Research on Key Technologies of Infrastructure Digitalization based on Multimodal Spatial Data
作者: Zhanyuan Tian, Tianrui Zhu, Zerui Tian, Zhen Dong
分类: cs.CV, cs.MM
发布日期: 2023-10-22
备注: 20 pages, in Chinese language, 12 figures
💡 一句话要点
提出多模态空间数据基础设施数字化关键技术以解决交通网络构建问题
🎯 匹配领域: 支柱六:视频提取与匹配 (Video Extraction) 支柱九:具身大模型 (Embodied Foundation Models)
关键词: 数字双胞胎 点云处理 交通网络 多模态数据 特征提取 智能交通 机器学习
📋 核心要点
- 现有的数字双胞胎交通网络构建方法存在误判特征点和网格空洞等问题,影响了数据的准确性和可靠性。
- 本文提出通过构建点云金字塔和扩展虚拟网格等方法,优化点云数据处理,并利用CSF和PTD算法构建道路网络模型。
- 实验结果显示,优化后的道路文本识别准确率达到90%,并成功实现了道路摄像头位置的高精度计算。
📝 摘要(中文)
自2010年NASA提出数字双胞胎概念以来,许多行业,包括交通行业,开始追求数字化发展。尽管在成熟框架下,仍存在许多问题需要解决。本文总结了激光扫描点云信息在道路网络构建中的主要特征,分析了误判特征点和网格空洞等潜在问题,并提出了针对性的解决方案,如构建点云金字塔、扩展虚拟网格等。通过优化地面点云的遥感数据,本文实现了90%的道路文本识别准确率,并设计了P2PRN网络用于实时数字双胞胎交通的特征生成与匹配,成功计算出道路摄像头位置的精度为10°和15m。
🔬 方法详解
问题定义:本文旨在解决在道路网络构建中,激光扫描点云信息的误判和数据空洞等问题,这些问题会导致交通网络模型的准确性下降。
核心思路:通过构建点云金字塔和扩展虚拟网格来优化点云数据处理,结合CSF算法进行地面点云提取,利用PTD算法构建更为精确的道路网络模型。
技术框架:整体流程包括点云数据的收集、特征提取、网络构建和优化,主要模块包括点云金字塔构建、虚拟网格扩展、地面点云提取和道路网络模型构建。
关键创新:本文的创新点在于提出了点云金字塔的构建方法和虚拟网格扩展策略,这些方法有效解决了现有技术中的数据误判和空洞问题。
关键设计:在点云处理过程中,采用了CSF算法进行地面点云提取,PTD算法用于道路网络构建,同时在文本识别中使用PaddleOCR和Densenet,确保高效的特征提取和匹配。
🖼️ 关键图片
📊 实验亮点
实验结果表明,优化后的道路文本识别准确率达到了90%,相较于传统方法有显著提升。此外,P2PRN网络成功计算出道路摄像头位置的精度为10°和15m,展示了该方法在实时数字双胞胎交通中的有效性。
🎯 应用场景
该研究的潜在应用领域包括智能交通系统、城市规划和基础设施管理等。通过提高交通网络的数字化水平,可以有效提升交通管理效率,减少交通事故,并为未来的智能交通解决方案奠定基础。
📄 摘要(原文)
Since NASA put forward the concept of the digital twin in 2010, many industries have put forward the dynamic goal of digital development, and the transportation industry is also among them. With more and more companies laying out on this virgin land, the digital twin transportation industry has grown rapidly and gradually formed a complete scientific research system. However, under the largely mature framework, there are still many loophole problems that need to be solved. In the process of constructing a road network with point cloud information, we summarize several major features of the point cloud collected by laser scanners and analyze the potential problems of constructing the network, such as misjudging the feature points as ground points and grid voids. On this basis, we reviewed relevant literature and proposed targeted solutions, such as building a point cloud pyramid modeled after the image pyramid, expanding the virtual grid, etc., applying CSF for ground-point cloud extraction, and constructing a road network model using the PTD (progressive density-based filter) algorithm. For the problem of road sign detection, we optimize the remote sensing data in the ground point cloud by enhancing the information density using edge detection, improving the data quality by removing the low intensity points, and achieving 90% accuracy of road text recognition using PaddleOCR and Densenet. As for the real-time digital twin traffic, we design the P2PRN network using the backbone of MPR-GAN for 2D feature generation and SuperGlue for 2D feature matching, rendering the viewpoints according to the matching optimization points, completing the multimodal matching task after several iterations, and successfully calculating the road camera position with 10° and 15m accuracy.