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This paper proposes an unmanned aerial vehicle (UAV)-based distributed sensing framework that uses orthogonal frequency-division multiplexing (OFDM) waveforms to detect the position of a ground target, and UAVs operate in half-duplex mode.…

Signal Processing · Electrical Eng. & Systems 2023-09-12 Xavier Alejandro Flores Cabezas , Diana Pamela Moya Osorio , Markku Juntti

Aerial Remote Sensing (ARS) vision tasks present significant challenges due to the unique viewing angle characteristics. Existing research has primarily focused on algorithms for specific tasks, which have limited applicability in a broad…

Computer Vision and Pattern Recognition · Computer Science 2025-09-17 Wenhui Diao , Haichen Yu , Kaiyue Kang , Tong Ling , Di Liu , Yingchao Feng , Hanbo Bi , Libo Ren , Xuexue Li , Yongqiang Mao , Xian Sun

Object detection in unmanned aerial vehicle (UAV) images remains a highly challenging task, primarily caused by the complexity of background noise and the imbalance of target scales. Traditional methods easily struggle to effectively…

Computer Vision and Pattern Recognition · Computer Science 2026-04-06 Wenfeng Zhang , Jun Ni , Yue Meng , Xiaodong Pei , Wei Hu , Qibing Qin , Lei Huang

Automatic multi-class object detection in remote sensing images in unconstrained scenarios is of high interest for several applications including traffic monitoring and disaster management. The huge variation in object scale, orientation,…

Computer Vision and Pattern Recognition · Computer Science 2018-11-02 Seyed Majid Azimi , Eleonora Vig , Reza Bahmanyar , Marco Körner , Peter Reinartz

We present DAFNe, a Dense one-stage Anchor-Free deep Network for oriented object detection. As a one-stage model, it performs bounding box predictions on a dense grid over the input image, being architecturally simpler in design, as well as…

Computer Vision and Pattern Recognition · Computer Science 2022-05-31 Steven Lang , Fabrizio Ventola , Kristian Kersting

Small oriented objects that represent tiny pixel-area in large-scale aerial images are difficult to detect due to their size and orientation. Existing oriented aerial detectors have shown promising results but are mainly focused on…

Computer Vision and Pattern Recognition · Computer Science 2024-01-15 Chandler Timm C. Doloriel , Rhandley D. Cajote

In the field of remote sensing, we often utilize oriented bounding boxes (OBB) to bound the objects. This approach significantly reduces the overlap among dense detection boxes and minimizes the inclusion of background content within the…

Computer Vision and Pattern Recognition · Computer Science 2023-09-18 Jianghu Shen , Xiaojun Wu

Unmanned aerial vehicle (UAV) object detection plays a vital role in applications such as environmental monitoring and urban security. To improve robustness, recent studies have explored multimodal detection by fusing visible (RGB) and…

Computer Vision and Pattern Recognition · Computer Science 2025-06-23 Liu Zongzhen , Luo Hui , Wang Zhixing , Wei Yuxing , Zuo Haorui , Zhang Jianlin

Photons that are entangled or correlated in orbital angular momentum have been extensively used for remote sensing, object identification and imaging. It has recently been demonstrated that intensity fluctuations give rise to the formation…

Ship detection is of great importance and full of challenges in the field of remote sensing. The complexity of application scenarios, the redundancy of detection region, and the difficulty of dense ship detection are all the main obstacles…

Computer Vision and Pattern Recognition · Computer Science 2018-11-20 Xue Yang , Hao Sun , Xian Sun , Menglong Yan , Zhi Guo , Kun Fu

With the rapid advancement of intelligent driving and remote sensing, oriented object detection has gained widespread attention. However, achieving high-precision performance is fundamentally constrained by the Angle Boundary Discontinuity…

Computer Vision and Pattern Recognition · Computer Science 2026-04-24 Minghong Wei , Pu Cao , Zhihao Chen , Zhiyuan Zang , Lu Yang , Qing Song

Existing anchor-base oriented object detection methods have achieved amazing results, but these methods require some manual preset boxes, which introduces additional hyperparameters and calculations. The existing anchor-free methods usually…

Computer Vision and Pattern Recognition · Computer Science 2021-12-02 Zhonghua Li , Biao Hou , Zitong Wu , Licheng Jiao , Bo Ren , Chen Yang

This paper proposes a Rotation-equivariant Attention Feature Fusion Pyramid Networks for Aerial Object Detection named ReAFFPN. ReAFFPN aims at improving the effect of rotation-equivariant features fusion between adjacent layers which…

Computer Vision and Pattern Recognition · Computer Science 2022-10-18 Chongyu Sun , Yang Xu , Zebin Wu , Zhihui Wei

Oriented object detection is a fundamental yet challenging task in remote sensing (RS), aiming to locate and classify objects with arbitrary orientations. Recent advancements in deep learning have significantly enhanced the capabilities of…

Computer Vision and Pattern Recognition · Computer Science 2025-08-25 Kun Wang , Zi Wang , Zhang Li , Ang Su , Xichao Teng , Erting Pan , Minhao Liu , Qifeng Yu

Multimodal object detection has shown promise in remote sensing. However, multimodal data frequently encounter the problem of low-quality, wherein the modalities lack strict cell-to-cell alignment, leading to mismatch between different…

Computer Vision and Pattern Recognition · Computer Science 2024-05-27 Hafsa El Hafyani , Bastien Pasdeloup , Camille Yver , Pierre Romenteau

Machine learning is a promising technique for angle-of-arrival (AOA) estimation of waves impinging a sensor array. However, the majority of the methods proposed so far only consider a known, fixed number of impinging waves, i.e., a fixed…

Signal Processing · Electrical Eng. & Systems 2021-11-19 Noud Kanters , Andrés Alayón Glazunov

3D object detection is essential for autonomous driving. As an emerging sensor, 4D imaging radar offers advantages as low cost, long-range detection, and accurate velocity measurement, making it highly suitable for object detection.…

Computer Vision and Pattern Recognition · Computer Science 2025-10-23 Xiaozhi Li , Huijun Di , Jian Li , Feng Liu , Wei Liang

Object detection is an important and challenging problem in computer vision. Although the past decade has witnessed major advances in object detection in natural scenes, such successes have been slow to aerial imagery, not only because of…

Computer Vision and Pattern Recognition · Computer Science 2019-05-21 Gui-Song Xia , Xiang Bai , Jian Ding , Zhen Zhu , Serge Belongie , Jiebo Luo , Mihai Datcu , Marcello Pelillo , Liangpei Zhang

In the past decade, object detection has achieved significant progress in natural images but not in aerial images, due to the massive variations in the scale and orientation of objects caused by the bird's-eye view of aerial images. More…

Computer Vision and Pattern Recognition · Computer Science 2021-12-07 Jian Ding , Nan Xue , Gui-Song Xia , Xiang Bai , Wen Yang , Micheal Ying Yang , Serge Belongie , Jiebo Luo , Mihai Datcu , Marcello Pelillo , Liangpei Zhang

Object detection has made tremendous strides in computer vision. Small object detection with appearance degradation is a prominent challenge, especially for aerial observations. To collect sufficient positive/negative samples for heuristic…

Computer Vision and Pattern Recognition · Computer Science 2022-05-04 Dong Liang , Qixiang Geng , Zongqi Wei , Dmitry A. Vorontsov , Ekaterina L. Kim , Mingqiang Wei , Huiyu Zhou