DenseTwins:マルチモーダル自己教師あり学習のための密なモダリティ分離
DenseTwins: Dense Modality Decoupling for Multimodal Self-Supervision
密な特徴空間を共有成分とモダリティ固有成分に明示的に分離し、冗長性削減とクロスモーダル対応を組み合わせてマルチモーダル自己教師あり学習を行うフレームワークを提案した。
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著者: Carlo Sgaravatti, Daniele Kopyshevskiy, Davide Secco, Giacomo Boracchi
分類: cs.CV, cs.AI, cs.LG
原文アブストラクト
Multimodal perception is central to many computer vision applications, including robotics and autonomous driving, where different sensing modalities provide complementary cues. Self-supervised learning offers a scalable solution for exploiting large amounts of unlabeled multimodal data. However, existing methods either neglect modality-specific information by enforcing feature-space alignment between modalities or learn only global representations without preserving spatial structure. We propose DenseTwins, a multimodal self-supervised framework that learns dense representations by explicitly decoupling the dense feature space into shared and modality-specific components. The proposed approach combines dense cross-modal correspondences with redundancy-reduction objectives, enabling the model to capture both shared semantics and modality-specific cues within a structured dense embedding space. DenseTwins jointly optimizes an intra-modal objective across augmented views and a cross-modal objective that aligns shared features while decorrelating modality-specific information. We evaluate DenseTwins across multiple multimodal benchmarks and sensing setups, achieving state-of-the-art or competitive performance across multimodal self-supervised baselines. Code available at: https://github.com/CarloSgaravatti/DenseTwins.