The PRIMO Group is proud to announce the first talk of the 2023-2024 season of the “PRIMO Talk” series.
The seminar will be held on Tuesday October 24, 2023 at 5pm (CEST).
Speaker: Andrea Sebastiani (University of Bologna)
Title: Towards fast and explainable architectures for limited angle tomography
Abstract:
In recent years, hybrid reconstruction frameworks have been proposed by unfolding classical iterative methods and learning their inner parameters by using supervised learning techniques. This kind of approaches needs a large number of iterations to reach a good reconstruction, but this requirement leads to some problems such as the gradient vanishing or the huge memory consumption during the training. In order to mitigate these drawbacks, we propose to unfold an inertial scheme, which has a faster convergence rate, which means less iterations required. Moreover, motivated by the new results on Plug-and-Play methods, we replace the proximal operator with a learnable denoiser, which verifies specific conditions by construction leading to the convergence of the resulting scheme. The numerical experiments on limited-angle CT achieve promising results, showing the benefits of our proposal.
The Zoom link to the event will be shared through the PRIMO mailing list and other related mailing lists.
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