关键词: 十字窗口, 自适应中值滤波, 复杂度, 数字图像处理

Abstract: The traditional median filters denoising while tending to alter pixels undisturbed by noise,as well as without meeting the demand of real-time image preprocessing,so a fast adaptive median filter based on crossing windows is proposed in this paper.It makes full use of the relative information of adjacent windows and its low complexity,which result in filtering more quickly,and changes window size according to noise density to enhance noise-reduction effects.The simulation results show that this method can not only reduce more impulse noise,and keep more fine details unchanged but also reduce the complexity of traditional median filter algorithm from O（D²） to O（D）,its result turns out to be more satisfactory.

Key words: crossing window, adaptive median filter, complexity, digital image processing