  RGB-T semantic segmentation is a key technique for autonomous driving scenes
understanding. For the existing RGB-T semantic segmentation methods, however,
the effective exploration of the complementary relationship between different
modalities is not implemented in the information interaction between multiple
levels. To address such an issue, the Context-Aware Interaction Network
(CAINet) is proposed for RGB-T semantic segmentation, which constructs
interaction space to exploit auxiliary tasks and global context for explicitly
guided learning. Specifically, we propose a Context-Aware Complementary
Reasoning (CACR) module aimed at establishing the complementary relationship
between multimodal features with the long-term context in both spatial and
channel dimensions. Further, considering the importance of global contextual
and detailed information, we propose the Global Context Modeling (GCM) module
and Detail Aggregation (DA) module, and we introduce specific auxiliary
supervision to explicitly guide the context interaction and refine the
segmentation map. Extensive experiments on two benchmark datasets of MFNet and
PST900 demonstrate that the proposed CAINet achieves state-of-the-art
performance. The code is available at https://github.com/YingLv1106/CAINet.
