in digital image processing,