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  • Sparse_SSNet_Paper_v7

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Semantic Segmentation with a Sparse Convolutional Neural Network for Event Reconstruction in MicroBooNE

Research output: Contribution to journalJournal articlepeer-review

Published
Article number052012
<mark>Journal publication date</mark>26/03/2021
<mark>Journal</mark>Physical Review D
Issue number5
Volume103
Number of pages15
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We present the performance of a semantic segmentation network, SparseSSNet, that provides pixel-level classification of MicroBooNE data. The MicroBooNE experiment employs a liquid argon time projection chamber for the study of neutrino properties and interactions. SparseSSNet is a submanifold sparse convolutional neural network, which provides the initial machine learning based algorithm utilized in one of MicroBooNE's $\nu_e$-appearance oscillation analyses. The network is trained to categorize pixels into five classes, which are re-classified into two classes more relevant to the current analysis. The output of SparseSSNet is a key input in further analysis steps. This technique, used for the first time in liquid argon time projection chambers data and is an improvement compared to a previously used convolutional neural network, both in accuracy and computing resource utilization. The accuracy achieved on the test sample is $\geq 99\%$. For full neutrino interaction simulations, the time for processing one image is $\approx$ 0.5 sec, the memory usage is at 1 GB level, which allows utilization of most typical CPU worker machine.

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© 2021 American Physical Society