Mentor3AD: Feature Reconstruction-based 3D Anomaly Detection via Multi-modality Mentor Learning

Hanzhe Liang

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arXiv · 2505.21420

Mentor3AD: Feature Reconstruction-based 3D Anomaly Detection via Multi-modality Mentor Learning

Hanzhe Liang

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Abstract

Multimodal feature reconstruction is a promising approach for 3D anomaly detection, leveraging the complementary information from dual modalities. We further advance this paradigm by utilizing multi-modal mentor learning, which fuses intermediate features to further distinguish normal from feature differences. To address these challenges, we propose a novel method called Mentor3AD, which utilizes multi-modal mentor learning. By leveraging the shared features of different modalities, Mentor3AD can extract more effective features and guide feature reconstruction, ultimately improving detection performance. Specifically, Mentor3AD includes a Mentor of Fusion Module (MFM) that merges features extracted from RGB and 3D modalities to create a mentor feature. Additionally, we have designed a Mentor of Guidance Module (MGM) to facilitate cross-modal reconstruction, supported by the mentor feature. Lastly, we introduce a Voting Module (VM) to more accurately generate the final anomaly score. Extensive comparative and ablation studies on MVTec 3D-AD and Eyecandies have verified the effectiveness of the proposed method.

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BibTeX RIS

Hanzhe Liang. 2025-05-27. Mentor3AD: Feature Reconstruction-based 3D Anomaly Detection via Multi-modality Mentor Learning. https://arxiv.org/abs/2505.21420

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