SAR-FAH is a Frequency‑Adaptive Hybrid network that uses Neural Ordinary Differential Equations (NODEs) to despeckle Synthetic Aperture Radar (SAR) images. It separates homogeneous and heterogeneous regions in the frequency domain via wavelet transform, then applies a NODE‑based module to low‑frequency sub‑bands for smooth denoising and an enhanced U‑Net with deformable convolutions to high‑frequency sub‑bands for edge and texture preservation. Experiments on synthetic and real SAR data show that SAR‑FAH outperforms current state‑of‑the‑art despeckling methods both quantitatively and qualitatively.
By Ziqing Ma, Chang Yang, Zhichang Guo, Yao Li
The paper introduces a JiT-based denoising defense for radio signal automatic modulation classification, employing a 1D Transformer trained via flow matching to map adversarial examples onto a clean signal manifold. Experiments on the RML2018.01A dataset show the method outperforms PGD-based adversarial training, improving robust accuracy by at least 20.58% under PGD attacks and clean accuracy by 10.20%. It also demonstrates stronger defense against unseen attack types, achieving up to a 39.72% improvement in robust accuracy at higher attack strengths.
By Shiwei Liu, Linyuan Wang, Nuolin Sun, Libin Hou, Bin Yan
arXiv:2501. 01908v4 Announce Type: replace-cross Abstract: Deep learning (DL) methods have become the state-of-the-art for reconstructing sub-sampled magnetic resonance imaging (MRI) data.
By Mahdi Saberi, Chi Zhang, Mehmet Ak\c{c}akaya
C‑DiffSET is a SAR‑to‑EO image translation framework that uses a pretrained Latent Diffusion Model to adapt SAR imagery to the EO domain. The method exploits the pretrained VAE encoder’s ability to map SAR and EO images into a shared latent space, even when SAR inputs contain varying noise levels. A confidence‑guided diffusion loss further improves pixel‑wise fidelity by reducing artifacts such as appearing or disappearing objects, leading to state‑of‑the‑art results across multiple datasets.
By Jeonghyeok Do, Jaehyup Lee, Munchurl Kim
arXiv:2601.00900v2 Announce Type: replace-cross
Abstract: As a critical application of computational intelligence in remote sensing, deep learning-based synthetic aperture radar (SAR) image target re...
By Yuchao Hou (Shanxi Normal University, Taiyuan, China), Zixuan Zhang (Shanxi Normal University, Taiyuan, China), Jie Wang (Shanxi Normal University, Taiyuan, China), Wenke Huang (Nanyang Technological University, Singapore, Singapore), Lianhui Liang (Guangxi University, Nanning, China), Di Wu (La Trobe University, Melbourne, Australia), Zhiquan Liu (Jinan University, Guangzhou, China), Youliang Tian (Guizhou University, Guiyang, China), Jianming Zhu (Central University of Finance and Economics, Beijing, China), Jisheng Dang (Lanzhou University, Lanzhou, China), Junhao Dong (Nanyang Technological University, Singapore, Singapore), Zhongliang Guo (University of St Andrews, St Andrews, United Kingdom)
arXiv:2602. 21987v3 Announce Type: replace-cross Abstract: Low-dose CT images are essential for reducing radiation exposure in cancer screening, pediatric imaging, and longitudinal monitoring protocols, but their quality is often degraded by noise from low-dose acquisition, patient motion, or scanner limitations, affecting both clinical interpretation and downstream analysis.
By Jitindra Fartiyal, Pedro Freire, Sergei K. Turitsyn, Sergei G. Solovski
arXiv:2505. 22839v2 Announce Type: replace-cross Abstract: Recent studies suggest that diffusion models significantly improve the empirical adversarial robustness of deep neural network models.
By Liu Yuezhang, Xue-Xin Wei
arXiv:2608. 04864v1 Announce Type: cross Abstract: We introduce the neural echo as a tool for understanding the behavior of neural networks.
By Chongbiao Wang, Daniel Gaa, Joachim Weickert, Karl Schrader
arXiv:2609.36210v1 Announce Type: new
Abstract: Generative denoising models, such as diffusion and flow-matching, learn to sample from complex distributions by training a deep neural network denoiser...
By Alexandros Graikos, Nebojsa Jojic, Dimitris Samaras
We introduce the neural echo as a tool for understanding the behavior of neural networks. It generalizes the model-based concepts of impulse responses, diffusion echoes, and filter echoes to learning-based methods.
arXiv:2606. 19652v1 Announce Type: new Abstract: In this work, we introduce a training procedure for shallow neural networks that promotes robustness against adversarial attacks.
By Chao Yin, Antoine Lesage-Landry
The article reviews how spatially adaptive regularisation weight functions can be incorporated into variational image reconstruction models like Total Variation and Total Generalised Variation. It discusses the regularity properties of these weights—constant, continuous, or piecewise constant—and how they influence edge and detail preservation. The authors highlight recent hybrid methods that learn low‑regularity weights via deep neural networks, demonstrating their effectiveness in image denoising and MRI reconstruction.
By Kostas Papafitsoros, Luca Calatroni, Andreas Kofler