This paper proposes a local point cloud map-based Web augmented reality(AR)indoor navigation system solution.By delivering the local point cloud map to the web front end for positioning,the real-time positioning can b...This paper proposes a local point cloud map-based Web augmented reality(AR)indoor navigation system solution.By delivering the local point cloud map to the web front end for positioning,the real-time positioning can be implemented only with the help of the computing power of the web front end.In addition,with the characteristics of short time consumption and accurate positioning,an optimization solution to the local point cloud map is proposed,which includes specific measures such as descriptor de-duplicating and outlier removal,thus improving the quality of the point cloud.In this document,interpolation and smoothing effects are introduced for local map positioning,enhancing the anchoring effect and improving the smoothness and appearance of user experience.In small-scale indoor scenarios,the positioning frequency on an iPhone 13 can reach 30 fps,and the positioning precision is within 50 cm.Compared with an existing mainstream visual-based positioning manner for AR navigation,this specification does not rely on any additional sensor or cloud computing device,thereby greatly saving computing resources.It takes a very short time to meet the real-time requirements and provide users with a smooth positioning effect.展开更多
针对虚拟现实与增强现实技术在教育领域研究的兴起,以及国外在该领域研究起步较早且处于领先优势的现状,本研究以Web of Science数据库中2014-2019年间收录的相关英文文献为研究对象,对文献总体趋势进行分析,之后借助CiteSpace软件进行...针对虚拟现实与增强现实技术在教育领域研究的兴起,以及国外在该领域研究起步较早且处于领先优势的现状,本研究以Web of Science数据库中2014-2019年间收录的相关英文文献为研究对象,对文献总体趋势进行分析,之后借助CiteSpace软件进行可视化分析。结果表明,英美话语体系国家在该领域的研究处于优势地位,以理工科类教育为主导,且多基于框架来构造模型并进行试验成果应用。由此得到我国在虚拟现实与增强现实技术教育研究的五大启示:加强交流与合作,多方位合力提升研究水平;取精去糟,扎根细化研究流程;促进多学科领域融合,坚持科学性与人文性相统一;力促新老技术协同创新,推进VR/AR教育游戏设计开发;延伸各方监督,适度虚拟以拥抱现实。展开更多
With the growing aging population, age-related diseases have increased considerably over the years.In response to these, Ambient Assistive Living（AAL） systems are being developed and are continually evolving to enri...With the growing aging population, age-related diseases have increased considerably over the years.In response to these, Ambient Assistive Living（AAL） systems are being developed and are continually evolving to enrich and support independent living. While most researchers investigate robust Activity Recognition（AR）techniques, this paper focuses on some of the architectural challenges of the AAL systems. This work proposes a system architecture that fuses varying software design patterns and integrates readily available hardware devices to create Wireless Sensor Networks（WSNs） for real-time applications. The system architecture brings together the Service-Oriented Architecture（SOA）, semantic web technologies, and other methods to address some of the shortcomings of the preceding system implementations using off-the-shelf and open source components. In order to validate the proposed architecture, a prototype is developed and tested positively to recognize basic user activities in real time. The system provides a base that can be further extended in many areas of AAL systems,including composite AR.展开更多
基金supported in part by ZTE Industry⁃University⁃Institute Coop⁃eration Funds.
文摘This paper proposes a local point cloud map-based Web augmented reality(AR)indoor navigation system solution.By delivering the local point cloud map to the web front end for positioning,the real-time positioning can be implemented only with the help of the computing power of the web front end.In addition,with the characteristics of short time consumption and accurate positioning,an optimization solution to the local point cloud map is proposed,which includes specific measures such as descriptor de-duplicating and outlier removal,thus improving the quality of the point cloud.In this document,interpolation and smoothing effects are introduced for local map positioning,enhancing the anchoring effect and improving the smoothness and appearance of user experience.In small-scale indoor scenarios,the positioning frequency on an iPhone 13 can reach 30 fps,and the positioning precision is within 50 cm.Compared with an existing mainstream visual-based positioning manner for AR navigation,this specification does not rely on any additional sensor or cloud computing device,thereby greatly saving computing resources.It takes a very short time to meet the real-time requirements and provide users with a smooth positioning effect.
文摘针对虚拟现实与增强现实技术在教育领域研究的兴起,以及国外在该领域研究起步较早且处于领先优势的现状,本研究以Web of Science数据库中2014-2019年间收录的相关英文文献为研究对象,对文献总体趋势进行分析,之后借助CiteSpace软件进行可视化分析。结果表明,英美话语体系国家在该领域的研究处于优势地位,以理工科类教育为主导,且多基于框架来构造模型并进行试验成果应用。由此得到我国在虚拟现实与增强现实技术教育研究的五大启示:加强交流与合作,多方位合力提升研究水平;取精去糟,扎根细化研究流程;促进多学科领域融合,坚持科学性与人文性相统一;力促新老技术协同创新,推进VR/AR教育游戏设计开发;延伸各方监督,适度虚拟以拥抱现实。
基金partially supported by EU H2020 Marie Sklodowska-Curie ActionsITNETN(ACROSSING Project ID:676157)Research Investment Fund,DMU
文摘With the growing aging population, age-related diseases have increased considerably over the years.In response to these, Ambient Assistive Living（AAL） systems are being developed and are continually evolving to enrich and support independent living. While most researchers investigate robust Activity Recognition（AR）techniques, this paper focuses on some of the architectural challenges of the AAL systems. This work proposes a system architecture that fuses varying software design patterns and integrates readily available hardware devices to create Wireless Sensor Networks（WSNs） for real-time applications. The system architecture brings together the Service-Oriented Architecture（SOA）, semantic web technologies, and other methods to address some of the shortcomings of the preceding system implementations using off-the-shelf and open source components. In order to validate the proposed architecture, a prototype is developed and tested positively to recognize basic user activities in real time. The system provides a base that can be further extended in many areas of AAL systems,including composite AR.
