基于视觉和惯性传感器的大型邮轮室内旅客身份识别方法

冯晓艺; 马玉亭; 陈聪; 王一飞; 刘克中; 陈默子

doi:10.3963/j.jssn.1674-4861.2024.01.008

基于视觉和惯性传感器的大型邮轮室内旅客身份识别方法

doi: 10.3963/j.jssn.1674-4861.2024.01.008

冯晓艺^1,,
马玉亭¹,
陈聪²,
王一飞²,
刘克中^{1, 3, ,},
陈默子^{1, 3, 4}

1.
武汉理工大学航运学院武汉 430063
2.
中船邮轮科技发展有限公司上海 200137
3.
内河航运技术湖北省重点实验室武汉 430063
4.
广东省内河港航产业研究有限公司广东韶关 512100

基金项目:

国家自然科学基金面上项目 51979216

湖北省自然科学基金创新群体项目 2021CFA001

湖北省自然科学基金青年项目 20221J0059

详细信息

作者简介:
冯晓艺（2000—），硕士研究生. 研究方向：室内定位. E-mail: 318403@whut.edu.cn

通讯作者:
刘克中（1976—），博士，教授. 研究方向：水上交通安全. E-mail: kzliu@whut.edu.cn

中图分类号: U675.79;TP212.9
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- 文章访问数: 239
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- 被引次数: 0
出版历程
- 收稿日期: 2023-08-31
- 网络出版日期: 2024-05-31

A Method for Indoor Passenger Identity Recognition on Large Cruise Ships Based on Vision and Inertial Sensors

FENG Xiaoyi^1
,,
MA Yuting¹,
CHEN Cong²,
WANG Yifei²,
LIU Kezhong^{1, 3
, ,},
CHEN Mozi^{1, 3, 4}

1.
School of Navigation, Wuhan University of Technology, Wuhan 430063, China
2.
CSSC Cruise Technology Development Co., Ltd., Shanghai 200137, China
3.
Hubei Provincial Key Laboratory of Inland Navigation Technology, Wuhan 430063, China
4.
Guangdong Inland Port and Shipping Industry Research Co., Ltd., Shaoguan 512000, China

摘要

摘要: 邮轮内部结构及场景复杂，基于监控用单目摄像头的旅客身份识别方法缺乏深度信息，无法准确识别旅客位置、航向及航向变化信息，难以在复杂场景下准确识别旅客身份。针对上述问题，提出了基于监控用单目摄像头与手持惯性传感器的大型邮轮室内旅客身份识别方法。根据YOLOv5视觉目标检测算法，提取监控视频帧中旅客的像素坐标与边界框；利用2D-3D坐标转换公式，将相机图像中旅客的像素坐标转换为物理世界中旅客与相机的相对坐标；再基于改进神经网络模型，估计旅客在相机相对坐标系下的航向角。利用旅客智能手机中惯性传感器，采集旅客运动数据，检测旅客加速度的变化，判别旅客行走状态；融合磁场强度，推算旅客在大地坐标系下的真实航向角；融合提取的视觉和惯性传感器数据，对旅客的有限特征及其关系进行编码，包括瞬时时刻行走状态、步长、相对航向角和相对距离，解决传感器信号的误差累积问题；基于构建的2幅多关联图，提出特征之间的相似度计算公式，再利用视觉与惯性传感器特征图匹配（vision and inertial sensors graph matching，VIGM）算法求解最大相似度矩阵，实现对2幅图中的同一旅客的识别。经长江“黄金3号”邮轮大厅、棋牌室、多功能厅和走廊4个场景实验，可以发现：VIGM算法在1~3 s窗口内平均匹配准确率达83.9%，与使用高成本深度相机的ViTag身份匹配算法相比，平均匹配准确率仅相差4.5%。实验结果表明：所提基于摄像头与惯性传感器的旅客身份识别方法及算法实现成本低，但识别效果与使用高成本深度相机的方法相当。
- 室内定位 /
- 邮轮室内环境 /
- 多身份匹配 /
- 特征图模型 /
- 视觉 /
- 惯性传感器
Abstract: The internal structure and scenes on cruise ships are complex and the surveillance camera offers limited depth information, which makes it difficult to identify the location, heading, changes in heading, and the identity of the passengers by the traditional passenger identity recognition method (PIRM) based on a single surveillance camera. To fill the gap, a novel method for indoor PIRM based on vision and inertial sensors is proposed. The YOLOv5 algorithm is used to extract the bounding box of each passenger and assign the pixel coordinate for each box; the pixel coordinate is further converted into the world coordinate system fixing on the camera according to the 2D-3D coordinate transformation formula; an improved neural network model then is used to estimate the true heading angle of passengers in the camera coordinate system. The inertial sensor data from passengers' smartphones are collected to detect the acceleration of the passengers and their walking states; the true heading angle of passengers in the world geodetic system is calculated by integrating magnetic field intensity; then, the extracted visual and inertial sensor data are fused, and limited features of passengers and their relationships are encoded, including walking state, step length, relative heading angle, relative distance, so as to solve the error accumulation problem of sensor signals. A similarity calculation formula between the features is proposed based on the two multi-correlation graphs, and the Vision and Inertial Sensors Graph Matching (VIGM) algorithm is employed to solve the maximum similarity matrix, which could identify the same passenger in both graphs. Lastly, to validate the proposed method, four scenes on the"Yangtze River Golden 3"cruise ship are employed (including the lobby, chess room, multi-function hall, and corridor), and it is found that: the average matching accuracy (AMA) of the proposed VIGM algorithm reaches 83.9% with the 1—3 s time window; the AMA of the proposed algorithm is only 4.5% lower than the ViTag algorithm using high-cost depth cameras. The results of experiments show that the proposed PIRM and VIGM algorithm have low implementation costs but equivalent performance compared to the method using high-cost depth cameras on large cruise ships.
- indoor positioning /
- indoor environment of cruise ship /
- multi-identity matching /
- feature map model /
- vision /
- inertial sensors

HTML全文

图 1 旅客身份匹配效果示意图

Figure 1. The schematic diagram of the effects of passenger identity matching

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图 2 智能手机局部坐标系

Figure 2. Smartphone local coordinate system

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图 3 系统框架示意图

Figure 3. System framework diagram

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图 4 全局航向角3D图（左）和俯视图（右）

Figure 4. Global heading angle 3D plot (left) and top view (right)

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图 5 神经网络模型

Figure 5. Neural network models

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图 6 特征图匹配法

Figure 6. Feature map matching method

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图 7 典型邮轮室内场景图

Figure 7. Typical ship interior scene

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图 8 设备部署示意图

Figure 8. Device deployment diagram

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图 9 基于YOLO v5算法的行人目标检测结果

Figure 9. Result of Pedestrian Detection Based on YOLO v5

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图 10 视觉航向角误差分析

Figure 10. Visual heading angle error analysis

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图 11 惯性传感器数据差异

Figure 11. Inertial sensor data discrepancies

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图 12 步数检测误差分析

Figure 12. Step detection error analysis

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图 13 传感器航向角误差分析

Figure 13. Sensor heading angle error analysis

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图 14 行人身份匹配精度

Figure 14. Pedestrian identity matching accuracy

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