Real-Time 3D Reconstruction for Occlusion-Aware Interactions in Mixed Reality

Mixed Reality (MR) is a technology which enable to bring a virtual element into the real-world environment. MR intends to improve reality on the virtual world immerse onto real-world space. Occasionally the MR has been improved as the display technologies advanced progressively. In MR collaborative interface context, the local and remote user work together on collaborative task while sense the immersive environment in the cooperative application. User telepresence is an immersive telepresence, where the reconstruction of a human appears in a real-life. Up till now, producing full telepresence of the life-size human body may require a high transmission bandwidth of the internet. Therefore, this paper explores on a robust real-time 3D reconstruction method for MR telepresence. This paper discusses the previous works on the reconstruction method of a full-body human and the existing research works that have proposed the reconstruction methods for telepresence. Besides the 3D reconstruction method, this paper also enlightens our recent finding on the MR framework to transport a full-body human from a local location to a remote location. The MR telepresence will be discussed, as well as the robust 3D reconstruction method which has been implemented with user telepresence feature where the user experiences an accurate 3D representation of a remote person. The paper ends with the discussion and results, MR telepresence with robust 3D reconstruction method to execute user telepresence.

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Effects of the Size of Mixed-Reality Person Representations on Stress and Presence in Telecommunication

International Journal of Semantic Computing ◽

10.1142/s1793351x19400130 ◽

2019 ◽

Vol 13 (03) ◽

pp. 311-328

Author(s):

Michał Joachimczak ◽

Juan Liu ◽

Hiroshi Ando

Keyword(s):

3D Reconstruction ◽

Real Time ◽

Subjective Experience ◽

Mixed Reality ◽

Human Subjects ◽

Human Interaction ◽

Long Distance ◽

Job Interview ◽

Depth Sensors ◽

Sense Of Presence

We study how mixed reality (MR) telepresence can enhance long-distance human interaction and how altering 3D representations of a remote person can be used to modulate stress and anxiety during social interactions. To do so, we developed an MR telepresence system employing commodity depth sensors and Microsoft’s Hololens. A textured, polygonal 3D model of a person was reconstructed in real time and transmitted over network for rendering in remote location using HoloLens. In this study, we used mock job interview paradigm to induce stress in human–subjects interacting with an interviewer presented as an MR hologram. Participants were exposed to three different types of real-time reconstructed virtual holograms of the interviewer, a natural-sized 3D reconstruction (NR), a miniature 3D reconstruction (SR) and a 2D-display representation (LCD). Participants reported their subjective experience through questionnaires, while their biophysical responses were recorded. We found that the size of 3D representation of a remote interviewer had a significant effect on participants’ stress levels and their sense of presence. The questionnaire data showed that NR condition induced more stress and presence than SR condition and was significantly different from LCD condition. We also found consistent patterns in the biophysical data.

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Real-time mixed-reality telepresence via 3D reconstruction with HoloLens and commodity depth sensors

Proceedings of the 19th ACM International Conference on Multimodal Interaction - ICMI 2017 ◽

10.1145/3136755.3143031 ◽

2017 ◽

Cited By ~ 7

Author(s):

Michal Joachimczak ◽

Juan Liu ◽

Hiroshi Ando

Keyword(s):

3D Reconstruction ◽

Real Time ◽

Mixed Reality ◽

Depth Sensors

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Development of environment design support mixed reality system capable of environment estimation using deep learning

Impact ◽

10.21820/23987073.2020.2.9 ◽

2020 ◽

Vol 2020 (2) ◽

pp. 9-11

Author(s):

Tomohiro Fukuda

Keyword(s):

Deep Learning ◽

Real Time ◽

Computer Games ◽

Construction Projects ◽

Mixed Reality ◽

Semantic Segmentation ◽

Environment Design ◽

Aviation Training ◽

Architecture And Design ◽

World Environment

Mixed reality (MR) is rapidly becoming a vital tool, not just in gaming, but also in education, medicine, construction and environmental management. The term refers to systems in which computer-generated content is superimposed over objects in a real-world environment across one or more sensory modalities. Although most of us have heard of the use of MR in computer games, it also has applications in military and aviation training, as well as tourism, healthcare and more. In addition, it has the potential for use in architecture and design, where buildings can be superimposed in existing locations to render 3D generations of plans. However, one major challenge that remains in MR development is the issue of real-time occlusion. This refers to hiding 3D virtual objects behind real articles. Dr Tomohiro Fukuda, who is based at the Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering at Osaka University in Japan, is an expert in this field. Researchers, led by Dr Tomohiro Fukuda, are tackling the issue of occlusion in MR. They are currently developing a MR system that realises real-time occlusion by harnessing deep learning to achieve an outdoor landscape design simulation using a semantic segmentation technique. This methodology can be used to automatically estimate the visual environment prior to and after construction projects.

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Real-time, High-resolution Depth Upsampling on Embedded Accelerators

ACM Transactions on Embedded Computing Systems ◽

10.1145/3436878 ◽

2021 ◽

Vol 20 (3) ◽

pp. 1-22

Author(s):

David Langerman ◽

Alan George

Keyword(s):

High Resolution ◽

Low Power ◽

Real Time ◽

Mixed Reality ◽

Graphics Processing Unit ◽

Processing Unit ◽

Reconfigurable Logic ◽

Depth Sensors ◽

Time Requirements ◽

Graphics Processing

High-resolution, low-latency apps in computer vision are ubiquitous in today’s world of mixed-reality devices. These innovations provide a platform that can leverage the improving technology of depth sensors and embedded accelerators to enable higher-resolution, lower-latency processing for 3D scenes using depth-upsampling algorithms. This research demonstrates that filter-based upsampling algorithms are feasible for mixed-reality apps using low-power hardware accelerators. The authors parallelized and evaluated a depth-upsampling algorithm on two different devices: a reconfigurable-logic FPGA embedded within a low-power SoC; and a fixed-logic embedded graphics processing unit. We demonstrate that both accelerators can meet the real-time requirements of 11 ms latency for mixed-reality apps. 1

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Real-time Upper Body Reconstruction and Streaming for Mixed Reality Applications

2020 International Conference on Cyberworlds (CW) ◽

10.1109/cw49994.2020.00027 ◽

2020 ◽

Author(s):

Dimitrios Laskos ◽

Konstantinos Moustakas

Keyword(s):

Real Time ◽

Mixed Reality ◽

Upper Body

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Real-time 3D reconstruction of non-rigid shapes with a single moving camera

Computer Vision and Image Understanding ◽

10.1016/j.cviu.2016.05.004 ◽

2016 ◽

Vol 153 ◽

pp. 37-54 ◽

Cited By ~ 18

Author(s):

Antonio Agudo ◽

Francesc Moreno-Noguer ◽

Begoña Calvo ◽

J.M.M. Montiel

Keyword(s):

3D Reconstruction ◽

Real Time ◽

Moving Camera

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Real-Time Simultaneous 3D Reconstruction and Optical Flow Estimation

2018 IEEE Winter Conference on Applications of Computer Vision (WACV) ◽

10.1109/wacv.2018.00102 ◽

2018 ◽

Cited By ~ 4

Author(s):

Menandro Roxas ◽

Takeshi Oishi

Keyword(s):

3D Reconstruction ◽

Optical Flow ◽

Real Time ◽

Flow Estimation ◽

Optical Flow Estimation

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Real-Time Affective Measurements in Medical Education, Using Virtual and Mixed Reality

Brain Function Assessment in Learning - Lecture Notes in Computer Science ◽

10.1007/978-3-030-60735-7_9 ◽

2020 ◽

pp. 87-95

Author(s):

Panagiotis Antoniou ◽

George Arfaras ◽

Niki Pandria ◽

George Ntakakis ◽

Emmanuil Bambatsikos ◽

...

Keyword(s):

Medical Education ◽

Real Time ◽

Mixed Reality

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Digital matter as interdisciplinary commodity

The Journal of Public Space ◽

10.5204/jps.v2i3.119 ◽

2017 ◽

Vol 2 (3) ◽

pp. 103

Author(s):

Uwe Rieger

Keyword(s):

Real Time ◽

Spatial Data ◽

Architectural Design ◽

Large Scale ◽

Mixed Reality ◽

Digital Fabrication ◽

Digital Information ◽

Design Environment ◽

Digital World ◽

Starting Point

With the current exponential growth in the sector of Spatial Data Technology and Mixed Reality display devises we experience an increasing overlap of the physical and digital world. Next to making data spatially visible the attempt is to connect digital information with physical properties. Over the past years a number of research institutions have been laying the ground for these developments. In contemporary architecture architectural design the dominant application of data technology is connected to graphical presentation, form finding and digital fabrication. The arc/sec Lab for Digital Spatial Operations at the University of Auckland takes a further step. The Lab explores concepts for a new condition of buildings and urban patterns in which digital information is connected with spatial appearance and linked to material properties. The approach focuses on the step beyond digital re-presentation and digital fabrication, where data is re-connected to the multi-sensory human perceptions and physical skills. The work at the Lab is conducted in a cross disciplinary design environment and based on experiential investigations. The arc/sec Lab utilizes large-scale interactive installations as the driving vehicle for the exploration and communication of new dimensions in architectural space. The experiments are aiming to make data “touchable” and to demonstrate real time responsive environments. In parallel they are the starting point for both the development of practice oriented applications and speculation on how our cities and buildings might change in the future. The article gives an overview of the current experiments being undertaken at the arc/sec Lab. It discusses how digital technologies allow for innovation between the disciplines by introducing real time adaptive behaviours to our build environment and it speculates on the type of spaces we can construct when digital matter is used as a new dynamic building material.

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