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- W4292332819 abstract "Sparse Bayesian learning (SBL) is a powerful framework for tackling the sparse coding problem. However, the most popular inference algorithms for SBL become too expensive for high-dimensional settings, due to the need to store and compute a large covariance matrix. We introduce a new inference scheme that avoids explicit construction of the covariance matrix by solving multiple linear systems in parallel to obtain the posterior moments for SBL. Our approach couples a little-known diagonal estimation result from numerical linear algebra with the conjugate gradient algorithm. On several simulations, our method scales better than existing approaches in computation time and memory, especially for structured dictionaries capable of fast matrix-vector multiplication." @default.
- W4292332819 created "2022-08-19" @default.
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- W4292332819 date "2022-02-25" @default.
- W4292332819 modified "2023-10-18" @default.
- W4292332819 title "High-Dimensional Sparse Bayesian Learning without Covariance Matrices" @default.
- W4292332819 doi "https://doi.org/10.48550/arxiv.2202.12808" @default.
- W4292332819 hasPublicationYear "2022" @default.
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