基于室内标志的视觉定位方法

黄刚; 蔡浩; 邓超; 何志; 许宁波

doi:10.3963/j.jssn.1674-4861.2021.06.020

基于室内标志的视觉定位方法

doi: 10.3963/j.jssn.1674-4861.2021.06.020

黄刚^1,,
蔡浩^2, ,,
邓超¹,
何志¹,
许宁波¹

1.
武汉科技大学汽车与交通工程学院武汉 430081
2.
武汉纺织大学计算机与人工智能学院武汉 430200

基金项目:

国家自然科学基金青年基金项目 52002298

湖北省自然科学基金青年项目 2020CFB118

湖北省教育厅科学技术研究计划青年人才项目 Q20201107

详细信息

作者简介:
黄刚(1989—), 博士, 讲师. 研究方向: 室内定位、智能汽车感知、场景建模. E-mail: ghuang@wust.edu.cn

通讯作者:
蔡浩(1989—), 博士, 讲师. 研究方向: 智能交通系统、安全辅助驾驶、智能车定位、驾驶行为分析. E-mail: caihao@wtu.edu.cn

中图分类号: U4
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- 被引次数: 0
出版历程
- 收稿日期: 2020-05-23
- 网络出版日期: 2022-01-12

A Visual Localization Method Based on Indoor Signs

HUANG Gang^1
,,
CAI Hao^{2
, ,},
DENG Chao¹,
HE Zhi¹,
XU Ningbo¹

1.
School of Automobile and Traffic Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
2.
School of Computer Science and Artificial Intelligence, Wuhan Textile University, Wuhan 430200, China

摘要

摘要: 为解决室内交通场景中智能汽车和移动机器人进行定位计算的问题, 利用室内场景中已存在的各类标志, 引入BEBLID算法, 提出1种视觉定位方法。对BEBLID算法进行改进, 赋予其对图像整体进行特征表征的能力。将定位过程分解为离线阶段和在线阶段, 离线阶段构建场景标志地图。在线阶段中, 首先通过全局特征匹配, 引入KNN方法确定最近节点和最近图像。通过局部特征匹配获得特征点一一对应关系。利用场景特征地图中存储的标志坐标信息, 进行度量计算, 获取当前位置信息。在教学楼、办公楼和室内停车场场景进行实验, 实验中对场景标志的正确识别率达到90%, 平均定位误差小于1 m, 与传统方法相比, 同一样本下识别精度相对提升约10%, 实验验证了算法的有效性。
- 室内定位 /
- 全局特征 /
- 视觉定位 /
- BEBLID特征
Abstract: A visual localization method is proposed to provide a way of localizing intelligent vehicles and mobile robots in indoor environment. The proposed method exploits various signs within indoor environment and uses the boosted efficient binary local image descriptor(BEBLID)algorithm. The proposed method enforces the ability to characterize the whole image by improving the classic BEBLID. The localization method consists of an offline and online component. For the offline component, a scene sign map is created. For the online component, the localization progress is divided into 3 parts. In the first part, the holistic BEBLID features are matched. The closet sign site and the closet image are located by using the KNN method. In the second part, the correspondences of key points are identified by local BEBLID features matching. In the third part, the current position is localized by metric calculation using coordinate information stored in the scene sign map. The experiment is conducted in three kinds of indoor scenes, including a teaching building, an office building, and an indoor parking lot. The results show that the recognition rate of signs in the scene reaches 90%, and the average localization error is less than 1 m. Compared with the traditional methods, the proposed method improves about 10% of relative recognition rate with the same test set, which verifies the effectiveness of the proposed method.
- indoor localization /
- holistic feature /
- visual localization /
- BEBLID feature

HTML全文

图 1 方法流程图

Figure 1. Flow of the proposed method

下载: 全尺寸图片幻灯片

图 2 BEBLID全局与局部描述符示例

Figure 2. Examples of holistic and local BEBLID features

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图 3 实验场景中部分标志图像

Figure 3. Sign images from experiment scenes

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图 4 第一类场景标志识别结果

Figure 4. Recognition results of the signs in the class-1 scene

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图 5 局部BEBLID特征匹配效果

Figure 5. Matching performance of local BEBLID features

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图 6 第一类场景定位误差

Figure 6. Localization error in the class-1 scene

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图 7 第二类场景标志识别结果

Figure 7. Recognition results of the signs in the class-2 scene

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图 8 第二类场景定位误差

Figure 8. Localization error in the class-2 scene

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表 1 计算效率对比实验结果

Table 1. Comparison experiments of calculation efficacy 单位: ms

方法	场景1	场景2
本文方法	92.0	95.3
ORB^[15]	92.7	96.4

下载: 导出CSV

表 2 第一类场景定位误差

Table 2. Localization error in the class-1 scene

场景	平均误差/m	标准偏差/m	小于1 m的概率/%	耗时/ms
场景1	0.80	1.38	87	152.0
场景2	0.82	1.41	87	152.0

下载: 导出CSV

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