Jul 9, 2026 · cs.CVJ/K move · Enter open · S save
Wenhao Dong, Xiaoyan Luo, Linlin Yang, Haodong Zhu+3
Beihang University, Beijing, 102206, China · State Key Laboratory of High-Efficiency Reusable Aerospace Transportation Technology, The School of Astronautics, Beihang University, Beijing, 102206, China · The National Key Laboratory of Integrated Air-Ground Navigation Technologies, The School of Astronautics, Beihang University, Beijing, 102206, China · The State Key Laboratory of Media Convergence and Communication, Communication University of China, Beijing, 100024, China · The School of Artificial Intelligence, Beihang University, Beijing, 100191, China
The complementary information between RGB and IR images can significantly enhance object detection performance under extreme conditions. Existing methods prefer dual-stream CNN backbones built upon YOLO for feature extraction and focus on the design of feature fusion. In this paper, we introduce the Laplacian Decoupled Feature Enhancement block (LDFE) to fuse features from different stages of the dual-stream CNN backbone. By design, LDFE simultaneously considers the characteristics of modalities and structures for feature fusion by employing global-local decomposition, denoising, fusion, and reconstruction, sequentially. The LDFE first separates features into global and local components based on Laplacian Pyramid, and then performs denoising and fusion based on Global State Space Enhancement module (GS2E) and Local Convolutional Correlation Enhancement module (LC2E) separately. Specifically, the GS2E conducts a two-branch architecture for the main and auxiliary modalities. It dynamically suppresses noise in the main modality through cross-modal attention derived from the auxiliary modality, while employing a State Space Model to capture long-range dependencies within the global feature representations of the main modality. To obtain bidirectional interaction, the two modalities systematically alternate their main/auxiliary roles. Moreover, the LC2E suppresses noise in local features and leverages spatial and channel dimension along with triple convolution to extract fine-grained details for fusion. These innovative designs achieve a significant performance improvement, with mAP surpassing the SOTA methods 6.2%, 3.7%, 4.7%, 2.3%, 4.1% and 2.0% on M3FD, DroneVehicle, LLVIP, FLIR-Aligned, KAIST and VEDAI datasets,respectively.