收稿日期:2022-06-14
修回日期:2022-08-04
接受日期:2022-09-15
出版日期:2023-05-25
发布日期:2022-09-30
通讯作者:
丁艳
E-mail:dingyan@bit.edu.cn
基金资助:
Yutong ZHANG, Jianmei SONG, Yan DING(
), Jinpeng LIU
Received:2022-06-14
Revised:2022-08-04
Accepted:2022-09-15
Online:2023-05-25
Published:2022-09-30
Contact:
Yan DING
E-mail:dingyan@bit.edu.cn
Supported by:摘要:
SLAM技术在卫星导航拒止环境下的自主导航中有着广泛的应用前景。结合单目鱼眼SLAM可获取更多纹理信息的优势和RGBD-SLAM可直接获取尺度信息的优势,设计基于单目鱼眼相机和RGBD相机的异构协同SLAM系统。首先设计特征点对三维灰度质心方向一致性检验方法以筛选异构图像之间的候选匹配点。然后设计异构图像之间的分步式光流-投影匹配方法,以实现鱼眼相机和RGBD相机之间高性能的特征点匹配与相对位姿估计。最后基于ORB-SLAM2框架,提出基于鱼眼相机和RGBD相机的异构协同SLAM系统框架。实验结果表明:相比于传统的特征点匹配方法,设计的特征匹配方法在异构相机的图像特征匹配任务中能够表现出更高的性能。相比于单目鱼眼SLAM系统和RGBD-SLAM系统,提出的异构协同SLAM系统在相机快速移动、相机贴近景物、低帧率、纹理缺失等条件下,以及在相机纯旋转运动、室外大场景等条件下性能更优,其鲁棒性、抗轨迹漂移能力和轨迹精度比单目鱼眼SLAM系统和RGBD-SLAM系统都有较大提升。
中图分类号:
张宇桐, 宋建梅, 丁艳, 刘锦鹏. 基于鱼眼相机和RGBD相机的异构协同SLAM[J]. 航空学报, 2023, 44(10): 327621.
Yutong ZHANG, Jianmei SONG, Yan DING, Jinpeng LIU. Heterogeneous collaborative SLAM based on fisheye and RGBD cameras[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023, 44(10): 327621.
表1
算法在不同数据集中的匹配成功次数和成功率
| 数据集 | 匹配 次数 | 本文算法 | 暴力匹配 | BoW | FLANN | ||||
|---|---|---|---|---|---|---|---|---|---|
匹配 成功次数 | 匹配 成功率/% | 匹配 成功次数 | 匹配 成功率/% | 匹配 成功次数 | 匹配 成功率/% | 匹配 成功次数 | 匹配 成功率/% | ||
| 1-花园 | 1 309 | 1 252 | 95.6 | 590 | 45.1 | 0 | 0 | 147 | 11.2 |
| 2-走廊 | 1 535 | 1 529 | 99.6 | 1 122 | 73.1 | 574 | 37.4 | 401 | 26.1 |
| 3-实验室1 | 1 815 | 1 767 | 97.4 | 1 219 | 67.2 | 75 | 4.1 | 420 | 23.1 |
| 4-办公室1 | 1 609 | 1 483 | 92.2 | 753 | 46.8 | 58 | 3.6 | 352 | 21.9 |
| 5-实验室2 | 6 435 | 6 211 | 96.5 | 3 813 | 59.3 | 146 | 2.3 | 1 200 | 18.6 |
| 6-办公室2 | 1 831 | 1 771 | 96.7 | 1 010 | 55.2 | 184 | 10.0 | 559 | 30.5 |
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