基于压缩感知的OMP算法在地震资料中的去噪效果分析  

Effect of OMP algorithm based on compressed sensing in seismic data denoising

作　　者：贺月 周健 陈力鑫 黄劲 王丽红 HE Yue;ZHOU Jian;CHEN Li-xin;HUANG;Jin;WANG Li-hong(School of Geophysics,Chengdu University of Technology,Chengdu Sichuan 610059,China)

机构地区：[1]成都理工大学地球物理学院,四川成都610059

出　　处：《油气地球物理》2020年第2期92-95,共4页Petroleum Geophysics

摘　　要：基于压缩感知理论的OMP算法应用于地震资料的噪声压制,以提高地震资料信噪比。首先对含噪的非平稳信号在小波变换域内稀疏表示,以小波变换作为变换基,用随机高斯矩阵为测量矩阵计算传感矩阵,再运用OMP算法的快速收敛性进行信号重构。模型和实际数据处理结果表明,该方法对地震数据中的随机噪声压制效果明显,有效地提高了地震资料信噪比。To improve the signal-to-noise ratio of seismic data,the OMP algorithm based on compression sensing theory is applied to noise suppression of seismic data.Firstly,the sparse representation of noisy non-stationary signals is carried out,the wavelet transform is used as the transform basis,and the random Gaussian matrix is used as the measurement matrix to calculate the sensing matrix.Then the fast convergence of OMP algorithm is used to reconstruct the signal.The results of the model and actual data processing show that the method has obvious suppression effect on random noise in seismic data,and the signal-to-noise ratio of seismic data is effectively improved.

关 键 词：压缩感知 信号重构 噪声压制 去噪效果 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]