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基于旋转中心点估计的遥感目标精确检测算法 被引量:6
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作者 蒋光峰 胡鹏程 +1 位作者 叶桦 仰燕兰 《计算机应用研究》 CSCD 北大核心 2021年第9期2866-2870,共5页
由于遥感图像背景复杂、目标密集分布以及目标尺度、形状差异巨大,给检测带来挑战。当前基于R-CNN的两阶段算法在水平框(HBB)检测上取得了良好效果,然而在定向框(OBB)检测上效果有限。基于点估计的HBB目标检测框架,提出用于定向遥感目... 由于遥感图像背景复杂、目标密集分布以及目标尺度、形状差异巨大,给检测带来挑战。当前基于R-CNN的两阶段算法在水平框(HBB)检测上取得了良好效果,然而在定向框(OBB)检测上效果有限。基于点估计的HBB目标检测框架,提出用于定向遥感目标检测的旋转中心点估计网络(RCNet),大幅提升一阶段anchor-free算法在倾斜目标检测上的性能,同时保持较高的检测速度。RCNet通过添加一个用于方向预测的分支,实现旋转中心点估计。提出新的角度表示方式,解决回归角度参数loss不连续以及宽高交换导致训练过程不稳定的问题。所提方法在DOTA数据集上取得66.68 mAP的检测精度以及29.4 fps的检测速度,实现了最佳的速度和精度平衡。 展开更多
关键词 定向检测 遥感图像 点估计 anchor-free
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一种改进的YOLOv7-OBB舰船识别方法
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作者 孙宏磊 陈雯柏 刘辉翔 《兵器装备工程学报》 CAS 2024年第8期192-198,共7页
为解决高分辨率遥感图像中舰船识别准确率低的问题,提出了一种改进的YOLOv7-OBB舰船识别方法。引入定向检测框OBB(oriented bounding box)和KLD损失,可有效解决舰船密集排列和比例细长且方向任意所产生的漏检问题,在提高定位精度的同时... 为解决高分辨率遥感图像中舰船识别准确率低的问题,提出了一种改进的YOLOv7-OBB舰船识别方法。引入定向检测框OBB(oriented bounding box)和KLD损失,可有效解决舰船密集排列和比例细长且方向任意所产生的漏检问题,在提高定位精度的同时保留了船只的目标方向信息;在YOLOv7基础框架的主干网络加入混合注意力模块ACmix,加强网络对于小目标检测的敏感度,能够提升对小型船只的检测精度;在颈部加入全局注意力机制(NAMAttention)和Partial卷积(PConv),在保证模型轻量化的同时,可提高PAN网络在复杂背景中捕捉关键特征的能力。实验结果表明,与YOLOv7模型相比,该方法在DOTAships数据集上取得了88.5%的平均精度,93.0%的准确率,84.7%的召回率,分别比YOLOv7提高了5%,0.9%和3.9%。与当前主流算法相比,该方法在检测效果上有着明显提升。 展开更多
关键词 YOLOv7-OBB算法 舰船识别 定向检测框 混合注意力模块 全局注意力机制 Partial卷积
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Oriented Bounding Box Object Detection Model Based on Improved YOLOv8
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作者 ZHAO Xin-kang SI Zhan-jun 《印刷与数字媒体技术研究》 CAS 2024年第4期67-75,114,共10页
In the study of oriented bounding boxes(OBB)object detection in high-resolution remote sensing images,the problem of missed and wrong detection of small targets occurs because the targets are too small and have differ... In the study of oriented bounding boxes(OBB)object detection in high-resolution remote sensing images,the problem of missed and wrong detection of small targets occurs because the targets are too small and have different orientations.Existing OBB object detection for remote sensing images,although making good progress,mainly focuses on directional modeling,while less consideration is given to the size of the object as well as the problem of missed detection.In this study,a method based on improved YOLOv8 was proposed for detecting oriented objects in remote sensing images,which can improve the detection precision of oriented objects in remote sensing images.Firstly,the ResCBAMG module was innovatively designed,which could better extract channel and spatial correlation information.Secondly,the innovative top-down feature fusion layer network structure was proposed in conjunction with the Efficient Channel Attention(ECA)attention module,which helped to capture inter-local cross-channel interaction information appropriately.Finally,we introduced an innovative ResCBAMG module between the different C2f modules and detection heads of the bottom-up feature fusion layer.This innovative structure helped the model to better focus on the target area.The precision and robustness of oriented target detection were also improved.Experimental results on the DOTA-v1.5 dataset showed that the detection Precision,mAP@0.5,and mAP@0.5:0.95 metrics of the improved model are better compared to the original model.This improvement is effective in detecting small targets and complex scenes. 展开更多
关键词 Remote sensing image Oriented bounding boxes object detection Small target detection YOLOv8
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