Virtual Reality and Mixed Reality: 18th EuroXR International Conference, EuroXR 2021, Milan, Italy, November 24–26, 2021, Proceedings (Image ... Vision, Pattern Recognition, and Graphics)

This book constitutes the refereed proceedings of the 18th International Conference on Virtual Reality and Mixed Reality, EuroXR 2021, held in Valencia, Spain, in November 2021. The 8 full and 4 short papers were carefully reviewed and selected from 31 submissions. The conference presents contributions on virtual reality, mixed reality, augmented reality, collaborative virtual environment, tangible user interface, CAD model processing, and others. The papers are organized in the blocks named: ​Perception and Cognition; Interactive Techniques; Tracking and Rendering; Use case and User study; Short papers. Preface Organization Contents Perception and Cognition (Scientific Session 1) Comfort and Sickness While Virtually Aboard an Autonomous Telepresence Robot 1 Introduction 2 Related Work 3 Methods 3.1 Setup and Test Paths 3.2 Participants 3.3 Measures 3.4 Procedure 4 Results 4.1 Quantitative Data 4.2 Qualitative Data 5 Discussion 5.1 Limitations and Future Work 6 Conclusion References Can You Perceive the Size Change? Discrimination Thresholds for Size Changes in Augmented Reality 1 Introduction 2 Related Work 2.1 Size Perception Augmented Objects 2.2 Two-Alternative Forced-Choice Method 3 Psychophysical Experiment 3.1 Pilot Study 3.2 Experiment 1: 0–7 Range Increasing 3.3 Experiment 2: 3–7 Range Increasing 4 Discussion 5 Conclusion References Interactive Techniques (Scientific Session 2) Tangible Interactions to Navigate Through Space and Time Inside a Virtual Environment 1 Introduction 2 Spatio-Temporal Representation 2.1 Temporal Representation in Activity Models 2.2 Models of Temporal Representation in the History of Science and Technology 2.3 Proposal for a Spatio-Temporal Representation Model for the Activities 3 Spatio-Temporal Navigation 3.1 Identification of the Functionalities 4 Interactions for Spatio-Temporal Navigation 4.1 Ideation and Prototyping Workshop 4.2 Evaluation of the Proposed Interactors 4.3 Implementing the Interactor 4.4 Interaction Scenarios 5 Conclusion References Continuous-Touch Text Entry for AR Glasses 1 Introduction 2 Related Work 2.1 Text Entry for HMDs 2.2 Smartphones as an Input Device 3 Interface Design 3.1 Continuous-Touch T9 (CTT9) 3.2 Continuous-Touch Dual Ring (CTDR) 3.3 Apparatus 4 Study 1 and System Optimizations 4.1 CTT9 Optimizations 4.2 CTDR Optimizations 5 User Study 2 5.1 Study Procedure 5.2 Measurements 5.3 Hypotheses 5.4 Results 6 Discussion 7 Conclusion References Tracking and Rendering (Scientific Session 3) A Simulation System for Scene Synthesis in Virtual Reality 1 Introduction 2 Related Work 2.1 Scene Synthesis Methods 2.2 System Integration and Methods Evaluation 3 Design 3.1 Data Capturing 3.2 Geometric Proxies 3.3 Rendering Methods 3.4 Evaluation 4 Implementation 4.1 Platform Introduction 4.2 Capturer 4.3 Processor 4.4 Renderer 4.5 Performance Aid 5 Experiment 5.1 Synthetic Datapoints Setup 5.2 Objective Metrics 5.3 Results 6 Discussion 7 Conclusion References Pose Tracking vs. Pose Estimation of AR Glasses with Convolutional, Recurrent, and Non-local Neural Networks: A Comparison 1 Introduction 2 Related Work 2.1 Object Pose Estimation 2.2 RNN-Based Pose Tracking 3 AR Glasses Pose Estimation and Tracking Architectures 3.1 AR Glasses Dataset and Preprocessing 3.2 CNN Baseline Methods 3.3 LSTM-Based Approaches 3.4 RNN with Non-local Blocks 3.5 Network Training 4 Evaluation 4.1 Dataset and Evaluation Metrics 4.2 Results 5 Conclusion References Use Case and User Study (Scientific Session 4) Building a Mobile AR Engagement Tool: Evaluation of Citizens Attitude Towards a Sustainable Future 1 Introduction 1.1 Citizen Engagement 1.2 AR for Engagement 2 Research Hypothesis 3 Methodology 3.1 Data Collection 3.2 Measures 4 System Design 4.1 System Architecture 4.2 Features, Content and Gamification Mechanisms 5 Results 5.1 Participants 5.2 Descriptive Statistics 5.3 Validation of Measures 5.4 Hypotheses Testing 5.5 External Variables 6 Conclusions References VR Simulation of Operating Procedure in Construction Based on BIM and Safety Ontology: A Proof of Concept 1 Introduction 2 Related Work 2.1 VR Training in AEC 2.2 Semantic Web and VR Applications 3 Methodology 3.1 System Overview 3.2 The Safety BIM Ontology (SBO) 3.3 Detailed Workflow 4 Case Study 4.1 General Use Case Description 4.2 Results and Discussion 5 Conclusion References Short Papers (Scientific Poster Session) Automating Generation of Kinematic Keypoints for Disassembly Process Toward Virtual Reality 1 Introduction 2 Virtual Reality Disassembly Concepts 2.1 Feature Based Approaches 2.2 Keypoints: Main Specification for Physics Engines 2.3 Extra Issues for Disassembly Process 3 Feature Recognition and Semantic Rules Approach 3.1 Feature Extraction from CAD Models 3.2 Semantic Rules Engine 4 Use Case 5 Results 6 Conclusion and Future Prospect References Social Virtual Reality: Implementing Non-verbal Cues in Remote Synchronous Communication 1 Introduction 2 System Architecture 2.1 Local Setup 2.2 Remote Communication 3 Usability Evaluation 4 Conclusions References Skill Level Monitoring Applied to AR Assisted Maintenance 1 Introduction 2 Literature Review 3 Experiment 3.1 Goals and Objectives 3.2 Overview 3.3 Material and Environment 3.4 Participants 3.5 Procedure 4 Preliminary Results 4.1 Parameters Recorded 4.2 Attention and Performances 4.3 Discussion 5 Conclusion References Immersive Serious Games for Learning Physics Concepts: The Case of Density 1 Introduction 2 Online Questionnaire 3 2D Game 4 Immersive 3D Game 5 Results 5.1 Online Questionnaire 5.2 2D Game 5.3 3D Game 6 Conclusions References Author Index