Hierarchical multi-modal feature fusion for RGBT tracking
摘要
In RGBT tracking, the TIR modality complements the RGB modality by providing robust information in challenging scenarios such as low-light conditions and occlusions, thereby enhancing the robustness and stability of visual tracking. However, existing RGBT tracking methods often extract features separately, and then simply concatenate or fuse them without fully exploring the inherent relationships between the modalities. To address these issues, a novel RGBT object tracking framework is proposed in this paper. It employs a hierarchical multi-modal feature fusion strategy to boost tracking accuracy. Specifically, X-Modal Bridge Attention (XMBA) mechanism is introduced to integrate features of different modalities, realizing coarse-grained and effective interactions. Furthermore, a Multi-modal Deep Interaction Module (MDIM) is designed to perform multi-level feature fusion, dynamically guiding fine-grained interactions via templates. This hierarchical fusion strategy enables the model to gain a comprehensive understanding of target features in complex scenarios, ultimately enhancing its tracking performance. Extensive experimental results on three popular RGBT tracking benchmarks demonstrate the superiority of our proposed tracker. It achieves state-of-the-art performance, exhibiting robust results even under challenging conditions such as fast motion, abrupt illumination variation, motion blur, similar appearance and partial occlusion. The implementation and training information will be released in the future at: https://github.com/TrackingR/HMFF.git.