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Research Article | Open Access

SAM-driven MAE pre-training and background-aware meta-learning for unsupervised vehicle re-identification

Dong Wang1, Qi Wang2,3,4, Weidong Min2,3,4( ), Di Gai2,3,4, Qing Han2,3,4, Longfei Li2, Yuhan Geng5
School of Software, Nanchang University, Nanchang 330047, China
School of Mathematics and Computer Science, Nanchang University, Nanchang 330031, China
Institute of Metaverse, Nanchang University, Nanchang 330031, China
Jiangxi Key Laboratory of Smart City, Nanchang 330031, China
School of Public Health, University of Michigan, Ann Arbor 48109, USA
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Graphical Abstract

Abstract

Distinguishing identity-unrelated background information from discriminative identity information poses a challenge in unsupervised vehicle re-identification (Re-ID). Re-ID models suffer from varying degrees of background interference caused by continuous scene variations. The recently proposed segment anything model (SAM) has demonstrated exceptional performance in zero-shot segmentation tasks. The combination of SAM and vehicle Re-ID models can achieve efficient separation of vehicle identity and background information. This paper proposes a method that combines SAM-driven mask autoencoder (MAE) pre-training and background-aware meta-learning for unsupervised vehicle Re-ID. The method consists of three sub-modules. First, the segmentation capacity of SAM is utilized to separate the vehicle identity region from the background. SAM cannot be robustly employed in exceptional situations, such as those with ambiguity or occlusion. Thus, in vehicle Re-ID downstream tasks, a spatially-constrained vehicle background segmentation method is presented to obtain accurate background segmentation results. Second, SAM-driven MAE pre-training utilizes the aforementioned segmentation results to select patches belonging to the vehicle and to mask other patches, allowing MAE to learn identity-sensitive features in a self-supervised manner. Finally, we present a background-aware meta-learning method to fit varying degrees of background interference in different scenarios by combining different background region ratios. Our experiments demonstrate that the proposed method has state-of-the-art performance in reducing background interference variations.

Keywords

segmentationautoencodermeta-learningunsupervisedre-identification (Re-ID)vehicles

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Computational Visual Media
Volume 10 Issue 4,
August 2024
Pages 771-789
DOI: 10.1007/s41095-024-0424-2
Cite this article:
Wang D, Wang Q, Min W, et al. SAM-driven MAE pre-training and background-aware meta-learning for unsupervised vehicle re-identification. Computational Visual Media, 2024, 10(4): 771-789. https://doi.org/10.1007/s41095-024-0424-2

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Received: 04 January 2024
Accepted: 03 March 2024
Published: 15 August 2024
© The Author(s) 2024.

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