DELAN: Dual-Level Alignment for Vision-and-Language Navigation by Cross-Modal Contrastive Learning
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Abstract (arXiv)
Vision-and-Language navigation (VLN) requires an agent to navigate in unseen environment by following natural language instruction. For task completion, the agent needs to align and integrate various navigation modalities, including instruction, observation and navigation history. Existing works primarily concentrate on cross-modal attention at the fusion stage to achieve this objective. Nevertheless, modality features generated by disparate uni-encoders reside in their own spaces, leading to a decline in the quality of cross-modal fusion and decision. To address this problem, we propose a Dual-levEL AligNment (DELAN) framework by cross-modal contrastive learning. This framework is designed to align various navigation-related modalities before fusion, thereby enhancing cross-modal interaction and action decision-making. Specifically, we divide the pre-fusion alignment into dual levels: instruction-history level and landmark-observation level according to their semantic correlations. We also reconstruct a dual-level instruction for adaptation to the dual-level alignment. As the training signals for pre-fusion alignment are extremely limited, self-supervised contrastive learning strategies are employed to enforce the matching between different modalities. Our approach seamlessly integrates with the majority of existing models, resulting in improved navigation performance on various VLN benchmarks, including R2R, R4R, RxR and CVDN.
Key facts. Cited by 7 papers in the map (data through 7 Oct 2026). Builds on 43 of its 47 references that are in the map. First posted on arXiv 2 Apr 2024.
Builds on
43 of 47 references.
References · 43
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31 more
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Built on by
Citing papers per year: 2024: 2; 2025: 1; 2026: 4.
7 papers.
- 2024EmbSpatial-Bench: Benchmarking Spatial Understanding for Embodied Tasks with Large Vision-Language Modelscited by 100
- 2026SpatialNav: Leveraging Spatial Scene Graphs for Zero-Shot Vision-and-Language Navigationcited by 8
- 2024To Ask or Not to Ask? Detecting Absence of Information in Vision and Language Navigationcited by 1
- 2025Multi-Modal Continual Learning via Cross-Modality Adapters and Representation Alignment with Knowledge Preservationcited by 1
- 2026CoME-VL: Scaling Complementary Multi-Encoder Vision-Language Learningcited by 1
- 2026Enhancing Vision-Language Navigation with Multimodal Event Knowledge from Real-World Indoor Tour Videoscited by 0
- 2026Query, Align, and Distill: Navigation-Aware Cross-Modal Interaction for Efficient Vision-and-Language Navigationcited by 0
- 2026Query, Align, and Distill: Navigation-Aware Cross-Modal Interaction for Efficient Vision-and-Language Navigation27 Sep 2026
- 2026CoME-VL: Scaling Complementary Multi-Encoder Vision-Language Learning3 Apr 2026
- 2026Enhancing Vision-Language Navigation with Multimodal Event Knowledge from Real-World Indoor Tour Videos27 Feb 2026
- 2026SpatialNav: Leveraging Spatial Scene Graphs for Zero-Shot Vision-and-Language Navigation11 Jan 2026
- 2025Multi-Modal Continual Learning via Cross-Modality Adapters and Representation Alignment with Knowledge Preservation10 Nov 2025
- 2024To Ask or Not to Ask? Detecting Absence of Information in Vision and Language Navigation6 Nov 2024
- 2024EmbSpatial-Bench: Benchmarking Spatial Understanding for Embodied Tasks with Large Vision-Language Models9 Jun 2024