105 citations · 761 across the 48 of their papers we have counts for
4 papers · 2 filters
Online optimisation for dynamic electrical impedance tomography
Neil Dizon, Jyrki Jauhiainen, Tuomo Valkonen
Online optimisation studies the convergence of optimisation methods as the data embedded in the problem changes. Based on this idea, we propose a primal dual online method for nonl…
Differential estimates for fast first-order multilevel nonconvex optimisation
Neil Dizon, Tuomo Valkonen
With a view on bilevel and PDE-constrained optimisation, we develop iterative estimates of for composite functions , where is the…
Single-loop methods for bilevel parameter learning in inverse imaging
Ensio Suonperä, Tuomo Valkonen
Bilevel optimisation is used in inverse imaging problems for hyperparameter learning/identification and experimental design, for instance, to find optimal regularisation parameters…
Prediction techniques for dynamic imaging with online primal-dual methods
Neil Dizon, Jyrki Jauhiainen, Tuomo Valkonen
Online optimisation facilitates the solution of dynamic inverse problems, such as image stabilisation, fluid flow monitoring, and dynamic medical imaging. In this paper, we improve…