Article(id=1204386109380862623, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1204386108021911888, articleNumber=null, orderNo=null, doi=10.19620/j.cnki.1000-3703.20221071, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=null, receivedDateStr=null, revisedDate=1675008000000, revisedDateStr=2023-01-30, acceptedDate=null, acceptedDateStr=null, onlineDate=1765077624887, onlineDateStr=2025-12-07, pubDate=1695484800000, pubDateStr=2023-09-24, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1765077624887, onlineIssueDateStr=2025-12-07, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1765077624887, creator=13701087609, updateTime=1765077624887, updator=13701087609, issue=Issue{id=1204386108021911888, tenantId=1146029695717560320, journalId=1189621681917173762, year='2023', volume='', issue='9', pageStart='1', pageEnd='62', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1765077624563, creator=13701087609, updateTime=1765079263705, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1204392983144673781, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1204386108021911888, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1204392983144673782, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1204386108021911888, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=35, endPage=42, ext={EN=ArticleExt(id=1204386109615743651, articleId=1204386109380862623, tenantId=1146029695717560320, journalId=1189621681917173762, language=EN, title=Real-Time Vehicle Target Detection Based on Bird’s-Eye View of Point Cloud, columnId=null, journalTitle=Automobile Technology, columnName=null, runingTitle=null, highlight=null, articleAbstract=
To improve the performance of vehicle detection algorithm based on 3D point clouds, this paper proposed a real-time vehicle target detection algorithm based on the bird’s-eye view of point cloud. First, the original 3D vehicle point cloud was converted into the 2D point cloud RGB feature map. Second, the vehicle’s yaw angle prediction branch was added to achieve accurate vehicle localization based on YOLOv4-tiny network, the target localization capability of the network was improved by adding an improved Spatial Pyramid Pooling-Fast (SPPF) module. Finally, the target detection precision was improved by introducing a dual-attention mechanism and optimizing the loss function in the backbone network. The test results show that the average vehicle detection precision of the proposed algorithm reaches 96.92%, which is 2.94 percentage points higher than YOLOv4-tiny, the average detection accuracy of the proposed algorithm reaches 87.73% in the moderate difficulty of KITTI bird’s-eye view validation set, detection rate reaches 100 frames per second, which is able to meet the real-time requirements.
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针对目前基于三维点云的车辆检测算法实时性差的问题,提出了一种基于点云鸟瞰图的实时车辆目标检测算法。首先,将原始车辆三维点云转换成二维点云RGB特征图;其次,基于YOLOv4-tiny网络添加车辆偏航角度预测分支,实现车辆的准确定位,并通过添加改进空间金字塔池化(SPPF)模块提升网络的目标定位能力;最后,通过在主干网络中引入双注意力机制和优化损失函数提高目标检测精度。试验结果表明:所提出算法的车辆检测平均精度达到96.92%,与YOLOv4-tiny相比提升了2.94百分点,同时在KITTI鸟瞰图验证集中等难度条件下的平均检测精度达到87.73%,且整体网络检测速度达到100 帧/s,可满足实时性要求。
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改进YOLOv4-tiny的车辆点云鸟瞰图实时目标检测算法, figureFileSmall=VEHJ+EotuOqfd1LfJIKbXg==, figureFileBig=VZFrYamS5EuUOBxs2ieygw==, tableContent=null), ArticleFig(id=1204452631570784471, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1204386109380862623, language=EN, label=null, caption=null, figureFileSmall=hGi8AgyLbrHb8fI3pLTYJA==, figureFileBig=8W0fP00GF0ckaaumViitsw==, tableContent=null), ArticleFig(id=1204452631692419302, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1204386109380862623, language=CN, label=图3, caption=
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模型改进前、后PR曲线对比, figureFileSmall=JOuVL2by+NtbJfx7MGkwlQ==, figureFileBig=KR+WRPm+xy1e0Wsz8Wpd4g==, tableContent=null), ArticleFig(id=1204452632933933419, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1204386109380862623, language=EN, label=null, caption=null, figureFileSmall=ysFcZMZNTkWMMYeSshsS/A==, figureFileBig=pycrpqUlCfWren+4Ana7fQ==, tableContent=null), ArticleFig(id=1204452633076539769, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1204386109380862623, language=CN, label=图8, caption=
KITTI验证集不同目标难度下的PR曲线, figureFileSmall=ysFcZMZNTkWMMYeSshsS/A==, figureFileBig=pycrpqUlCfWren+4Ana7fQ==, tableContent=null), ArticleFig(id=1204452633198174598, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1204386109380862623, language=EN, label=null, caption=null, figureFileSmall=jORWtckIz6cBpY9pHBTdzg==, figureFileBig=h6ZTQjfwrQFx2oMKjB1rLA==, tableContent=null), ArticleFig(id=1204452633303032210, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1204386109380862623, language=CN, label=图9, caption=
不同网络下的性能比较, figureFileSmall=jORWtckIz6cBpY9pHBTdzg==, figureFileBig=h6ZTQjfwrQFx2oMKjB1rLA==, tableContent=null), ArticleFig(id=1204452633474998688, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1204386109380862623, language=EN, label=null, caption=null, figureFileSmall=HuzH5dfWUi2p56os9T1wOA==, figureFileBig=8om/0CkMpMx1EyXQy8mb8g==, tableContent=null), ArticleFig(id=1204452633588244906, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1204386109380862623, language=CN, label=图10, caption=
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| 参数 | 数值 |
| 最大训练次数/次 | 300 |
| 批量大小 | 4 |
| 初始学习率 | 0.001 |
| 权重衰减系数 | 0.000 5 |
| 动量参数 | 0.949 |
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网络参数
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| 参数 | 数值 |
| 最大训练次数/次 | 300 |
| 批量大小 | 4 |
| 初始学习率 | 0.001 |
| 权重衰减系数 | 0.000 5 |
| 动量参数 | 0.949 |
), ArticleFig(id=1204452633907012040, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1204386109380862623, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型 | SPPF | ECA-SAM | α-IoU | Mosaic | AP@0.5/% | 检测速率/帧·s-1 |
| YOLOv3 | | | | | 96.48 | 40 |
| YOLOv4 | | | | | 97.11 | 30 |
| YOLOv4-tiny | | | | | 93.98 | 110 |
| 改进模型1 | √ | | | | 95.02 | 100 |
| 改进模型2 | | √ | | | 95.31 | 110 |
| 改进模型3 | √ | √ | | | 96.05 | 100 |
| 改进模型4 | √ | √ | √ | | 96.45 | 100 |
| 本文模型 | √ | √ | √ | √ | 96.92 | 100 |
), ArticleFig(id=1204452634037035478, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1204386109380862623, language=CN, label=表2, caption=
消融试验
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| 模型 | SPPF | ECA-SAM | α-IoU | Mosaic | AP@0.5/% | 检测速率/帧·s-1 |
| YOLOv3 | | | | | 96.48 | 40 |
| YOLOv4 | | | | | 97.11 | 30 |
| YOLOv4-tiny | | | | | 93.98 | 110 |
| 改进模型1 | √ | | | | 95.02 | 100 |
| 改进模型2 | | √ | | | 95.31 | 110 |
| 改进模型3 | √ | √ | | | 96.05 | 100 |
| 改进模型4 | √ | √ | √ | | 96.45 | 100 |
| 本文模型 | √ | √ | √ | √ | 96.92 | 100 |
), ArticleFig(id=1204452634162864606, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1204386109380862623, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 方法 | 使用数据 | 算法耗时/s | 不同目标难度下的平均精度/% |
| 简单 | 中等 | 困难 |
| BirdNet[6] | 点云 | 0.110 | 90.43 | 71.45 | 71.34 |
| VoxelNet[18] | 点云 | 0.230 | 89.60 | 84.81 | 78.57 |
| PointPillars[19] | 点云 | 0.016 | 88.35 | 86.10 | 79.83 |
| MODet[9] | 点云 | 0.050 | 89.89 | 88.57 | 82.13 |
| GridNet-3D[10] | 点云 | 0.047 | 90.06 | 85.81 | 80.13 |
| FS23D[12] | 点云 | 0.018 | 90.04 | 87.19 | 85.95 |
| MV3D[4] | 点云+图像 | 0.360 | 86.55 | 78.10 | 76.67 |
| F-PointNet[20] | 点云+图像 | 0.170 | 88.16 | 84.92 | 76.44 |
| ContFusion[5] | 点云+图像 | 0.060 | 95.44 | 87.34 | 82.43 |
| 本文算法 | 点云 | 0.010 | 94.48 | 87.73 | 85.75 |
), ArticleFig(id=1204452634297082346, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1204386109380862623, language=CN, label=表3, caption=
KITTI数据集下不同网络性能比较
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| 方法 | 使用数据 | 算法耗时/s | 不同目标难度下的平均精度/% |
| 简单 | 中等 | 困难 |
| BirdNet[6] | 点云 | 0.110 | 90.43 | 71.45 | 71.34 |
| VoxelNet[18] | 点云 | 0.230 | 89.60 | 84.81 | 78.57 |
| PointPillars[19] | 点云 | 0.016 | 88.35 | 86.10 | 79.83 |
| MODet[9] | 点云 | 0.050 | 89.89 | 88.57 | 82.13 |
| GridNet-3D[10] | 点云 | 0.047 | 90.06 | 85.81 | 80.13 |
| FS23D[12] | 点云 | 0.018 | 90.04 | 87.19 | 85.95 |
| MV3D[4] | 点云+图像 | 0.360 | 86.55 | 78.10 | 76.67 |
| F-PointNet[20] | 点云+图像 | 0.170 | 88.16 | 84.92 | 76.44 |
| ContFusion[5] | 点云+图像 | 0.060 | 95.44 | 87.34 | 82.43 |
| 本文算法 | 点云 | 0.010 | 94.48 | 87.73 | 85.75 |
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