拟线性噪声的形态滤波方法研究

Morphological filtering method for quasi linear noise

局部弯曲和不同斜率的拟直线噪声去除是数字信号处理领域的难点,在地震信号处理领域尤为突出。采用了形态学对拟线性噪声进行压制处理技术,设计了形态学滤波器,将有效信号和拟线性噪声分离。给出了形态滤波去噪方法的原理和详细过程,在仿真中通过与均值和中值滤波结果的对比,证实了该方法的有效性。该方法恢复了信号与噪声重叠处的有效信号,具有良好的振幅保持特性,在数字信号处理领域具有很好的应用前景。

The removal of quasi linear noise with different slopes and local bendings is one of the difficulties in the field of digital signal processing,particularly in seismic signal processing. In this paper,the morphological noise suppression technique is used to deal with the quasi linear noise,and the morphological filter is designed to separate the effective signal and the quasi linear noise. The principle and the detailed process of the morphological filtering denoising method are given,and the validity of the method is verified by comparing with the results of mean and median filtering. The proposed method is effective in restoring the signal and noise overlap, and has very good amplitude preservation characteristics. It has a good application prospect in the digital signal processing field.