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• W2753667492 abstract "We show that two problems involving the anisotropic total variation (TV) and interval constraints on the unknown variables admit, under some conditions, a simple sequential solution. Problem 1 is a constrained TV penalized image denoising problem; problem 2 is a constrained fused lasso signal approximator. The sequential solution entails finding first the solution to the unconstrained problem, and then applying a thresholding to satisfy the constraints. If the interval constraints are uniform, this sequential solution solves problem 1. If the interval constraints furthermore contain zero, the sequential solution solves problem 2. Here uniform interval constraints refer to all unknowns being constrained to the same interval. A typical example of application is image denoising in x-ray CT, where the image intensities are non-negative as they physically represent linear attenuation coefficient in the patient body. Our results are simple yet seem unknown; we establish them using the Karush–Kuhn–Tucker conditions for constrained convex optimization." @default.
• W2753667492 created "2017-09-15" @default.
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• W2753667492 date "2017-09-01" @default.
• W2753667492 modified "2023-10-17" @default.
• W2753667492 title "A sequential solution for anisotropic total variation image denoising with interval constraints" @default.
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• W2753667492 doi "https://doi.org/10.1088/1361-6560/aa837d" @default.
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