The simulation results show the proposed method can effectively filter the impulse noise and deduce the negative impact on image smoothing by the median filter.
并通过仿真说明该算法能够比较好的滤除冲激噪声和减小中值滤波对图像引入的平滑效应；
The experiment results show that this method is able to achieve a good effect in the respect of noise removal and edge preservation during the process of image smoothing.
实验结果表明，在图像平滑的过程中，该方法在噪声消除和边缘保留方面能获得较好的效果。
Directional smoothing filter is frequently used in digital image processing for it has the double properties of noise filtering and edge preserving.
方向平滑滤波器兼有去噪和边缘保持的双重特性，在数字图像预处理中被经常采用。
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