An improved vector resolution noise removal approach
He Yinjuan1, Li Wen1,2, Liu Baojin1,2, Feng Shaoying1, Xin Hailiang1
1. Geophysical Exploration Center, China Earthquake Administration, Zhengzhou, Henan 450002, China;
2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
Abstract：Vector resolution, a typical angle-domain de-noising approach, uses the deviation angle between signal and noise to remove noise. We review briefly the vector resolution method and existing improved measures, and propose a new measure which uses curved time-window scheme according to its errors. The key point is to build a curved time-window based on the best time-shift values for maximum correlation coefficients between each trace and the center trace in the time window. Numerical simulation and real data de-noising test results show that the proposed method can better remove noise. We also perform real data tests with the proposed approach and frequency-domain de-noising methods such as pass-band filtering and wavelet threshold de-noising. The proposed approach gets better results event for seismic data in which signal and noise have very close frequency.
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