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Unsupervised domain adaptation for object detection addresses the adaption of detectors trained in a source domain to work accurately in an unseen target domain. Recently, methods approaching the alignment of the intermediate features…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 Vinicius F. Arruda , Rodrigo F. Berriel , Thiago M. Paixão , Claudine Badue , Alberto F. De Souza , Nicu Sebe , Thiago Oliveira-Santos

We present a framework for adapting a large pretrained latent diffusion model to high-resolution Synthetic Aperture Radar (SAR) image generation. The approach enables controllable synthesis and the creation of rare or out-of-distribution…

Computer Vision and Pattern Recognition · Computer Science 2025-08-15 Solène Debuysère , Nicolas Trouvé , Nathan Letheule , Olivier Lévêque , Elise Colin

Semi-supervised object detection (SSOD), leveraging unlabeled data to boost object detectors, has become a hot topic recently. However, existing SSOD approaches mainly focus on horizontal objects, leaving oriented objects common in aerial…

Computer Vision and Pattern Recognition · Computer Science 2025-09-26 Dingkang Liang , Wei Hua , Chunsheng Shi , Zhikang Zou , Xiaoqing Ye , Xiang Bai

Synthetic Aperture Radar (SAR) imagery provides all-weather, all-day, and high-resolution imaging capabilities but its unique imaging mechanism makes interpretation heavily reliant on expert knowledge, limiting interpretability, especially…

Computer Vision and Pattern Recognition · Computer Science 2025-03-26 Ruixi You , Hecheng Jia , Feng Xu

The segmentation of synthetic aperture radar (SAR) images is a longstanding yet challenging task, not only because of the presence of speckle, but also due to the variations of surface backscattering properties in the images. Tremendous…

Computer Vision and Pattern Recognition · Computer Science 2017-07-25 Gui-Song Xia , Gang Liu , Wen Yang

The absence of publicly available, large-scale, high-quality datasets for Synthetic Aperture Radar Automatic Target Recognition (SAR ATR) has significantly hindered the application of rapidly advancing deep learning techniques, which hold…

Computer Vision and Pattern Recognition · Computer Science 2026-02-17 Yongxiang Liu , Weijie Li , Li Liu , Jie Zhou , Bowen Peng , Yafei Song , Xuying Xiong , Wei Yang , Tianpeng Liu , Zhen Liu , Xiang Li

The impressive advancements in semi-supervised learning have driven researchers to explore its potential in object detection tasks within the field of computer vision. Semi-Supervised Object Detection (SSOD) leverages a combination of a…

Computer Vision and Pattern Recognition · Computer Science 2024-07-17 Tahira Shehzadi , Ifza , Didier Stricker , Muhammad Zeshan Afzal

These days, unsupervised super-resolution (SR) has been soaring due to its practical and promising potential in real scenarios. The philosophy of off-the-shelf approaches lies in the augmentation of unpaired data, i.e. first generating…

Computer Vision and Pattern Recognition · Computer Science 2020-04-03 Yunxuan Wei , Shuhang Gu , Yawei Li , Longcun Jin

Synthetic Aperture Radar (SAR) enables global, all-weather earth observation. However, owing to diverse imaging mechanisms, domain shifts across sensors and regions severely hinder its semantic generalization. To address this, we present…

Computer Vision and Pattern Recognition · Computer Science 2026-03-13 Ziqi Ye , Ziyang Gong , Ning Liao , Xiaoxing Hu , Di Wang , Hongruixuan Chen , Chen Huang , Yiguo He , Yuru Jia , Xiaoxing Wang , Haipeng Wang , Xue Yang , Junchi Yan

This study explores the application of self-supervised learning (SSL) for improved target recognition in synthetic aperture sonar (SAS) imagery. The unique challenges of underwater environments make traditional computer vision techniques,…

Computer Vision and Pattern Recognition · Computer Science 2023-07-31 BW Sheffield

LiDAR 3D object detection models are inevitably biased towards their training dataset. The detector clearly exhibits this bias when employed on a target dataset, particularly towards object sizes. However, object sizes vary heavily between…

Computer Vision and Pattern Recognition · Computer Science 2022-10-18 Dušan Malić , Christian Fruhwirth-Reisinger , Horst Possegger , Horst Bischof

Spaceborne synthetic aperture radar can provide meters scale images of the ocean surface roughness day or night in nearly all weather conditions. This makes it a unique asset for many geophysical applications. Sentinel 1 SAR wave mode…

Computer Vision and Pattern Recognition · Computer Science 2022-04-12 Nicolae-Catalin Ristea , Andrei Anghel , Mihai Datcu , Bertrand Chapron

Deep learning has emerged as an effective solution for solving the task of object detection in images but at the cost of requiring large labeled datasets. To mitigate this cost, semi-supervised object detection methods, which consist in…

Computer Vision and Pattern Recognition · Computer Science 2025-02-18 Renaud Vandeghen , Gilles Louppe , Marc Van Droogenbroeck

Three-dimensional synthetic aperture radar (3D SAR) is an advanced active microwave imaging technology widely utilized in remote sensing area. To achieve high-resolution 3D imaging,3D SAR requires observations from multiple aspects and…

Computer Vision and Pattern Recognition · Computer Science 2025-09-12 Da Li , Guoqiang Zhao , Chen Yao , Kaiqiang Zhu , Houjun Sun , Jiacheng Bao , Maokun Li

In this paper, we address the limitations of the DETR-based semi-supervised object detection (SSOD) framework, particularly focusing on the challenges posed by the quality of object queries. In DETR-based SSOD, the one-to-one assignment…

Computer Vision and Pattern Recognition · Computer Science 2024-04-03 Tahira Shehzadi , Khurram Azeem Hashmi , Didier Stricker , Muhammad Zeshan Afzal

Most change detection methods assume that pre-change and post-change images are acquired by the same sensor. However, in many real-life scenarios, e.g., natural disaster, it is more practical to use the latest available images before and…

Computer Vision and Pattern Recognition · Computer Science 2022-02-16 Sudipan Saha , Patrick Ebel , Xiao Xiang Zhu

Object detection and classification for aircraft are the most important tasks in the satellite image analysis. The success of modern detection and classification methods has been based on machine learning and deep learning. One of the key…

Computer Vision and Pattern Recognition · Computer Science 2018-06-11 Junghoon Seo , Seunghyun Jeon , Taegyun Jeon

Anomaly detection is a key research challenge in computer vision and machine learning with applications in many fields from quality control to radar imaging. In radar imaging, specifically synthetic aperture radar (SAR), anomaly detection…

Computer Vision and Pattern Recognition · Computer Science 2025-04-21 Lucian Chauvin , Somil Gupta , Angelina Ibarra , Joshua Peeples

Rapid assessment after a natural disaster is key for prioritizing emergency resources. In the case of landslides, rapid assessment involves determining the extent of the area affected and measuring the size and location of individual…

Computer Vision and Pattern Recognition · Computer Science 2022-11-21 Vanessa Böhm , Wei Ji Leong , Ragini Bal Mahesh , Ioannis Prapas , Edoardo Nemni , Freddie Kalaitzis , Siddha Ganju , Raul Ramos-Pollan

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