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Virtual Reality and Augmented Reality Head-Mounted Displays (HMDs) have been emerging in the last years. These technologies sound like the new hot topic for the next years. Head-Mounted Displays have been developed for many different... more
This paper proposes a novel 'Visuo-Haptic Display' using a Head-Mounted Projector (HMP) with X'tal Vision optics. Our goal is to develop the device which enables an observer to touch a virtual object just as it is seen. We describe the... more
Virtual reality (VR) systems are becoming increasingly attractive as joint kinematics monitoring systems during rehabilitation. This study aimed to evaluate the accuracy of the Oculus Quest 2 in measuring translational and rotational... more
Background: The application of virtual and augmented reality technologies to orthopaedic surgery training and practice aims to increase the safety and accuracy of procedures and reducing complications and costs. The purpose of this... more
This study assessed the value of two video configurations-a head-mounted camera with eye tracking capability and a scene camera providing a view of the work environment-on remote collaboration on physical (3D) tasks. Pairs of participants... more
Despite its potential gaze interaction is still not a widely-used interaction concept. Major drawbacks as the calibration, strain of the eyes and the high number of false alarms are associated with gaze based interaction and limit its... more
Virtual Reality (VR) is a cutting-edge technology that generates immersive, interactive, three- dimensional environments in which users can engage in simulated experiences. VR, which first gained popularity in the entertainment... more
Technological advances in Total Knee Arthroplasty (TKA) have been shown to enhance surgical precision, patient outcomes, and efficiency. New computer-assisted surgery solutions using Augmented Reality (AR) support TKA by locating objects... more
This paper presents a non-intrusive method for gaze tracking, using a single monocular low-resolution camera. By tracking the face orientation and the center of the pupil, the system estimates the gaze direction which can be projected... more
and radiopacity in a water-filled phantom. Improved kink radii compared to a commercial catheter demonstrated a device that could maintain lumen patency during navigation. Device construction featured simple manufacturing steps to produce... more
D istributed systems tec hno logies supporti ng 3D visualizati on and social collabo rati on w ill be increasing in frequenc y and type over t ime. An emerging type of head-mou nted display referred t o as t he head-m oun t ed project ion... more
The goals ofthis research are to measure accuracy and precision ofdepth perception of3D objects in see-through head-mounted displays for near-field visualization (i.e. within arm length) and to set benchmarks for current technology. In... more
This study presents a VR-based educational application designed to enhance students' understanding of mechanical systems, focusing on crank-slider mechanisms, oscillating slides, crank-piston systems, and four-bar linkages. The... more
Purpose-To describe the various types of head-mounted display technology, their optical and human factors considerations, and their potential for use in low vision rehabilitation and vision enhancement. Methods-An overview of head-mounted... more
This paper describes a new Augmented Reality (AR) system called HoloLens developed by Microsoft, and the interaction model for supporting collaboration in this space with other users. Whereas traditional AR collaboration is between two or... more
The concept and instantiation of Real-Time Tomographic Holography (RTTH) for augmented reality is presented. RTTH enables natural hand-eye coordination to guide invasive medical procedures without requiring tracking or a head-mounted... more
This paper reports empirical results from a study on the impact of the KatWalk virtual reality omnidirectional treadmill on the user experience. The omnidirectional treadmill is a mechanical device, that allows the user to perform... more
The primary aim of this study was to evaluate the effect of auditory feedback in a VR system planned for clinical use and to address the different factors that should be taken into account in building a bimodal virtual environment (VE).... more
Augmented Reality (AR) and Mixed Reality (MR) have been two of the most explosive research topics in the last few years. Head-Mounted Devices (HMDs) are essential intermediums for using AR and MR technology, playing an important role in... more
With advances in Virtual Reality (VR) technology, user expectation for a near-perfect experience is also increasing. The push for a wider field-of-view can increase the challenges of correcting lens distortion. Past studies on imperfect... more
Past research has shown that text input methods must be quick, efficient, and involve little to no learning in order for them to be accepted in a consumer market. The Microsoft HoloLens is a mixed reality head-mounted display (HMD) that... more
This paper aims to investigate cybersickness (CS) in prolonged exposure to VR simulations, a condition that affects individuals who engage in long-term VR experiences. Cybersickness symptoms encompass oculomotor strain, nausea,... more
Virtual Reality is an upcoming trend in games and entertainment applications as the use of head-mounted displays becomes accessible for the mass market. These systems aim to provide immersive experiences, but they still do not offer a... more
Walking in a Virtual Environment is a bounded task. It is challenging for a subject to navigate a large virtual environment designed in a limited physical space. External hardware support may be required to achieve such an act in a... more
Virtual reality games/films/applications bring new challenges to conventional film grammar and design principles, due to more spatial freedom available to users in 6-DOF Head-Mounted Display (HMD). This paper introduces a simple model of... more
Omnidirectional video (ODV) is a medium that offers the viewer a 360-degree panoramic video view of the recorded setting. In recent years, various novel platforms for presenting such content have emerged. Many of these applications aim to... more
Today’s Minimally Invasive Surgery (MIS) is performed by inserting an endoscope along with long stem surgical tools into the incision holes in the patient’s body to capture real-time images. Although MIS has many advantages compared to an... more
Extend the application of the cube overlay system for registration of pre-operative scans to live endoscope images.
We propose a Tone Mapping Operator, denoted HMD-TMO, dedicated to the visualization of 360 • High Dynamic Range images on Head Mounted Displays. The few existing studies about this topic have shown that the existing Tone Mapping Operators... more
SimSensei is a Virtual Human (VH) interviewing platform that uses off-the-shelf sensors (i.e., webcams, Microsoft Kinect and a microphone) to capture and interpret real-time audiovisual behavioral signals from users interacting with the... more
Humans routinely modify their walking speed to adapt to functional goals and physical demands. However, damage to the central nervous system (CNS) often results in abnormal modulation of walking speed and increased risk of falls. There is... more
IntroductionVirtual Reality (VR) is a tool that is increasingly used in the aging population. Head-Mounted Displays (HMDs) are stereoscopic vision devices used for immersive VR. Cybersickness is sometimes reported after head-mounted... more
D istributed systems tec hno logies supporti ng 3D visualizati on and social collabo rati on w ill be increasing in frequenc y and type over t ime. An emerging type of head-mou nted display referred t o as t he head-m oun t ed project ion... more
We are experiencing an upcoming trend of using head mounted display systems in games and serious games, which is likely to become an established practice in the near future. While these systems provide highly immersive experiences, many... more
We are experiencing an upcoming trend of using head mounted display systems in games and serious games, which is likely to become an established practice in the near future. While these systems provide highly immersive experiences, many... more
Global interest in applying virtual reality (VR) in research and medicine has grown signi cantly, with potential bene ts for patients suffering from balance disorders, instability, and a high risk of falling. This exploratory study... more
At time of writing, several affordable Head-Mounted Displays (HMD) are going to be released to the mass market, most of them for Virtual Reality (VR with Oculus Rift, Samsung Gear…) but also for indoor Augmented Reality (AR) with... more
An Extra-Vehicular Activity (EVA) is one of the most challenging operations during spaceflight. The current technology utilized during a spacewalk by an astronaut crewmember includes real-time voice loops and physical cuff checklists with... more
Many studies on distance perception in a virtual environment exist. Most of them were conducted using head-mounted displays (HMD) and less with large screen displays such as CAVE systems. In this paper, we propose to measure the accuracy... more
The purpose of the present study is to clarify whether tilted scenery presented through an immersive head-mounted display (HMD) causes the inclination of standing posture. [Subjects and Methods] Eleven healthy young adult males who... more
Hardware and software resources nowadays make possible new Virtual Reality (VR) interaction methods. Numerous challenges have been involved over the years, and one of the most interesting is locomotion in virtual environments. In... more