关键词: 六边形窗口, 自适应窗口, 均值滤波, 椒盐噪声

Abstract: The weighted average filtering algorithm has good filtering effect to the image  polluted by the salt-and-pepper noise, but there is a number of factors that influence the effect of this algorithm, for example choosing different filtering window has greater difference on the effect of filter. In this paper, there is a kind of adaptive hexagon window whose pixels in a horizontal direction are more than vertical direction, so the impact is different on the horizontal and vertical direction in the filtering process. The experimental results show that the filtering effect is better than general window to the image that has stronger pixel correlation on the level direction（or vertical direction）.

Key words: hexagon window, adaptive windows, mean filter, salt-and-pepper noise