基于方向信息测度的自适应多级中值滤波器

ADAPTIVE MULTILEVEL MEDIAN FILTER BASED ON DIRECTION INFORMATION MEASURE

针对图像滤噪中滤除噪声和保护细节(边缘)的矛盾,本文提出一种新的基于方向信息测度的自适应多级中值滤波器。方向性是边缘和噪声的本质区别之一,通过基于方向信息测度所构造的自适应结构,决定中值滤波器的形式和滤波窗口尺寸的大小,而不需要图像和噪声的先验知识。文章比较了标准中值滤波器、单向多级中值滤波器、双向多级中值滤波器和本文方法的结果。实验表明本文方法具有更好的效果。

This paper presents a new adaptive multilevel median filter based on direction information measure to solve the contradiction between noise attenuation and image details-preserving (edge-preserving). Direction is one of nature distinctions between noise and edge, and an adaptive algorithm based on direction information measure is constructed to decide the format and size of median filter without any knowledge of image and noise. A comparison of median filter, single direction multilevel filter, bidkection multilevel filter and the method in this paper has been done. The result indicates that the method has better effectiveness.