The DXP Lab focuses on research and development in an unspecified area.

DXP Lab은 특정되지 않은 분야의 연구 개발에 중점을 둔다.

JourneyVR: Experience Design for Continuous Timed Activities in Virtual Reality

Mitigating Cyber and Motion Sickness with Haptic and Visual Feedback for VR Users in Autonomous Vehicle

The Impact of Observer Presence on Trainees' Mental States and Performance in Remote Military Training with Virtual Humans in Mixed Reality Environment

The Effects of Content-Aware Textured Reverse Motion Flow on Cybersickness and User Experience

A Study of 3D Character Control Methods_Keyboard, Speech, Hand Gesture, and Mixed Interfaces

Effect of Synchronized Vehicle Motion to Mitigating Sickness for On-Vehicle VR during Active Task Performance

Effect of virtual-reality-based education program for managing behavioral and psychological symptoms of dementia: A randomized controlled trial

Lifter for VR Headset: Enhancing Immersion, Presence, Flow, and Alleviating Mental and Physical Fatigue during Prolonged Use

ASAP for multi-outputs: auto-generating storyboard and pre-visualization with virtual actors based on screenplay

Keep Your Eyes on the Target: Enhancing Immersion and Usability by Designing Natural Object Throwing with Gaze-based Targeting

RPG: Rotation Technique in VR Locomotion using Peripheral Gaze

The Effects of False but Stable Heart Rate Feedback on Cybersickness and User Experience in Virtual Reality

Engaged and Affective Virtual Agents: Their Impact on Social Presence, Trustworthiness, and Decision-Making in the Group Discussion

The Effect of Directional Airflow toward Vection and Cybersickness

u-DFOV: User-Activated Dynamic Field of View Restriction for Managing Cybersickness and Task Performance

Super-Resolution AR: Enhanced Image Visibility for AR Imagery

PianoFMS: Real-time Evaluation of Cybersickness by Keyboard Fingering

The Effect of False but Stable Heart Rate Feedback via Sound and Vibration on VR User Experience

A Pilot Study on the Impact of Discomfort Relief Measures on Virtual Reality Sickness and Immersion

Walking-in-Flat-Place on Non-flat Virtual Environment can be Sickening!

The Effects of Customized Strategies for Reducing VR Sickness

Simple and Practical Dual Rendering for Reducing Eye Fatigue from Vergence-Accomodation Conflict in Stereoscopic Viewing

Sickness Reduction in FPV Drone Control: Improved Effects of Reverse Optical Flow with Static Landmarks Only

Directional Multimodal Flow to Help Mitigate VR Sickness

FakeBand: Virtual Band Music Performance with Balanced Interface for Individual Score/Rhythm Play and Inter-player Expression Coordination

Reducing VR Sickness by Directing User Gaze to Motion Singularity Point/Region as Effective Rest Frame

User Experience of Multi-Mode and Multitasked Extended Reality on Different Mobile Interaction Platforms

Dynamically Adjusted and Peripheral Visualization of Reverse Optical Flow for VR Sickness Reduction

Real-Time Facial Animation Generation on Face Mask

Leveraging VR Techniques for Efficient Exploration and Interaction in Large and Complex AR Space with Clipped and Small FOV AR Display

OnShipVR: Reducing Sea-sickness through Virtual Contents with Synchronized and Amplified Actual Ship Rotation

Focused Area of Movement as an Effective Rest Frame for Reducing VR Sickness

Reverse 3D Sound Flow Can Decrease VR Sickness?

Sparse Peripheral Counter-vection Flow Visualization with Reverse Optical Flow for VR Sickness Reduction

XR based Interaction: Leveraging on Virtual Digital Twin for Efficient Exploration with Small FOV Augmented Reality Glass

Real-time and On-line Removal of Moving Human Figures in Hand-held Mobile Augmented Reality

Mixing in Reverse Optical Flow to Mitigate Vection and Simulation Sickness in Virtual Reality

RideVR: Reducing Sickness for In-Car Virtual Reality by Mixed-in Presentation of Motion Flow Information

Adding Difference Flow between Virtual and Actual Motion to Reduce Sensory Mismatch and VR Sickness while Moving

The Effect of 2D Stylized Visualization of the Real World for Obstacle Avoidance and Safety in Virtual Reality System Usage

AudienceMR: Extending the Local Space for Large-Scale Audience with Mixed Reality for Enhanced Remote Lecturer Experience

CIRO: the effects of visually diminished real objects on human perception in handheld augmented reality

Auto-generating virtual human behavior by understanding user contexts

Silhouettes from real objects enable realistic interactions with a virtual human in mobile augmented reality

The impact of visual effects on user perception with a virtual human in augmented reality conflict situations

Efficient adversarial audio synthesis via progressive upsampling

Grabbing Pedestrian Attention with Interactive Signboard for Street Advertising

Interchanging the mode of display between desktop and immersive headset for effective and usable on-line learning

Balancing Body based and Discrete Interaction for Usability and Presence in Virtual Reality

Effects of gestural exaggeration to user experience in virtual reality

“Blurry Touch Finger”: Touch-Based Interaction for Mobile Virtual Reality with Clip-on Lenses

Effects of immersive virtual reality content type to mindfulness and physiological parameters

Effects of synchronized leg motion in walk-in-place utilizing deep neural networks for enhanced body ownership and sense of presence in vr

Roadvr: Mitigating the effect of vection and sickness by distortion of pathways for in-car virtual reality

Don’t bother me: how to handle content-irrelevant objects in handheld augmented reality

A SWOT analysis of the field of virtual reality rehabilitation and therapy

Immersive authoring of tangible augmented reality applications

Implementation and evaluation of “just follow me”: An immersive, VR-based, motion-training system

An object-oriented representation for product and design processes

Designing virtual reality systems the structured approach

Methods and apparatus of displaying and evaluating motion data in a motion game apparatus

Human–Computer Interaction: Fundamentals and Practice

Haptic control of a mobile robot: A user study

ARIoT: scalable augmented reality framework for interacting with Internet of Things appliances everywhere

Design and evaluation of a wind display for virtual reality

Immersive authoring: What you experience is what you get (wyxiwyg)

Occlusion based interaction methods for tangible augmented reality environments

Hand-held virtual reality: a feasibility study

The impact of avatar-owner visual similarity on body ownership in immersive virtual reality

Real-time depth-of-field rendering using anisotropically filtered mipmap interpolation

AR enabled IoT for a smart and interactive environment: A survey and future directions

Effects of haptic feedback, stereoscopy, and image resolution on performance and presence in remote navigation

Haptic teleoperation of a mobile robot: A user study

IoT+ AR: pervasive and augmented environments for “Digi-log” shopping experience

Evaluation of pointing techniques for ray casting selection in virtual environments

Gerard Jounghyun Kim

The use of virtual-reality technology in the areas of rehabilitation and therapy continues to grow, with encouraging results being reported for applications that address human physical, cognitive, and psychological functioning. This article presents a SWOT (Strengths, Weaknesses, Opportunities, and Threats) analysis for the field of VR rehabilitation and therapy. The SWOT analysis is a commonly employed framework in the business world for analyzing the factors that influence a company's competitive position in the marketplace with an eye to the future. However, the SWOT framework can also be usefully applied outside of the pure business domain. A quick check on the Internet will turn up SWOT analyses for urban-renewal projects, career planning, website design, youth sports programs, and evaluation of academic research centers, and it becomes obvious that it can be usefully applied to assess and guide any …

In this paper, we suggest a new approach for authoring tangible augmented reality applications, called 'immersive authoring.' The approach allows the user to carry out the authoring tasks within the AR application being built, so that the development and testing of the application can be done concurrently throughout the development process. We describe the functionalities and the interaction design for the proposed authoring system that are specifically targeted for intuitive specification of scenes and various object behaviors. Several cases of applications developed using the authoring system are presented. A small pilot user study was conducted to compare the proposed method to a non-immersive approach, and the results have shown that the users generally found it easier and faster to carry out authoring tasks in the immersive environment.

Training is usually regarded as one of the most natural application areas of virtual reality (VR). To date, most VR-based training systems have been situation based, but this paper examines the utility of VR for a different class of training: learning to execute exact motions, which are often required in sports and the arts. In this paper, we propose an interaction method, called Just Follow Me ( JFM ), that uses an intuitive “ghost” metaphor and a first-person viewpoint for effective motion training. Using the ghost metaphor (GM), JFM visualizes the motion of the trainer in real time as a ghost (initially superimposed on the trainee) that emerges from one's own body. The trainee who observes the motion from the first-person viewpoint “follows” the ghostly master as closely as possible to learn the motion. Our basic hypothesis is that such a VR system can help a student learn motion effectively and quickly, comparably to the …

We report on the development of a knowledge representation model, which is based on the SHARED object model reported in Shared Workspaces for Computer-Aided Collaborative Engineering (Wong, A. and Sriram, D., Technical Report, IESL 93-06, Intelligent Engineering Systems Laboratory, Department of Civil Engineering, MIT, March, 1993) and Research in Engineering Design (Wong, A. and Sriram, D., SHARED: An Information Model for Cooperative Product Development, 1993, Fall, 21-39). Our current model is implemented as a layered scheme, that incorporates both an evolving artifact and its associated design process. To represent artifacts as they evolve, we define objects recursively without a pre-defined granularity on this recursive decomposition. This eliminates the need for translations between levels of abstraction in the design process. The SHARED model extends traditional OOP in three ways …

The term ‘display’is usually associated with the ‘visual’output. However, in the context of virtual reality, one of whose goals is to mimic the way humans usually interact in the real world, it refers to any modality output, that is, visual, aural, haptic (a term referring to the sense of touch and force feedback), olfactory, thermal, taste, and so on. A VR system, in simulating an experience, may (and should strive to) generate various signals and stimulations in many modalities, and use various display devices to convey them to the human user. Ideally, the display devices should be ergonomically designed, have sufficient fidelity or resolution for the user, and match the perceptual capability of humans. At the same time, the application developers must understand the perceptual capabilities of the human sensory system, and convey the right amount of modality stimulations, integrate and synchronize them, and deliver them to …

Methods of displaying and evaluating of a motion data in a motion game apparatus are disclosed. According to the present invention, the motion of a game player following the motion of a dancer can be tracked and evaluated in real time. To induce the correct motion out of the player, in addition to Simply showing the animated dancing (or any other motion) character, a display method called the" sliding ghost'meta phor is proposed. Sliding ghosts refers to consecutive freeze frames of the motion data representing key postures of the motion. Also, for enhanced Viewing of the motion data, the player can Set the View point and key postures may be augmented, with Short texts/audio display to further inform the player of the next/current dance (motion) segment to perform. The motion of the player is captured by tracking five specific positions of the player's body. The five body positions are tracked by having the player …

Although life continues to become increasingly embedded with interactive computing services that make our lives easier, human-computer interaction (HCI) has not been given the attention it deserves in the education of software developers at the undergraduate level. Most entry-level HCI textbooks are structured around high-level concepts and are not directly tied to the software development process. Filling this need, Human-Computer Interaction: Fundamentals and Practice supplies an accessible introduction to the entire cycle of HCI design and implementation-explaining the core HCI concepts behind each step. Designed around the overall development cycle for an interactive software product, it starts off by covering the fundamentals behind HCI. The text then quickly goes into the application of this knowledge. It covers the forming of HCI requirements, modeling the interaction process, designing the interface, implementing the resulting design, and evaluating the implemented product. Although this textbook is suitable for undergraduate students of computer science and information technology, it is accessible enough to be understood by those with minimal programming knowledge. Supplying readers with a firm foundation in the main HCI principles, the book provides a working knowledge of HCI-oriented software development. The core content of this book is based on the introductory HCI course (advanced junior or senior-level undergraduate) that the author has been teaching at Korea University for the past eight years. The book includes access to PowerPoint lecture slides as well as source code for the example applications used …

We address the problem of teleoperating a mobile robot using shared autonomy: an on-board controller performs obstacle avoidance while the operator uses the manipulandum of a haptic probe to designate the desired speed and rate of turn. Sensors on the robot are used to measure obstacle range information. We describe a strategy to convert such range information into forces, which are reflected to the operator's hand, via the haptic probe. This haptic information provides feedback to the operator in addition to imagery from a front-facing camera mounted on the mobile robot. Extensive experiments with a user population show that the added haptic feedback significantly improves operator performance in several ways (reduced collisions, increased minimum distance between the robot and obstacles) without a significant increase in navigation time.

This paper proposes a scalable Augmented Reality (AR) framework enabled by a simple extension to the Internet of Things (IoT) infrastructure, called the "ARIoT." Through ARIoT (1) potential user-proximal target objects are dynamically identified in any IoT-enabled space, (2) tracking feature information is directly obtained from the IoT objects enabling fast recognition and tracking (independent of the number of the total IoT objects everywhere), and (3) generic interactive contents are augmented as an IoT service to the AR client. To further improve the AR tracking performance, which often depends on feature appearances, this paper introduces a method in which the preferred tracking method is determined by the very IoT object in hand. The proposed concept of ARIoT is demonstrated, and its performance is evaluated and compared with the conventional single serveror client-based AR implementation. In addition …

One of the goals in the design of virtual environments (VE) is to give the user the feeling of existence within the VE, known as presence. Employing multimodality is one way to increase presence, and as such, numerous multimodal input and output devices have been used in the context of virtual reality (VR). However, the simulation and investigation into the effects of the wind (or air flow) has not been treated much in the VR research community. In this paper, we introduce a wind display system, called the "WindCube," designed for virtual reality applications. The WindCube consists of a number of small fans attached to a cubical structure in which a VR system user interacts with the VE. We first discuss the design parameters of the proposed display device such as the type of the fan used, and the appropriate number, locations and directions of the fans in relation to providing the minimum level of the wind effects and …

Users experience and verify immersive content firsthand while creating it within the same virtual environment.

Traditional Tangible Augmented Reality (Tangible AR) interfaces combine a mixture of tangible user interface and augmented reality technology, complementing each other for novel interaction methods and real world anchored visualization. However, well known conventional one and two dimensional interaction methods such as pressing buttons, changing slider values, or menu selections are often quite difficult to apply to Tangible AR interfaces. In this paper we suggest a new approach, occlusion based interaction, in which visual occlusion of physical markers are used to provide intuitive two dimensional interaction in Tangible AR environments. We describe how to implement occlusion based interfaces for Tangible AR environments, give several examples of applications and describe results from informal user studies.

Hand-held computing devices are ubiquitous and have become part of our lives these days. Moreover, hand-held devices are also increasingly being equipped with special sensors and non-traditional displays. As such, it raises the question of whether such a "small" and "reduced" device could serve as an effective virtual reality (VR) platform and provide sufficient immersion and presence, e.g. through multimodal interaction. In this paper, we address this question by comparing the perceived field of view (FOV) and level of immersion and presence among the users' of VR platforms, varied in the sizes of physical/software FOV and in styles of interaction. In particular, we consider a motion based interaction, a style of interaction uniquely suitable for the "hand-held" devices. Our experimental study has revealed that when a motion based interaction was used, the FOV perceived by the user for the small hand held …

In this paper we report on an investigation of the effects of a self-avatar's visual similarity to a user's actual appearance, on their perceptions of the avatar in an immersive virtual reality (IVR) experience. We conducted a user study to examine the participant's sense of body ownership, presence and visual realism under three levels of avatar-owner visual similarity: (L1) an avatar reconstructed from real imagery of the participant's appearance, (L2) a cartoon-like virtual avatar created by a 3D artist for each participant, where the avatar shoes and clothing mimic that of the participant, but using a low-fidelity model, and (L3) a cartoon-like virtual avatar with a pre-defined appearance for the shoes and clothing. Surprisingly, the results indicate that the participants generally exhibited the highest sense of body ownership and presence when inhabiting the cartoon-like virtual avatar mimicking the outft of the participant (L2 …

This article presents a real-time GPU-based post-filtering method for rendering acceptable depth-of-field effects suited for virtual reality. Blurring is achieved by nonlinearly interpolating mipmap images generated from a pinhole image. Major artifacts common in the post-filtering techniques such as bilinear magnification artifact, intensity leakage, and blurring discontinuity are practically eliminated via magnification with a circular filter, anisotropic mipmapping, and smoothing of blurring degrees. The whole framework is accelerated using GPU programs for constant and scalable real-time performance required for virtual reality. We also compare our method to recent GPU-based methods in terms of image quality and rendering performance.

Accompanying the advent of wireless networking and the Internet of Things (IoT), traditional augmented reality (AR) systems to visualize virtual 3D models of the real world are evolving into smart and interactive AR related to the context of things for physical objects. We propose the integration of AR and IoT in a complementary way, making AR scalable to cover objects everywhere with an acceptable level of performance and interacting with IoT in a more intuitive manner. We identify three key components for realizing such a synergistic integration: (1) distributed and object-centric data management (including for AR services); (2) IoT object-guided tracking; (3) seamless interaction and content interoperability. We survey the current state of these respective areas and herein discuss research on issues about realizing a future smart and interactive living environment.

Traditionally, the main goal of teleoperation has been to successfully achieve a given task as if performing the task in local space. An emerging and related requirement is to also match the subjective sensation or the user experience of the remote environment, while maintaining reasonable task performance. This concept is often called “presence” or “(experiential) telepresence,” which is informally defined as “the sense of being in a mediated environment.” In this paper, haptic feedback is considered as an important element for providing improved presence and reasonable task performance in remote navigation. An approach for using haptic information to “experientially” teleoperate a mobile robot is described. Haptic feedback is computed from the range information obtained by a sonar array attached to the robot, and delivered to a user's hand via a haptic probe. This haptic feedback is provided to the user, in …

The problem of teleoperating a mobile robot using shared autonomy is addressed: An onboard controller performs close-range obstacle avoidance while the operator uses the manipulandum of a haptic probe to designate the desired speed and rate of turn. Sensors on the robot are used to measure obstacle-range information. A strategy to convert such range information into forces is described, which are reflected to the operator's hand via the haptic probe. This haptic information provides feedback to the operator in addition to imagery from a front-facing camera mounted on the mobile robot. Extensive experiments with a user population both in virtual and in real environments show that this added haptic feedback significantly improves operator performance, as well as presence, in several ways (reduced collisions, increased minimum distance between the robot and obstacles, etc.) without a significant increase in …

The current bare Internet of Things (IoT) infrastructure has recently been extended to include smarter and more effective user interactions. Individual or meaningful sets and groups of IoT objects can be imbued with data and/or content in a distributed manner and efficiently utilized by the client. This distribution makes it possible to scale and customize interaction techniques such as augmented reality (AR). This paper proposes an architecture for combining the AR interface with IoT for an improved shopping experience. The proposed architecture is distributed and therefore scalable such that any IoT product can be accessed on the spot locally without any server restriction and provide intuitive AR-based visualization and interaction for a flexible product trial in the showroom. We identify three key architectural components required to support such a seamless and scalable AR service and experience for IoT-ready …

Various techniques for object selection in virtual environments have been proposed over the years. Among them, the virtual pointer or ray-casting is one of the most popular method for object selection because it is easy and intuitive to use and allows the user to select objects that are far away. Variants of the virtual pointer metaphor include the Aperture, Flashlight, and Image plane method as categorized as such. In a monoscopic environment, these methods are essentially 2D interaction techniques, as the selection is made effectively on the image plane. Such a 2D based selection (or more generally, interaction) method has an added advantage in that it can find many good uses in 3D environments ranging from a simple 2D oriented subtask (object selection on a constrained surface, menu selection) to a situation where a whole 2D application (e.g. sketching tool, desktop manager) is embedded in the 3D …

DXP LAB

교수님 소개

제라드 김종현

연구실 소개

연구실 키워드

알럼나이가 간 회사

연구실 지원 방법

대우 조건

연도별 논문 인용수

저널 & 학회 논문 출판 수

연구실 논문 목록

JourneyVR: Experience Design for Continuous Timed Activities in Virtual Reality

Mitigating Cyber and Motion Sickness with Haptic and Visual Feedback for VR Users in Autonomous Vehicle

The Impact of Observer Presence on Trainees' Mental States and Performance in Remote Military Training with Virtual Humans in Mixed Reality Environment

연구실 보유 특허

대학별 입시끈

우리 연구실 모집

교수님 소개

제라드 김종현

연구실 키워드

알럼나이가 간 회사

연구실 지원 방법

대우 조건

연도별 논문 인용수

저널 & 학회 논문 출판 수

연구실 논문 목록

JourneyVR: Experience Design for Continuous Timed Activities in Virtual Reality

Mitigating Cyber and Motion Sickness with Haptic and Visual Feedback for VR Users in Autonomous Vehicle

The Impact of Observer Presence on Trainees' Mental States and Performance in Remote Military Training with Virtual Humans in Mixed Reality Environment

연구실 보유 특허

최근 3년간 연구실적 높은 연구실

대학별 입시끈

우리 연구실 모집