噪声处理是数字图像处理中的重要环节。文中介绍了常见的图像噪声，讨论了均值滤波、中值滤波、维纳滤波三种用于图像去噪的典型算法，并进行了分析比较，最后得出了三种方法各自的适用性特点。-The noise processing is an important part of the digital image processing. This paper introduces the common image noise, to discuss the mean filtering, median filtering, Wiener filter, three typical algorithms for image denoising, and were analyzed and compared, the conclusion that the applicability of the characteristics of the three methods.