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- W2889702000 abstract "We develop a 2D travel time tomography method which regularizes the inversion by modeling sparsely patches of slowness pixels from discrete slowness map, and adapts sparse dictionaries to the slowness data. This locally-sparse travel time tomography (LST) approach considers global and local behavior of slowness, whereas conventional regularization methods consider only global covariance of pixels. We develop a maximum a posteriori formulation of LST, and further exploit the sparsity of patches using dictionary learning. We demonstrate the LST method on densely, but irregularly sampled synthetic slowness maps." @default.
- W2889702000 created "2018-09-27" @default.
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- W2889702000 date "2018-04-01" @default.
- W2889702000 modified "2023-09-26" @default.
- W2889702000 title "Adaptive Travel Time Tomography with Local Sparsity" @default.
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- W2889702000 doi "https://doi.org/10.1109/icassp.2018.8461589" @default.
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