7.1 概述 7.2 边缘检测 7.3 边缘跟踪 4.1 概述 4.2 空域变换增强 4.3 空域滤波增强 4.4 频域增强 4.5 彩色增强 -7.2 Edge Detection 7.1 overview 7.3 Edge tracking 4.1 4.2 Enhanced 4.3 airspace airspace transform filter to enhance the frequency domain 4.4 Enhanced Color Enha

利用频域滤波消除周期噪声，即用频域带阻滤波器消除图像中的周期噪声。-By using the frequency domain filtering eliminating cycle noise, use frequency domain band-stop filter to eliminate image noise of the cycle.

1． 用Fourier变换算法对图像作二维Fourier变换。 2． 用Fourier反变换算法对图像作二维Fourier反变换。 3． 频域逆滤波和维纳滤波图像复原。 -1. Fourier Transform algorithm for the two-dimensional Fourier transform image. 2. Fourier transform algorithm with anti-dimensional Fourier inverse transfo