基于小波变换阈值方法的地震信号去噪研究

Study of Seismic Signal Denoising Based on Wavelet Transform Threshold Method

提高地震信号的信噪比,对地震勘探数据的处理具有非常重大的意义。小波变换能把信号分解在多个尺度上,不同尺度上的小波变换系数代表原信号在不同分辨率上的信息。地震能量主要集中在信号的低频段,利用信号在不同的尺度上进行小波分解,可以进行地震信号的去噪处理。

Improving the signal to noise ratio of the seismic signals has great significance for data processing of seismic exploration. The wavelet transform is able to decompose the signal on multiple scales. The wavelet transform coefficient of different scales represent the information at certain resolutions. The seismic energy concentrates mainly on the section of lower frequencies. Thus the seismic signal may be denoised by its decomposition on multiple scales.