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The speckle noise inherent in Synthetic Aperture Radar (SAR) imagery significantly degrades image quality and complicates subsequent analysis. Given that SAR speckle is multiplicative and Gamma-distributed, effectively despeckling SAR…

Image and Video Processing · Electrical Eng. & Systems 2026-01-22 Junhyuk Heo

Speckle fluctuations seriously limit the interpretability of synthetic aperture radar (SAR) images. Speckle reduction has thus been the subject of numerous works spanning at least four decades. Techniques based on deep neural networks have…

Computer Vision and Pattern Recognition · Computer Science 2021-11-16 Emanuele Dalsasso , Loïc Denis , Florence Tupin

In this letter, we aim to address a synthetic aperture radar (SAR) despeckling problem with the necessity of neither clean (speckle-free) SAR images nor independent speckled image pairs from the same scene, and a practical solution for SAR…

Image and Video Processing · Electrical Eng. & Systems 2021-01-19 Ye Yuan , Jian Guan , Pengming Feng , Yanxia Wu

Synthetic Aperture Radar (SAR) images are widely used in remote sensing due to their all-weather, all-day imaging capabilities. However, SAR images are highly susceptible to noise, particularly speckle noise, caused by the coherent imaging…

Information Theory · Computer Science 2024-12-25 Xuran Hu , Mingzhe Zhu , Djordje Stanković , Zhenpeng Feng , Shouhan Mao , Ljubiša Stanković

We propose a novel approach for generating high quality visible-like images from Synthetic Aperture Radar (SAR) images using Deep Convolutional Generative Adversarial Network (GAN) architectures. The proposed approach is based on a cascaded…

Computer Vision and Pattern Recognition · Computer Science 2018-02-28 Puyang Wang , Vishal M. Patel

Speckle reduction is a prerequisite for many image processing tasks in synthetic aperture radar (SAR) images, as well as all coherent images. In recent years, predominant state-of-the-art approaches for despeckling are usually based on…

Computer Vision and Pattern Recognition · Computer Science 2017-02-27 Wensen Feng , Yunjin Chen

Deep learning methods based synthetic aperture radar (SAR) image target recognition tasks have been widely studied currently. The existing deep methods are insufficient to perceive and mine the scattering information of SAR images,…

Computer Vision and Pattern Recognition · Computer Science 2025-04-08 Chenxi Zhao , Daochang Wang , Siqian Zhang , Gangyao Kuang

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

Image and Video Processing · Electrical Eng. & Systems 2022-01-25 Yunhao Gao , Feng Gao , Junyu Dong , Heng-Chao Li

Convolutional neural networks (CNN) have made great progress for synthetic aperture radar (SAR) images change detection. However, sampling locations of traditional convolutional kernels are fixed and cannot be changed according to the…

Computer Vision and Pattern Recognition · Computer Science 2021-04-07 Junjie Wang , Feng Gao , Junyu Dong

In this letter, we propose a pseudo-siamese convolutional neural network (CNN) architecture that enables to solve the task of identifying corresponding patches in very-high-resolution (VHR) optical and synthetic aperture radar (SAR) remote…

Image and Video Processing · Electrical Eng. & Systems 2018-05-23 Lloyd H. Hughes , Michael Schmitt , Lichao Mou , Yuanyuan Wang , Xiao Xiang Zhu

In this paper, the advancements in structured light beams recognition using speckle-based convolutional neural networks (CNNs) have been presented. Speckle fields, generated by the interference of multiple wavefronts diffracted and…

Optics · Physics 2023-11-02 Venugopal Raskatla , Purnesh Singh Badavath , Vijay Kumar

Convolutional neural networks (CNNs) are the cutting edge model for supervised machine learning in computer vision. In recent years CNNs have outperformed traditional approaches in many computer vision tasks such as object detection, image…

Neural and Evolutionary Computing · Computer Science 2016-03-01 Nitzan Guberman

We propose a generalized convolutional neural network (CNN) architecture that first decomposes the input signal into subbands by an adaptive filter bank structure, and then uses convolutional layers to extract features from each subband…

Image and Video Processing · Electrical Eng. & Systems 2023-06-30 Pavel Sinha , Ioannis Psaromiligkos , Zeljko Zilic

Convolutional neural networks (CNNs) have been extensively and successfully applied to the task of synthetic aperture radar (SAR) image change detection. However, conventional convolutional layers are inherently limited by their local…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Baogui Huan , Chuanzheng Gong , Dezhong Chen , Feng Gao , Junyu Dong , Qian Du

Reliable automatic target segmentation in Synthetic Aperture Radar (SAR) imagery has played an important role in the SAR fields. Different from the traditional methods, Spectral Residual (SR) and CFAR detector, with the recent adavance in…

Image and Video Processing · Electrical Eng. & Systems 2023-08-16 Chenwei Wang , Jifang Pei , Yulin Huang , Jianyu Yang

Image segmentation is considered to be one of the critical tasks in hyperspectral remote sensing image processing. Recently, convolutional neural network (CNN) has established itself as a powerful model in segmentation and classification by…

Computer Vision and Pattern Recognition · Computer Science 2017-12-29 Fahim Irfan Alam , Jun Zhou , Alan Wee-Chung Liew , Xiuping Jia , Jocelyn Chanussot , Yongsheng Gao

Change detection from synthetic aperture radar (SAR) imagery is a critical yet challenging task. Existing methods mainly focus on feature extraction in spatial domain, and little attention has been paid to frequency domain. Furthermore, in…

Computer Vision and Pattern Recognition · Computer Science 2022-02-16 Xiaofan Qu , Feng Gao , Junyu Dong , Qian Du , Heng-Chao Li

Recent advancements in convolutional neural network (CNN)-based techniques for remote sensing pansharpening have markedly enhanced image quality. However, conventional convolutional modules in these methods have two critical drawbacks.…

Computer Vision and Pattern Recognition · Computer Science 2025-03-04 Xueyang Wang , Zhixin Zheng , Jiandong Shao , Yule Duan , Liang-Jian Deng

Contrast and quality of ultrasound images are adversely affected by the excessive presence of speckle. However, being an inherent imaging property, speckle helps in tissue characterization and tracking. Thus, despeckling of the ultrasound…

Computer Vision and Pattern Recognition · Computer Science 2018-01-11 Deepak Mishra , Santanu Chaudhury , Mukul Sarkar , Arvinder Singh Soin

Speckle noise poses a significant challenge in maintaining the quality of synthetic aperture radar (SAR) images, so SAR despeckling techniques have drawn increasing attention. Despite the tremendous advancements of deep learning in…

Computer Vision and Pattern Recognition · Computer Science 2024-01-09 Xuran Hu , Ziqiang Xu , Zhihan Chen , Zhengpeng Feng , Mingzhe Zhu , LJubisa Stankovic