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Next: Acknowledgments Up: Xue et al.: FWI Previous: Noisy data test

Conclusions

With the observation that velocity models with planar structures appear sparse in the seislet domain, we introduce a sparsity regularization scheme with seislet transform to improve the robustness of FWI and to recover a noise-free, geologically-consistent velocity model. We implement this seislet regularization by imposing soft thresholding on the updated model in the seislet domain at each iteration. We estimate the dip needed by the seislet transform from the migration image generated during the iterative inversion. Two numerical tests verify the effectiveness of FWI using seislet regularization.




2017-10-09