摘要
针对传统多级中值滤波在所能保护的线特征方向上的不足,提出了一种基于方向的自适应多级中值滤波方法。该方法通过对小窗口内线特征走向的判断在大的窗口中选择不同的多级中值滤波方式,使滤波子窗口方向与线特征走向相一致。实验证明与传统的多级中值滤波相比,该方法能够在各个方向上更好地保留图像地线特征,同时与传统的多级中值滤波一样能够有效抑制噪声。
An adaptive multistage median filtering based on direction was presented in terms of traditional method＇s disadvantage in directions of protected lines. This method estimates a line＇s direction through a small rectangle window and then chooses a proper filtering mode in a larger one, which makes a sub-window have the identical direction with line. Computer experiments have showed its advantages over traditional multistage median filtering in preserving an image＇s edges in each direction more effectively, and the same effective ability to smooth noise.
出处
《通信学报》
EI
CSCD
北大核心
2006年第4期119-123,共5页
Journal on Communications
关键词
多级中值滤波
去噪
线特征
非线性滤波
multistage median filtering
denoising
line feature
nonlinear filtering
