Efficient labeling of solar flux evolution videos by a deep learning model

Autor:	Chatterjee, Subhamoy, Muñoz-Jaramillo, Andrés, Lamb, Derek A.
Rok vydání:	2023
Předmět:	Astrophysics - Solar and Stellar Astrophysics Astrophysics - Instrumentation and Methods for Astrophysics Computer Science - Artificial Intelligence Computer Science - Machine Learning Electrical Engineering and Systems Science - Image and Video Processing
Zdroj:	Nat.Astron.6(2022)796-803
Druh dokumentu:	Working Paper
DOI:	10.1038/s41550-022-01701-3
Popis:	Machine learning (ML) is becoming a critical tool for interrogation of large complex data. Labeling, defined as the process of adding meaningful annotations, is a crucial step of supervised ML. However, labeling datasets is time consuming. Here we show that convolutional neural networks (CNNs), trained on crudely labeled astronomical videos, can be leveraged to improve the quality of data labeling and reduce the need for human intervention. We use videos of the solar magnetic field, crudely labeled into two classes: emergence or non-emergence of bipolar magnetic regions (BMRs), based on their first detection on the solar disk. We train CNNs using crude labels, manually verify, correct labeling vs. CNN disagreements, and repeat this process until convergence. Traditionally, flux emergence labelling is done manually. We find that a high-quality labeled dataset, derived through this iterative process, reduces the necessary manual verification by 50%. Furthermore, by gradually masking the videos and looking for maximum change in CNN inference, we locate BMR emergence time without retraining the CNN. This demonstrates the versatility of CNNs for simplifying the challenging task of labeling complex dynamic events. Comment: 16 pages, 7 figures, published in Nature Astronomy, June 27, 2022
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2308.14976 Zobrazit plný text záznamu View this record from Arxiv