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Traditional change detection methods based on convolutional neural networks (CNNs) face the challenges of speckle noise and deformation sensitivity for synthetic aperture radar images. To mitigate these issues, we proposed a Multiscale…

Computer Vision and Pattern Recognition · Computer Science 2021-09-28 Yunhao Gao , Feng Gao , Junyu Dong , Heng-Chao Li

It is a challenging problem to detect and recognize targets on complex large-scene Synthetic Aperture Radar (SAR) images. Recently developed deep learning algorithms can automatically learn the intrinsic features of SAR images, but still…

Computer Vision and Pattern Recognition · Computer Science 2022-01-25 Siyan Li , Yue Xiao , Yuhang Zhang , Lei Chu , Robert C. Qiu

Benefiting from a relatively larger aperture's angle, and in combination with a wide transmitting bandwidth, near-field synthetic aperture radar (SAR) provides a high-resolution image of a target's scattering distribution-hot spots.…

Image and Video Processing · Electrical Eng. & Systems 2022-11-29 Xu Zhan , Xiaoling Zhang , Wensi Zhang , Jun Shi , Shunjun Wei , Tianjiao Zeng

Conventional speech enhancement technique such as beamforming has known benefits for far-field speech recognition. Our own work in frequency-domain multi-channel acoustic modeling has shown additional improvements by training a spatial…

Sound · Computer Science 2020-02-10 Taejin Park , Kenichi Kumatani , Minhua Wu , Shiva Sundaram

Deep neural networks (DNNs) are incredibly vulnerable to crafted, imperceptible adversarial perturbations. While adversarial training (AT) has proven to be an effective defense approach, the AT mechanism for robustness improvement is not…

Computer Vision and Pattern Recognition · Computer Science 2023-06-27 Binxiao Huang , Rui Lin , Chaofan Tao , Ngai Wong

Acoustic Scene Classification (ASC) identifies an environment based on an audio signal. This paper explores ASC in low-resource conditions and proposes a novel model, DS-FlexiNet, which combines depthwise separable convolutions from…

Audio and Speech Processing · Electrical Eng. & Systems 2025-04-29 Zhi Chen , Yun-Fei Shao , Yong Ma , Mingsheng Wei , Le Zhang , Wei-Qiang Zhang

Compensation for channel mismatch and noise interference is essential for robust automatic speech recognition. Enhanced speech has been introduced into the multi-condition training of acoustic models to improve their generalization ability.…

Sound · Computer Science 2022-11-24 Hung-Shin Lee , Pin-Yuan Chen , Yao-Fei Cheng , Yu Tsao , Hsin-Min Wang

Deep unfolding networks have recently emerged as a promising approach for synthetic aperture radar (SAR) imaging. However, baseline unfolding networks, typically derived from iterative reconstruction algorithms such as the alternating…

Signal Processing · Electrical Eng. & Systems 2025-06-27 Shiping Fu , Yufan Chen , Zhe Zhang , Xiaolan Qiu , Qixiang Ye

The promising potential of Deep Learning for Automatic Target Recognition (ATR) on Synthetic Aperture Radar (SAR) images vanishes when considering the complexity of collecting training datasets measurements. Simulation can overcome this…

Computer Vision and Pattern Recognition · Computer Science 2022-06-16 Benjamin Camus , Corentin Le Barbu , Eric Monteux

Cross-modal ship re-identification (ReID) between optical and synthetic aperture radar (SAR) imagery is fundamentally challenged by the severe radiometric discrepancy between passive optical imaging and coherent active radar sensing. While…

Computer Vision and Pattern Recognition · Computer Science 2026-05-29 Furui Chen , Han Wang , Yuhan Sun , Jianing You , Yixuan Lv , Zhuang Zhou , Hong Tan , Shengyang Li

Deep neural networks are vulnerable to adversarial perturbations, limiting deployment in safety-critical applications such as synthetic aperture radar (SAR) automatic target recognition (ATR). Randomized smoothing improves robustness by…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Daniel Brignac , Fengwei Tian , Banafsheh Latibari , Abhijit Mahalanobis , Ravi Tandon

Synthetic Aperture Radar (SAR) imagery plays a critical role in all-weather, day-and-night remote sensing applications. However, existing SAR-oriented deep learning is constrained by data scarcity, while the physically grounded speckle…

Computer Vision and Pattern Recognition · Computer Science 2026-03-18 Danxu Liu , Di Wang , Hebaixu Wang , Haoyang Chen , Wentao Jiang , Yilin Cheng , Haonan Guo , Wei Cui , Jing Zhang

Automatic speech recognition (ASR) systems degrade significantly under noisy conditions. Recently, speech enhancement (SE) is introduced as front-end to reduce noise for ASR, but it also suppresses some important speech information, i.e.,…

Audio and Speech Processing · Electrical Eng. & Systems 2023-05-30 Yuchen Hu , Nana Hou , Chen Chen , Eng Siong Chng

Recent advances in deep learning have significantly improved multichannel speech enhancement algorithms, yet conventional training loss functions such as the scale-invariant signal-to-distortion ratio (SDR) may fail to preserve fine-grained…

Sound · Computer Science 2025-06-24 Nasser-Eddine Monir , Paul Magron , Romain Serizel

In recent years, continuous improvements in SAR resolution have significantly benefited applications such as urban monitoring and target detection. However, the improvement in resolution leads to increased discrepancies in scattering…

Computer Vision and Pattern Recognition · Computer Science 2025-09-22 Jiang Qin , Bin Zou , Haolin Li , Lamei Zhang

Synthetic aperture radar (SAR) image change detection is a vital yet challenging task in the field of remote sensing image analysis. Most previous works adopt a self-supervised method which uses pseudo-labeled samples to guide subsequent…

Computer Vision and Pattern Recognition · Computer Science 2022-02-10 Junjie Wang , Feng Gao , Junyu Dong , Shan Zhang , Qian Du

Synthetic Aperture Radar has been extensively used in numerous fields and can gather a wealth of information about the area of interest. This large scene data intensive technology puts a high value on automatic target recognition which can…

Computer Vision and Pattern Recognition · Computer Science 2024-07-10 Guibin Zhao , Pengfei Li , Zhibo Zhang , Fusen Guo , Xueting Huang , Wei Xu , Jinyin Wang , Jianlong Chen

Tomographic SAR technique has attracted remarkable interest for its ability of three-dimensional resolving along the elevation direction via a stack of SAR images collected from different cross-track angles. The emerged compressed sensing…

Signal Processing · Electrical Eng. & Systems 2023-07-19 Muhan Wang , Zhe Zhang , Xiaolan Qiu , Silin Gao , Yue Wang

This paper presents SHTNet, a lightweight spherical harmonic transform (SHT) based framework, which is designed to address cross-array generalization challenges in multi-channel automatic speech recognition (ASR) through three key…

Audio and Speech Processing · Electrical Eng. & Systems 2025-10-22 Xiangzhu Kong , Huang Hao , Zhijian Ou

Existing synthetic aperture radar automatic target recognition (SAR ATR) methods have been effective for the classification of seen target classes. However, it is more meaningful and challenging to distinguish the unseen target classes,…

Image and Video Processing · Electrical Eng. & Systems 2023-08-22 Chenwei Wang , Siyi Luo , Jifang Pei , Xiaoyu Liu , Yulin Huang , Yin Zhang , Jianyu Yang