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- W4300609526 abstract "We investigate the inverse scale space flow as a decomposition method for decomposing data into generalised singular vectors. We show that the inverse scale space flow, based on convex and absolutely one-homogeneous regularisation functionals, can decompose data represented by the application of a forward operator to a linear combination of generalised singular vectors into its individual singular vectors. We verify that for this decomposition to hold true, two additional conditions on the singular vectors are sufficient: orthogonality in the data space and inclusion of partial sums of the subgradients of the singular vectors in the subdifferential of the regularisation functional at zero. We also address the converse question of when the inverse scale space flow returns a generalised singular vector given that the initial data is arbitrary (and therefore not necessarily in the range of the forward operator). We prove that the inverse scale space flow is guaranteed to return a singular vector if the data satisfies a novel dual singular vector condition. We conclude the paper with numerical results that validate the theoretical results and that demonstrate the importance of the additional conditions required to guarantee the decomposition result." @default.
- W4300609526 created "2022-10-03" @default.
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- W4300609526 date "2016-12-29" @default.
- W4300609526 modified "2023-09-23" @default.
- W4300609526 title "Inverse Scale Space Decomposition" @default.
- W4300609526 doi "https://doi.org/10.48550/arxiv.1612.09203" @default.
- W4300609526 hasPublicationYear "2016" @default.
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