In the case of a boom in space resource development, space debris will increase dramatically and cause serious problems for the spacecraft in orbit. To address this problem, a novel context sensing-YOLOv5 (CS-YOLOv5) is proposed for small and weak space object detection, which could realize the extraction of local context information and the enhancement and fusion of spatial information. To enhance the expression ability of feature information and the identification ability of the network, we propose the cross-layer context fusion module (CCFM) through multiple branches in parallel to learn the context information of different scales. At the same time, to map the small-scale features sequentially to the features of the previous layer, we design the adaptive weighting module (AWM) to assist the CCFM in further enhancing the expression of features. Additionally, to solve the problem that the spatial information of small objects is easily lost, we designed the spatial information enhancement module (SIEM) to adaptively learn the weak spatial information of small objects that need to be protected. To further enhance the generalization ability of CS-YOLOv5, we propose a contrast mosaic data augmentation to enrich the diversity of the sample. Extensive experiments are conducted on self-built datasets, which strongly prove the effectiveness of our method in space object detection.

The fusion of synthetic aperture radar (SAR) and visible images offers complementary spatial and spectral information, enabling more reliable and comprehensive scene interpretation. However, SAR speckle noise and the intrinsic modality gap pose significant challenges for existing methods in extracting consistent and complementary features. To address these issues, we propose VGSRF-Net, a Retinex-guided SAR reconstruction-driven fusion network that leverages visible-image priors to refine SAR features. This approach effectively reduces modality discrepancies before fusion, enabling improved multi-modal representation. The cross-modality reconstruction module (CMRM) reconstructs SAR features guided by visible priors, effectively reducing modality discrepancies before fusion and enabling improved multi-modal representation. The multi-modal feature joint representation module (MFJRM) enhances cross-modal complementarity by integrating global contextual interactions and local dynamic convolution, thereby achieving further feature alignment. Finally, the feature enhancement module (FEM) refines multi-scale spatial features and selectively enhances high-frequency details in the frequency domain, improving structural clarity and texture fidelity. Extensive experiments on diverse real-world remote sensing datasets demonstrate that VGSRF-Net surpasses state-of-the-art methods in denoising, structural preservation, and generalization under varying noise and illumination conditions.

Lens flare significantly affects the visual quality of images, and it can prevent a computer vision program from performing well in certain tasks, such as optical flow estimation and stereo matching. Removing this issue can help ensure that the program performs optimally in future. Existing deep learning-based methods for lens flare removal suffer from the problem of partial loss of image details and structural information due to the lack of information exchange between channels and weak utilization of local contextual details in the images. To address this issue, we propose a network for nighttime lens flare removal by combining channel attention mechanism and depthwise over-parameterized convolution. Firstly, to enhance the perception and extraction of different types and directions of lens flare, we incorporate the channel attention mechanism into the attention component of the Transformer module, which strengthens the interaction between channels and enhances the feature maps of the input through channel feature enhancement. Secondly, to improve the resolution ability of lens flare details and the effectiveness of lens flare removal, we introduce a depth over-parameterized feedforward network by adding over-parameterized depth convolution blocks in the feedforward network, which enhances the utilization of local contextual information in the images. Experimental results on the Flare7k++ dataset demonstrate that our network achieves a 0.049 dB improvement in PSNR and a slight reduction of 0.0008 in LPIPS compared to the optimal method Uformer, a 0.002 improvement in SSIM compared to the optimal method Restormer.

In smoke interference scenarios, visible image degradation significantly limits the availability of detailed information for fusion. Moreover, a single fusion network often struggles to effectively extract complementary and key information. To overcome these challenges, we propose a infrared and visible image fusion method tailored for smoke interference, termed the Repeated Key Feature Embedding Fusion Network (REFusion). To fully leverage low-frequency and high-frequency information from source images, we design the network with a pre-fusion stage and a fine-fusion stage. To address the heterogeneity between infrared and visible images, we introduce a Cross-Source Context Association Network (CSCAN). By integrating the self-attention mechanism and a cascading pyramid pooling module, we compute attention interaction weights across modes to capture the most relevant context for fusion. To prevent the fusion from favoring one source disproportionately, we enhance the fine-fusion stage with a Differential Information Reinforcement Module (DIRM) and a three-branch network. This structure establishes long-term dependencies between complementary information and excels in capturing high-frequency details. We further design a tailored loss function to enhance the quality of fused images. Extensive experiments demonstrate that REFusion surpasses nine state-of-the-art methods in both visual quality and quantitative metrics, particularly in reproducing scenes obscured by smoke.