A preconditioning scheme for full waveform inversion

Conclusions

Preconditioning waveform inversion with non-stationary directional Laplacian filters can yield geologically meaningful velocity models. It can help decrease artifacts due to acquisition geometry or inconsistencies in the data (not shown here). We anticipate that preconditioning can play a bigger role with real data where low frequencies are often lacking, where data are noisy and where the acquisition geometry is irregular.