Interface contrast imaging for omni-directional full wavefield migration
L.A. Hoogerbrugge (TU Delft - ImPhys/Computational Imaging, TU Delft - ImPhys/Medical Imaging)
K. W.A. van Dongen (TU Delft - ImPhys/Computational Imaging, TU Delft - ImPhys/Medical Imaging)
Dirk J. Verschuur (TU Delft - ImPhys/Computational Imaging)
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Abstract
Conventional Full Wavefield Migration (FWM) is a full-wavefield inversion method based on recursively applying one-way convolutional propagation and reflection operators in the space-frequency domain at every depth level. Therefore, it struggles to model diving waves and image steep reflectors accurately. In this paper, the Interface Contrast imaging technique, an imaging technique based on the scattering integral developed in the context of medical ultrasound, is presented and used to provide a natural omni-directional extension to the conventional FWM method. The resulting algorithm is applied to a synthetic 2D model featuring a steep reflector. The results of these simulations are given and show that the technique can successfully image steep reflectors. This result yields a proof-of-concept for further research into this algorithm, where including internal scattering is a top priority.