scholarly journals Enhancing User Experiences of Mobile-Based Augmented Reality via Spatial Augmented Reality: Designs and Architectures of Projector-Camera Devices

2018 ◽  
Vol 2018 ◽  
pp. 1-17 ◽  
Author(s):  
Thitirat Siriborvornratanakul
Keyword(s):  
Augmented Reality ◽  
User Experience ◽  
Fundamental Problem ◽  
User Experiences ◽  
Technical Problems ◽  
Digital World ◽  
Spatial Augmented Reality ◽  
Computing Paradigm ◽  
Technical Issues ◽  
Hardware Designs

As smartphones, tablet computers, and other mobile devices have continued to dominate our digital world ecosystem, there are many industries using mobile or wearable devices to perform Augmented Reality (AR) functions in their workplaces in order to increase productivity and decrease unnecessary workloads. Mobile-based AR can basically be divided into three main types: phone-based AR, wearable AR, and projector-based AR. Among these, projector-based AR or Spatial Augmented Reality (SAR) is the most immature and least recognized type of AR for end users. This is because there are a small number of commercial products providing projector-based AR functionalities in a mobile manner. Also, prices of mobile projectors are still relatively high. Moreover, there are still many technical problems regarding projector-based AR that have been left unsolved. Nevertheless, it is projector-based AR that has potential to solve a fundamental problem shared by most mobile-based AR systems. Also the always-visible nature of projector-based AR is one good answer for solving current user experience issues of phone-based AR and wearable AR systems. Hence, in this paper, we analyze what are the user experience issues and technical issues regarding common mobile-based AR systems, recently widespread phone-based AR systems, and rising wearable AR systems. Then for each issue, we propose and explain a new solution of how using projector-based AR can solve the problems and/or help enhance its user experiences. Our proposed framework includes hardware designs and architectures as well as a software computing paradigm towards mobile projector-based AR systems. The proposed design is evaluated by three experts using qualitative and semiquantitative research approaches.

Augmented reality–assisted pedicle screw insertion: a cadaveric proof-of-concept study

2019 ◽  
Vol 31 (1) ◽  
pp. 139-146 ◽  
Author(s):  
Camilo A. Molina ◽  
Nicholas Theodore ◽  
A. Karim Ahmed ◽  
Erick M. Westbroek ◽  
Yigal Mirovsky ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Pedicle Screw ◽  
User Experience ◽  
Pedicle Screws ◽  
Screw Insertion ◽  
Pedicle Screw Insertion ◽  
Insertion Method ◽  
Comparative Accuracy ◽  
Placement Accuracy ◽  
Surgical Field

OBJECTIVEAugmented reality (AR) is a novel technology that has the potential to increase the technical feasibility, accuracy, and safety of conventional manual and robotic computer-navigated pedicle insertion methods. Visual data are directly projected to the operator’s retina and overlaid onto the surgical field, thereby removing the requirement to shift attention to a remote display. The objective of this study was to assess the comparative accuracy of AR-assisted pedicle screw insertion in comparison to conventional pedicle screw insertion methods.METHODSFive cadaveric male torsos were instrumented bilaterally from T6 to L5 for a total of 120 inserted pedicle screws. Postprocedural CT scans were obtained, and screw insertion accuracy was graded by 2 independent neuroradiologists using both the Gertzbein scale (GS) and a combination of that scale and the Heary classification, referred to in this paper as the Heary-Gertzbein scale (HGS). Non-inferiority analysis was performed, comparing the accuracy to freehand, manual computer-navigated, and robotics-assisted computer-navigated insertion accuracy rates reported in the literature. User experience analysis was conducted via a user experience questionnaire filled out by operators after the procedures.RESULTSThe overall screw placement accuracy achieved with the AR system was 96.7% based on the HGS and 94.6% based on the GS. Insertion accuracy was non-inferior to accuracy reported for manual computer-navigated pedicle insertion based on both the GS and the HGS scores. When compared to accuracy reported for robotics-assisted computer-navigated insertion, accuracy achieved with the AR system was found to be non-inferior when assessed with the GS, but superior when assessed with the HGS. Last, accuracy results achieved with the AR system were found to be superior to results obtained with freehand insertion based on both the HGS and the GS scores. Accuracy results were not found to be inferior in any comparison. User experience analysis yielded “excellent” usability classification.CONCLUSIONSAR-assisted pedicle screw insertion is a technically feasible and accurate insertion method.

Spatial augmented reality

2020 ◽  
Author(s):  
Tim Bosch ◽  
Gu van Rhijn ◽  
Frank Krause ◽  
Reinier Könemann ◽  
Ellen S. Wilschut ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Spatial Augmented Reality

The quality of user experiences for mobile recommendation systems: an end-user perspective

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Woon Kian Chong ◽  
Zhuang Ma
Keyword(s):  
Social Norms ◽  
User Experience ◽  
Online Survey ◽  
Recommendation Systems ◽  
User Involvement ◽  
Sample Population ◽  
User Experiences ◽  
Content Type ◽  
Involvement Theory

PurposeThis paper attempts to identify key factors (i.e., personalization, privacy awareness and social norms) that affect user experiences (UXs) of mobile recommendation systems according to the user involvement theory (push-based and pull-based) and their relationships.Design/methodology/approachThe study is based on an online survey with students from an international business school located in southwestern China. The sample population for the study included randomly selected 600 university students who are active mobile phone users. A total of 470 questionnaires were returned; 456 were valid (14 were invalid due to the incompleteness of their responses), providing a response rate of 65%.FindingsSocial norms have the largest impact on user experience quality, followed by personalization and privacy awareness. User involvement in mobile recommendation systems has mediating effects on the above relationships, with larger effects on pull-based systems than on push-based systems.Originality/valueThis study provides an integrated framework for researchers to measure the effects of social, personal and risk factors on the quality of user experience. The results enrich the literature on user involvement, mobile recommendation systems and UX. The findings provide significant implications for both retailers and developers of mobile recommendation systems.

Interactive Dance Support System Using Spatial Augmented Reality

2021 ◽  
Author(s):  
Yi He ◽  
Xiaojie Zheng ◽  
Asuka Yagami ◽  
Yichen Peng ◽  
Shogo Yoshida ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Support System ◽  
Spatial Augmented Reality

scholarly journals User Experience of Augmented Reality System for Astronaut's Manual Work Support

2018 ◽  
Vol 5 ◽  
Author(s):  
Kaj Helin ◽  
Timo Kuula ◽  
Carlo Vizzi ◽  
Jaakko Karjalainen ◽  
Alla Vovk
Keyword(s):  
Augmented Reality ◽  
User Experience ◽  
Manual Work ◽  
Work Support ◽  
Augmented Reality System

Visual Coherence in Mixed Reality: A Systematic Enquiry

2017 ◽  
Vol 26 (1) ◽  
pp. 16-41 ◽  
Author(s):  
Jonny Collins ◽  
Holger Regenbrecht ◽  
Tobias Langlotz
Keyword(s):  
Augmented Reality ◽  
Mixed Reality ◽  
Focus Of Attention ◽  
User Experiences ◽  
Head Mounted Display ◽  
Virtual And Augmented Reality

Virtual and augmented reality, and other forms of mixed reality (MR), have become a focus of attention for companies and researchers. Before they can become successful in the market and in society, those MR systems must be able to deliver a convincing, novel experience for the users. By definition, the experience of mixed reality relies on the perceptually successful blending of reality and virtuality. Any MR system has to provide a sensory, in particular visually coherent, set of stimuli. Therefore, issues with visual coherence, that is, a discontinued experience of a MR environment, must be avoided. While it is very easy for a user to detect issues with visual coherence, it is very difficult to design and implement a system for coherence. This article presents a framework and exemplary implementation of a systematic enquiry into issues with visual coherence and possible solutions to address those issues. The focus is set on head-mounted display-based systems, notwithstanding its applicability to other types of MR systems. Our framework, together with a systematic discussion of tangible issues and solutions for visual coherence, aims at guiding developers of mixed reality systems for better and more effective user experiences.

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