在数字图像处理中，常常会遇到图像中混杂有许多的噪声。因此，在进行图像处理中，有时要先进行祛除噪声的工作。最常用的祛除噪声的方法是用滤波器进行滤波处理。MATLAB的图像处理工具箱里也设计了许多的滤波器。如均值滤波器、中值滤波器、维纳滤波器等。用户可以很方便的运用一些函数完成数字滤波工作。-In digital image processing, the image often encounter mixed with a lot of noise. Therefore, when the image processing, and sometimes the work to conduct eliminate noise. The most commonly used method is to remove the filter for noise filtering. MATLAB image processing toolbox also designed many of the filters. If the mean filter, median filter, Wiener filters. Users can easily use some digital filtering function completes the work.