The development of technological devices, such as satellites and drones, has made it easier to collect images and videos from the air. From these vast data sources, the problem of detecting objects in aerial images is...
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The development of technological devices, such as satellites and drones, has made it easier to collect images and videos from the air. From these vast data sources, the problem of detecting objects in aerial images is formed to serve situations: rescue missions, social scenarios, security needs, and more. This issue attracts a lot of attention from researchers in computer vision because of its high applicability in real life. However, this problem faces many significant challenges due to the complex factors of the environment. To overcome these difficulties, many studies focus on developing effective models for detecting and tracking objects from UAV systems. In this paper, our primary emphasis is a comprehensive survey of methodologies about horizontal and oriented objectdetection. After researching many practical and innovative techniques in different approaches, we have carefully selected 15 methods for horizontal object detection and 18 for oriented objectdetection that were recently researched and developed to conduct classifications, surveys, and assessments. We also provide a taxonomy mind map to assist readers in gaining an overview of the methods we surveyed. Additionally, we examine 17 aerial image datasets collected from platforms and in various locations worldwide. These are typical datasets widely used to serve two primary tasks: horizontal object detection and oriented objectdetection. Then, we compared the experimental results of the previously introduced methods on four typical datasets: VisDrone, UAVDT, DOTAv1.0, and HRSC2016. The above datasets present diversity in the number of classes and the complexity of real-life conditions. Furthermore, they have been tested with various methods and shown remarkable results. For the reasons mentioned, we believe that updating and synthesizing the latest research will provide complete and comprehensive information, helping researchers to have more survey material for the development of the field of object d
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