Holger Regenbrecht

Holger Regenbrecht
University of Otago · Department of Information Science

About

160
Publications
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4,753
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Publications

Publications (160)
Article
Full-text available
Content creators have been trying to produce engaging and enjoyable Cinematic Virtual Reality (CVR) experiences using immersive media such as 360-degree videos. However, a complete and flexible framework, like the filmmaking grammar toolbox for film directors, is missing for creators working on CVR, especially those working on CVR storytelling with...
Chapter
This chapter is a collection of selected VR/AR case studies from academia and industry.
Article
With recent technological advancements in sports broadcasting, remote spectators are presented with an enriched experience. These enriched experiences include additional content such as statistics and graphics that support game understanding. However, these technological advancements are often not accessible to on-site sports spectators. In this pa...
Preprint
Full-text available
Developing, evaluating, and disseminating IT research prototypes for and with indigenous partners is both challenging and rewarding. In conjunction with our domain expert collaborators, Te Rau Aroha Marae (Bluff, Aotearoa/New Zealand) and our academic colleagues at the universities of Waikato and Canterbury, we are implementing a mixed reality tele...
Preprint
Full-text available
Developing, evaluating, and disseminating IT research prototypes for and with indigenous partners is both challenging and rewarding. In conjunction with our domain expert collaborators, Te Rau Aroha Marae (Bluff, Aotearoa/New Zealand) and our academic colleagues at the universities of Waikato and Canterbury, we are implementing a mixed reality tele...
Article
Full-text available
We have developed a novel and affordable way to texture virtual hands from individually taken photographs and integrated the virtual hands into a mixed reality neurorehabilitation system. This mixed reality system allows for serious game play with mirrored and non-mirrored hands, designed for patients with unilateral motor impairments. Before we ca...
Article
Full-text available
Cinematic Virtual Reality (CVR) is a form of immersive storytelling widely used to create engaging and enjoyable experiences. However, issues related to the Narrative Paradox and Fear of Missing Out (FOMO) can negatively affect the user experience. In this paper, we review the literature about designing CVR content with the consideration of the vie...
Article
Full-text available
Volumetric videos allow for a true three-dimensional experience where users can freely choose their viewing angles and be actually immersed in a video clip. High quality video productions are gaining attention and first volumetric video recordings are commercially provided at select places. Unfortunately, the production process is very time, labour...
Article
Immersive Virtual Reality (VR) has shown to be effective in general training and learning applications, but whether it has potential in understanding and learning complex topics is not well researched. In addition, the role of users’ expertise in VR-based learning is not really understood. Here we present findings from our purpose-designed immersiv...
Preprint
Augmented Reality (AR) enriches a user's real environment by adding spatially aligned virtual objects (3D models, 2D textures, textual annotations, etc) by means of special display technologies. These are either worn on the body or placed in the working environment. From a technical point of view, AR faces three major challenges: (1) to generate a...
Article
Full-text available
The desire to stay connected to one another over large distances has guided decades of telepresence research. Most focuses on stationary solutions that can deliver high-fidelity telepresence experiences, but these are usually impractical for the wider population who cannot afford the necessary proprietary equipment or are unwilling to regress to no...
Article
Full-text available
In recent years, the development of Augmented Reality (AR) frameworks made AR application development widely accessible to developers without AR expert background. With this development, new application fields for AR are on the rise. This comes with an increased need for visualization techniques that are suitable for a wide range of application are...
Conference Paper
Full-text available
The Ātea project is investigating how technology can be used to help Māori share and preserve knowledge, culture, and language. One aspect of this is the use of telepresence systems to connect members of an iwi (tribe) or rūnanga (council) with their marae (meeting place, communal centre) and community. We describe the range of interactions we can...
Conference Paper
Traditional sports events related data have no direct spatial relationship to what spectators see when attending a live sports event. The idea of our work is to address this gap and ultimately to provide spectators insights of a sports game by embedding sports statistics into their field of view of the game using mobile Augmented Reality. Research...
Article
Full-text available
Background Providing timely follow-up care for patients with inflammatory bowel disease in remission is important but often difficult because of resource limitations. Using smartphones to communicate symptoms and biomarkers is a potential alternative. We aimed to compare outpatient management using 2 smartphone apps (IBDsmart for symptoms and IBDoc...
Article
Augmented Reality (AR) sandtables facilitate the shaping of sand to form a surface that is transformed into a digital terrain map which is projected back onto the sand. Although a mature technology, there are still few instances of sandtables being used in surface analysis. Fundamentally there has not been any reported formal assessment of how well...
Chapter
Full-text available
There are many techniques for locomotion and navigation that can support the exploration of large virtual environments in a limited physical area. Previous studies focused on measuring curvature gains and bending gains applied to the walking direction in the real world. However, the effects of different moving techniques and their relationship with...
Article
Objective We describe a networked, two-user virtual reality (VR) power wheelchair (PWC) simulator system in which an actor (client) and an observer (clinician) meet. We then present a study with 15 observers (expert clinicians) evaluating the effect of three principal forms of viewpoint control (egocentric-egomotion, egocentric-tethered, and client...
Article
Full-text available
For mixed reality applications, where reality and virtual reality are spatially merged and aligned in interactive real-time, we propose a pure voxel representation as a rendering and interaction method of choice. We show that voxels—gap-less volumetric pixels in a regular grid in space—allow for an actual user experience of a mixed reality environm...
Article
Full-text available
The mobility and ubiquity of mobile head-mounted displays make them a promising platform for telepresence research asthey allow for spontaneous and remote use cases not possible with stationary hardware. In this work we present a system that providesimmersive telepresence and remote collaboration on mobile and wearable devices by building a live sp...
Article
Full-text available
Recent advancements in computing research and technology will allow future immersive virtual reality systems to be voxel-based, i.e. entirely based on gap-less, spatial representations of volumetric pixels. The current popularity of pixel-based videoconferencing systems could turn into true telepresence experiences that are voxel-based. Richer, non...
Conference Paper
Many categories of the illusion of self-motion have been widely studied with the potential support of virtual reality. However, the effects of directly and indirectly powering the movement on the possibility of perceiving changes in moving speed and their relationship with sensory feedback on users' speed change perception have not been investigate...
Article
In this special issue of IEEE Transactions on Visualization and Computer Graphics (TVCG) , we are pleased to present the TVCG papers from the 17th IEEE International Symposium on Mixed and Augmented Reality (ISMAR 2018), held October 16–20 in Munich, Germany. ISMAR continues the 20-year long tradition of IWAR, ISMR, and ISAR, and is undoubtedly t...
Conference Paper
Full-text available
Prescription glasses are used by many people as a simple, and even fashionable way, to correct refractive problems of the eye. However, there are other visual impairments that cannot be treated with an optical lens in conventional glasses. In this work we present ChromaGlasses, Computational Glasses using optical head-mounted displays for compensat...
Conference Paper
Full-text available
Given the advancements in ubiquitous computing we can nowadays link information to places and objects anywhere on the globe. For years, map-based interfaces have been the primary interfaces to browse and retrieve this situated media. While more recently also other interface concepts for situated media have found their way out of the research labs,...
Article
Purpose: New rehabilitation strategies for post-stroke upper limb rehabilitation employing visual stimulation show promising results, however, cost-efficient and clinically feasible ways to provide these interventions are still lacking. An integral step is to translate recent technological advances, such as in virtual and augmented reality, into th...
Article
The experience of Virtual Reality (VR) can lead to unwanted or wanted psychological stress reactions. Highly immersive VR games for instance utilise extreme, life-threatening, or dangerous situations to achieve those responses from their players. There is also sufficient evidence that in clinical settings and specific situations, such as fear of he...
Article
Full-text available
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 perc...
Article
Virtual Reality based driving simulators are increasingly used to train and assess users’ abilities to operate vehicles in a controlled and safe way. For the development of those simulators it is important to identify and evaluate design factors affecting perception, behaviour, and driving performance. In an exemplary power wheelchair simulator set...
Chapter
Virtual reality-based power wheelchair simulators can help potential users to be assessed and trained in a safe and controlled environment. Although now widely used and researched for several decades, many properties of virtual environments are still not yet fully understood. In this chapter, we evaluated the effects of the visual representation of...
Conference Paper
Full-text available
Virtual reality-based power wheelchair simulators can help potential users to be assessed and trained in a safe and controlled environment. Although now widely used and researched for several decades, many properties of virtual environments are still not yet fully understood. In this study, we evaluated the effects of the visual representation of t...
Article
Full-text available
Optical see-through head-mounted displays are currently seeing a transition out of research labs towards the consumeroriented market. However, whilst availability has improved and prices have decreased, the technology has not matured much. Most commercially available optical see-through head mounted displays follow a similar principle and use an op...
Article
Full-text available
Augmented Reality is a technique that enables users to interact with their physical environment through the overlay of digital information. While being researched for decades, more recently, Augmented Reality moved out of the research labs and into the field. While most of the applications are used sporadically and for one particular task only, cur...
Conference Paper
Full-text available
Collaborative Virtual Environments (CVE) with co-located or remote video communication functionality require a continuous experience of social presence. If, at any stage during the experience the communication interrupts presence then the CVE experience as a whole is affected - spatial presence is then decoupled from social presence. We present a s...
Article
Full-text available
Background: Colorectal cancer (CRC) has a high incidence, especially in New Zealand. The reasons for this are unknown. While most cancers develop sporadically, a positive family history, determined by the number and age at diagnosis of affected first and second degree relatives with CRC is one of the major factors, which may increase an individual...
Conference Paper
Research output metrics, in particular for peer-reviewed publications are of increasingly high importance for academics' careers. In Human-Computer Interaction (HCI) and related fields of research, like Computer Graphics and Multimedia, simple to use and objective measures like Thomson Reuter's impact factors aren't applicable. Ranking lists like t...
Conference Paper
Full-text available
Providing portable and affordable virtual reality systems for upper limb stroke rehabilitation is still a challenge. Here we present a simple user interface that allows the integration of various upper limb stroke exercises that can be autonomously performed by patients without the presence of a therapist, yet is portable and assembled using afford...
Conference Paper
New rehabilitation strategies for post-stroke upper limb rehabilitation employing visual stimulation show promising results. Cost-efficient ways to provide these techniques are still a challenge. Virtual and Augmented Reality Technologies could be suitable for this endeavor. Recent technological advances often are not translated into therapeutic pr...
Chapter
The use of virtual reality technology can lead to better controlled and flexible forms of physical assessment and therapy, which can be more motivating for patients. The Nine Hole Peg Test (NHPT) is a standard instrument to practice and assess a patient's hand motor control abilities. A physical, wooden or plastic board with nine holes and cylindri...
Poster
Full-text available
Most interactive input devices for virtual reality-based simulators are proprietary and expensive. Can they be substituted with standard, inexpensive devices if the virtual representation of the input device looks and acts like the original? Visual dominance theory would appear to support such a possibility. According to this view the visual aspect...
Article
Full-text available
Videoconferencing allows geographically dispersed parties to communicate by simultaneous audio and video transmissions. It is used in a variety of application scenarios with a wide range of coordination needs and efforts, such as private chat, discussion meetings, and negotiation tasks. In particular, in scenarios requiring certain levels of trust...
Poster
Augmented Reflection Technology for Autonomous Upper Limb Stroke Rehabilitation
Conference Paper
Full-text available
There is increasing demand to improve the quality and efficiency of healthcare delivery. Mobile health self- reporting can play a vital role here, provided that user acceptance can be achieved. We developed a mobile health reporting app for patients suffering from inflammatory bowel diseases and tested its acceptance, perceived usefulness and usabi...
Conference Paper
Full-text available
Videoconferencing systems available for end users do not allow for eye-to-eye contact between participants. The different locations of video camera and video display make it impossible to directly look into each others eyes. This issue is known as the lack of mutual gaze. Combined with a lack of a life-sized video image of the communication partner...
Chapter
This paper evaluates the patient engagement and clinical feasibility of an Augmented Reflection Technology (ART) system for use in physical rehabilitation of the upper limb following stroke. In particular, TheraMem, an extension of the ART system, was assessed on its potential to engage patients in meaningful therapeutic exercise. Six patients part...
Article
Augmented Reality (AR) has the potential to change the way therapy and rehabilitation is understood and administered. It can be used to manipulate the experience of reality resulting in novel rehabilitative applications including but not limited to augmented mirror box manipulations. We present a conceptual framework for the effective use of AR in...