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GCL-YOLO: A GhostConv-Based Lightweight YOLO Network for UAV Small Object Detection
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GCL-YOLO: A GhostConv-Based Lightweight YOLO Network for UAV Small Object Detection
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GCL-YOLO: A GhostConv-Based Lightweight YOLO Network for UAV Small Object Detection
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Journal Article
GCL-YOLO: A GhostConv-Based Lightweight YOLO Network for UAV Small Object Detection
2023
Overview
Precise object detection for unmanned aerial vehicle (UAV) images is a prerequisite for many UAV image applications. Compared with natural scene images, UAV images often have many small objects with few image pixels. These small objects are often obscured, densely distributed, or in complex scenes, which causes great interference to object detection. Aiming to solve this problem, a GhostConv-based lightweight YOLO network (GCL-YOLO) is proposed. In the proposed network, a GhostConv-based backbone network with a few parameters was firstly built. Then, a new prediction head for UAV small objects was designed, and the original prediction head for large natural scene objects was removed. Finally, the focal-efficient intersection over union (Focal-EIOU) loss was used as the localization loss. The experimental results of the VisDrone-DET2021 dataset and the UAVDT dataset showed that, compared with the YOLOv5-S network, the mean average precision at IOU = 0.5 achieved by the proposed GCL-YOLO-S network was improved by 6.9% and 1.8%, respectively, while the parameter amount and the calculation amount were reduced by 76.7% and 32.3%, respectively. Compared with some excellent lightweight networks, the proposed network achieved the highest and second-highest detection accuracy on the two datasets with the smallest parameter amount and a medium calculation amount, respectively.
Publisher
MDPI AG
Subject
