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Object detection in optical remote sensing images is an important and challenging task. In recent years, the methods based on convolutional neural networks have made good progress. However, due to the large variation in object scale, aspect…

Computer Vision and Pattern Recognition · Computer Science 2021-08-17 Qi Ming , Lingjuan Miao , Zhiqiang Zhou , Yunpeng Dong

Despite recent advances, object detection in aerial images is still a challenging task. Specific problems in aerial images makes the detection problem harder, such as small objects, densely packed objects, objects in different sizes and…

Computer Vision and Pattern Recognition · Computer Science 2022-03-31 Onur Can Koyun , Reyhan Kevser Keser , İbrahim Batuhan Akkaya , Behçet Uğur Töreyin

Objects in aerial images usually have arbitrary orientations and are densely located over the ground, making them extremely challenge to be detected. Many recently developed methods attempt to solve these issues by estimating an extra…

Computer Vision and Pattern Recognition · Computer Science 2021-09-21 Ran Qin , Qingjie Liu , Guangshuai Gao , Di Huang , Yunhong Wang

Object detection on drone-captured scenarios is a recent popular task. As drones always navigate in different altitudes, the object scale varies violently, which burdens the optimization of networks. Moreover, high-speed and low-altitude…

Computer Vision and Pattern Recognition · Computer Science 2021-08-31 Xingkui Zhu , Shuchang Lyu , Xu Wang , Qi Zhao

Object detection has recently seen an interesting trend in terms of the most innovative research work, this task being of particular importance in the field of remote sensing, given the consistency of these images in terms of geographical…

Computer Vision and Pattern Recognition · Computer Science 2025-06-02 Anasse Boutayeb , Iyad Lahsen-cherif , Ahmed El Khadimi

Object detection in Unmanned Aerial Vehicle (UAV) images poses significant challenges due to complex scale variations and class imbalance among objects. Existing methods often address these challenges separately, overlooking the intricate…

Computer Vision and Pattern Recognition · Computer Science 2025-04-29 Zhenteng Li , Sheng Lian , Dengfeng Pan , Youlin Wang , Wei Liu

The past decade has witnessed significant progress on detecting objects in aerial images that are often distributed with large scale variations and arbitrary orientations. However most of existing methods rely on heuristically defined…

Computer Vision and Pattern Recognition · Computer Science 2021-07-13 Jiaming Han , Jian Ding , Jie Li , Gui-Song Xia

Autonomous radar has been an integral part of advanced driver assistance systems due to its robustness to adverse weather and various lighting conditions. Conventional automotive radars use digital signal processing (DSP) algorithms to…

Computer Vision and Pattern Recognition · Computer Science 2020-04-21 Xu Dong , Pengluo Wang , Pengyue Zhang , Langechuan Liu

Object detection has been a building block in computer vision. Though considerable progress has been made, there still exist challenges for objects with small size, arbitrary direction, and dense distribution. Apart from natural images,…

Computer Vision and Pattern Recognition · Computer Science 2019-08-13 Xue Yang , Jirui Yang , Junchi Yan , Yue Zhang , Tengfei Zhang , Zhi Guo , Sun Xian , Kun Fu

Accurate and robust detection of multi-class objects in optical remote sensing images is essential to many real-world applications such as urban planning, traffic control, searching and rescuing, etc. However, state-of-the-art object…

Computer Vision and Pattern Recognition · Computer Science 2020-01-08 Gongjie Zhang , Shijian Lu , Wei Zhang

Text in natural images is of arbitrary orientations, requiring detection in terms of oriented bounding boxes. Normally, a multi-oriented text detector often involves two key tasks: 1) text presence detection, which is a classification…

Computer Vision and Pattern Recognition · Computer Science 2018-03-15 Minghui Liao , Zhen Zhu , Baoguang Shi , Gui-song Xia , Xiang Bai

Existing oriented object detection methods commonly use metric AP$_{50}$ to measure the performance of the model. We argue that AP$_{50}$ is inherently unsuitable for oriented object detection due to its large tolerance in angle deviation.…

Computer Vision and Pattern Recognition · Computer Science 2024-04-09 Ying Zeng , Yushi Chen , Xue Yang , Qingyun Li , Junchi Yan

Objects for detection usually have distinct characteristics in different sub-regions and different aspect ratios. However, in prevalent two-stage object detection methods, Region-of-Interest (RoI) features are extracted by RoI pooling with…

Computer Vision and Pattern Recognition · Computer Science 2017-11-27 Yao Zhai , Jingjing Fu , Yan Lu , Houqiang Li

Challenges in remote sensing object detection(RSOD), such as high interclass similarity, imbalanced foreground-background distribution, and the small size of objects in remote sensing images, significantly hinder detection accuracy.…

Computer Vision and Pattern Recognition · Computer Science 2025-07-04 Yujie Lei , Wenjie Sun , Sen Jia , Qingquan Li , Jie Zhang

Unmanned aerial vehicle object detection (UAV-OD) has been widely used in various scenarios. However, most existing UAV-OD algorithms rely on manually designed components, which require extensive tuning. End-to-end models that do not depend…

Computer Vision and Pattern Recognition · Computer Science 2025-07-02 Huaxiang Zhang , Kai Liu , Zhongxue Gan , Guo-Niu Zhu

Detecting the objects in dense and rotated scenes is a challenging task. Recent works on this topic are mostly based on Faster RCNN or Retinanet. As they are highly dependent on the pre-set dense anchors and the NMS operation, the approach…

Computer Vision and Pattern Recognition · Computer Science 2023-12-06 Zhu Yuke , Ruan Yumeng , Yang Lei , Guo Sheng

The detection of oriented objects is frequently appeared in the field of natural scene text detection as well as object detection in aerial images. Traditional detectors for oriented objects are common to rotate anchors on the basis of the…

Computer Vision and Pattern Recognition · Computer Science 2020-05-11 Haoran Wei , Yue Zhang , Zhonghan Chang , Hao Li , Hongqi Wang , Xian Sun

People detection in top-view, fish-eye images is challenging as people in fish-eye images often appear in arbitrary directions and are distorted differently. Due to this unique radial geometry, axis-aligned people detectors often work…

Computer Vision and Pattern Recognition · Computer Science 2022-01-26 Quan Nguyen Minh , Bang Le Van , Can Nguyen , Anh Le , Viet Dung Nguyen

Detecting objects from UAV-captured images is challenging due to the small object size. In this work, a simple and efficient adaptive zoom-in framework is explored for object detection on UAV images. The main motivation is that the…

Computer Vision and Pattern Recognition · Computer Science 2026-02-13 Tao Wang , Chenyu Lin , Chenwei Tang , Jizhe Zhou , Deng Xiong , Jianan Li , Jian Zhao , Jiancheng Lv

Anomaly detection from a single image is challenging since anomaly data is always rare and can be with highly unpredictable types. With only anomaly-free data available, most existing methods train an AutoEncoder to reconstruct the input…

Computer Vision and Pattern Recognition · Computer Science 2021-03-23 Yunfei Liu , Chaoqun Zhuang , Feng Lu