《计算机应用》唯一官方网站 ›› 2024, Vol. 44 ›› Issue (3): 909-915.DOI: 10.11772/j.issn.1001-9081.2023040416
所属专题: 多媒体计算与计算机仿真
收稿日期:
2023-04-13
修回日期:
2023-06-30
接受日期:
2023-07-05
发布日期:
2023-12-04
出版日期:
2024-03-10
通讯作者:
赵春辉
作者简介:
王伟(1984—),男,江苏徐州人,讲师,博士,主要研究方向:计算机视觉、三维重建基金资助:
Wei WANG, Chunhui ZHAO(), Xinyao TANG, Liugang XI
Received:
2023-04-13
Revised:
2023-06-30
Accepted:
2023-07-05
Online:
2023-12-04
Published:
2024-03-10
Contact:
Chunhui ZHAO
About author:
WANG Wei, born in 1984,Ph. D., lecturer. His research interests include computer vision, 3D reconstruction.Supported by:
摘要:
目前较为常用的基于单目视觉的车辆三维检测方法是目标检测结合几何约束的方法,但是几何约束中消失点的位置对结果影响很大。为了获取更加准确的约束条件,提出一种基于地平线检测的车辆三维检测算法。首先,利用车辆图片获取消失点的相对位置,将车辆图片预处理至合适大小;然后,将经过预处理的车辆图片送入消失点检测网络,获得消失点信息热力图组,回归出消失点信息,并计算得出地平线信息;最后,根据地平线信息构建几何约束,在约束空间内对车辆初始尺寸迭代优化计算精确的车辆三维信息。实验结果表明,所述地平线求解算法能够获得更准确的地平线,与随机森林的方法相比,曲线下面积(AUC)提升1.730个百分点;同时,所提地平线约束能够有效地限制车辆三维信息,与使用对角线和消失点约束的算法相比,车辆三维信息的平均精度提升2.201个百分点。可见地平线可以作为几何约束在路侧单目相机的场景下求解车辆三维信息。
中图分类号:
王伟, 赵春辉, 唐心瑶, 席刘钢. 自适应地平线约束下的车辆三维检测[J]. 计算机应用, 2024, 44(3): 909-915.
Wei WANG, Chunhui ZHAO, Xinyao TANG, Liugang XI. 3D vehicle detection with adaptive horizon line constraints[J]. Journal of Computer Applications, 2024, 44(3): 909-915.
实验 | 数据增强 | 尺度变换模块 | Focal Loss | 误差% |
---|---|---|---|---|
基准实验 | × | × | × | 27.102 |
实验1 | √ | × | × | 25.991 |
实验2 | × | √ | × | 22.284 |
实验3 | × | × | √ | 21.505 |
实验4 | √ | √ | √ | 20.770 |
表1 消融实验结果
Tab. 1 Ablation experiments results
实验 | 数据增强 | 尺度变换模块 | Focal Loss | 误差% |
---|---|---|---|---|
基准实验 | × | × | × | 27.102 |
实验1 | √ | × | × | 25.991 |
实验2 | × | √ | × | 22.284 |
实验3 | × | × | √ | 21.505 |
实验4 | √ | √ | √ | 20.770 |
算法 | AUC/% | 算法 | AUC/% |
---|---|---|---|
文献[ | 77.500 | 本文算法 | 79.230 |
文献[ | 74.550 |
表2 不同地平线检测算法性能对比
Tab. 2 Performance comparison of different horizon lines detection algorithms
算法 | AUC/% | 算法 | AUC/% |
---|---|---|---|
文献[ | 77.500 | 本文算法 | 79.230 |
文献[ | 74.550 |
视角 | 长度误差/mm | 宽度误差/mm | 高度误差/mm | 精度/% |
---|---|---|---|---|
平均值 | 204.719 | 131.258 | 169.313 | 92.201 |
左视角 | 162.392 | 125.189 | 158.641 | 94.106 |
中视角 | 260.774 | 118.560 | 149.292 | 90.845 |
右视角 | 190.990 | 149.995 | 200.005 | 91.652 |
表3 多视角车辆三维信息识别误差及精度
Tab. 3 Recognition error and accuracy of multi-view 3D vehicle information
视角 | 长度误差/mm | 宽度误差/mm | 高度误差/mm | 精度/% |
---|---|---|---|---|
平均值 | 204.719 | 131.258 | 169.313 | 92.201 |
左视角 | 162.392 | 125.189 | 158.641 | 94.106 |
中视角 | 260.774 | 118.560 | 149.292 | 90.845 |
右视角 | 190.990 | 149.995 | 200.005 | 91.652 |
算法 | 传感器 | 几何约束 | 精度/% | 帧率/(frame·s-1) |
---|---|---|---|---|
文献[ | 单目相机 | 无 | 89.05 | 33.7 |
文献[ | 单目相机 | 对角线、消失点 | 90.00 | 44.6 |
文献[ | 单目相机 | 俯视2D框 | 92.16 | 36.4 |
文献[ | 单目相机 | 车辆2D、3D框 | 90.72 | 43.0 |
本文算法 | 单目相机 | 对角线、地平线 | 92.20 | 45.7 |
表4 车辆三维检测算法结果对比
Tab. 4 Comparison of 3D vehicle detection algorithms
算法 | 传感器 | 几何约束 | 精度/% | 帧率/(frame·s-1) |
---|---|---|---|---|
文献[ | 单目相机 | 无 | 89.05 | 33.7 |
文献[ | 单目相机 | 对角线、消失点 | 90.00 | 44.6 |
文献[ | 单目相机 | 俯视2D框 | 92.16 | 36.4 |
文献[ | 单目相机 | 车辆2D、3D框 | 90.72 | 43.0 |
本文算法 | 单目相机 | 对角线、地平线 | 92.20 | 45.7 |
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