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5 papers · 2 filters
Attenuation imaging by wavefield reconstruction inversion with bound constraints and total variation regularization
Hossein S. Aghamiry, Ali Gholami, Stéphane Operto
Wavefield reconstruction inversion (WRI) extends the search space of Full Waveform Inversion (FWI) by allowing for wave equation errors during wavefield reconstruction to match the…
ADMM-based multi-parameter wavefield reconstruction inversion in VTI acoustic media with TV regularization
Hossein S. Aghamiry, Ali Gholami, Stéphane Operto
Full waveform inversion (FWI) is a nonlinear waveform matching procedure, which suffers from cycle skipping when the initial model is not kinematically-accurate enough. To mitigate…
Robust Wavefield Inversion via Phase Retrieval
Hossein S. Aghamiry, Ali Gholami, Stéphane Operto
Extended formulation of Full Waveform Inversion (FWI), called Wavefield Reconstruction Inversion (WRI), offers potential benefits of decreasing the nonlinearity of the inverse prob…
Compound Regularization of Full-waveform Inversion for Imaging Piecewise Media
Hossein S. Aghamiry, Ali Gholami, Stéphane Operto
The nonlinear and ill-posed nature of full waveform inversion (FWI) requires us to use sophisticated regularization techniques to solve it. In most applications, the model paramete…
Implementing bound constraints and total-variation regularization in extended full waveform inversion with the alternating direction method of multiplier: application to large contrast media
Hossein S. Aghamiry, Ali Gholami, Stéphane Operto
Full waveform inversion (FWI) is a waveform matching procedure, which can provide a subsurface model with a wavelength-scale resolution. However, this high resolution makes FWI pro…