Woontack Woo

Woontack Woo
Korea Advanced Institute of Science and Technology | KAIST · Graduate School of Culture Technology (GSCT)

Ph.D.

About

363
Publications
59,740
Reads
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4,019
Citations
Introduction
Woontack Woo is a Professor in the Graduate School of Culture Technology (GSCT) at Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea. He also has been the Vice President of the Korean Institute of Next Generation Computing (since 2011), Vice Chair of the CG&I Society in the Korean Institute of Information Scientists and Engineers (since 2010), Vice President of the HCI Society of Korea (since 2008) and Vice President of the Korea Computer Graphics Society (since 2008). He received his BS in Electronics Engineering from Kyungpook National University (KNU, Daegu, Korea) in 1989 and his MS in Electronics and Electrical Engineering from Pohang University of Science and Technology (POSTECH, Pohang, Korea) in 1991. In 1998, he received his Ph.D. in Electrical Engineering-Systems from University of Southern California (USC), Los Angeles, CA, USA. In 1999, as an invited Researcher, he joined Advanced Telecommunications Research (ATR), Kyoto, Japan. From Feb. 2001 to Feb. 2012, he served as a Professor in the School of Information and Communications (SIC) and Director of Culture Technology Institute (CTI) at Gwangju Institute of Science and Technology (GIST), Gwangju, Korea. The main thrust of his research has been implementing ubiquitous virtual reality in smart space, which includes Context-aware Augmented Reality, 3D Vision, HCI, and Culture Technology. He coined the terminology, "ubiquitous virtual reality (UVR)" and initiated UVR Lab at GIST in 2001. Since then he has developed various augmented reality applications such as "DigiLog Books, DigiLog Miniatures and DogiLog Spaces" and published more than 400 papers in major journals and conferences.
Additional affiliations
February 2012 - present
Korea Advanced Institute of Science and Technology
Position
  • Professor
February 2012 - present
Korea Advanced Institute of Science and Technology
Position
  • Professor (Full)
February 2001 - February 2012
Gwangju Institute of Science and Technology
Position
  • Professor
Education
September 1993 - December 1998
University of Southern California
Field of study
  • EE-Systems
August 1989 - August 1991
March 1985 - February 1989
Kyungpook National University
Field of study
  • EE-Systems

Publications

Publications (363)
Article
Full-text available
Augmented reality (AR) head-mounted displays (HMDs) allow users to easily receive notifications while participating other tasks by projecting information directly in their field of view. Although HMDs offer such benefits in displaying notifications, there is insufficient research on the effective placement of AR notifications when the user is walki...
Article
A critical yet unresolved challenge in designing space-adaptive narratives for Augmented Reality (AR) is to provide consistently immersive user experiences anywhere, regardless of physical features specific to a space. For this, we present a comprehensive analysis on a series of user studies investigating how the size, density, and layout of real i...
Preprint
Full-text available
In this study, we explore how spatial configurations can be reflected in determining the threshold range of Relative Translation Gains (RTGs), a translation gain-based Redirected Walking (RDW) technique that scales the user's movement in Virtual Reality (VR) in different ratios for width and depth. While previous works have shown that various cogni...
Article
Full-text available
We present NapWell, a Sleep Assistant using virtual reality (VR) to decrease sleep onset latency by providing a realistic imagery distraction prior to sleep onset. Our proposed prototype was built using commercial hardware and with relatively low cost, making it replicable for future works as well as paving the way for more low cost EOG-VR devices...
Preprint
Full-text available
This paper investigates how the size of virtual space and objects within it affect the threshold range of relative translation gains, a Redirected Walking (RDW) technique that scales the user's movement in virtual space in different ratios for the width and depth. While previous studies assert that a virtual room's size affects relative translation...
Article
Full-text available
There have been attempts to provide new cinematic experiences by connecting TV or movie content to suitable locations through augmented reality (AR). However, few studies have suggested a method to manage breakdowns in continuity due to spatial transitions. Thus, we propose a method to manage the spatial transition that occurs when we create a TV s...
Article
Despite prior efforts to solve urban problems and build smart cities using large-scale urban information, researchers have yet to develop tools for city administrators to easily access a diverse mix of city information. To address this limitation, this article proposes an augmented reality visualization system, GeoACT, which can develop a digital t...
Article
This paper proposes a novel panoramic texture mapping-based rendering system for real-time, photorealistic reproduction of large-scale urban scenes at a street level. Various image-based rendering (IBR) methods have recently been employed to synthesize high-quality novel views, although they require an excessive number of adjacent input images or d...
Conference Paper
This study investigates the effects of a virtual hand representation on the user experience including social presence during hand-based 3D remote collaboration. Although a remote hand appearance is a critical parts of a hand-based telepresence, it has been rarely studied in comparison to studies on the self-embodiment of virtual hands in a 3D envir...
Conference Paper
This paper reports that the time-domain accuracy of bare-hand interactions in HMD-based Augmented Reality can be improved by using finger contact: touching a finger with another or tapping one's own hand. The activation of input can be precisely defined by the moment of finger contact, allowing the user to perform the input precisely at the desired...
Article
Full-text available
We present a sensor-fusion method that exploits a depth camera and a gyroscope to track the articulation of a hand in the presence of excessive motion blur. In case of slow and smooth hand motions, the existing methods estimate the hand pose fairly accurately and robustly, despite challenges due to the high dimensionality of the problem, self-occlu...
Article
In mixed reality (MR), augmenting virtual objects consistently with real-world illumination is one of the key factors that provide a realistic and immersive user experience. For this purpose, we propose a novel deep learning-based method to estimate high dynamic range (HDR) illumination from a single RGB image of a reference object. To obtain illum...
Article
Full-text available
This paper presents a flux weakening algorithm for synchronous reluctance motors (SynRMs) based on parameters estimated at standstill. Recently, flux saturated motors have been studied. Flux saturation models were identified and look-up tables were generated based on the saturation model for maximum torque per ampere (MTPA) and flux weakening opera...
Conference Paper
One of the main challenges in creating narrative-driven Augmented Reality (AR) content for Head Mounted Displays (HMDs) is to make them equally accessible and enjoyable in different types of indoor environments. However, little has been studied in regards to whether such content can indeed provide similar, if not the same, levels of experience acro...
Conference Paper
To better explore the incorporation of pointing and gesturing into ubiquitous computing, we introduce WRIST, an interaction and sensing technique that leverages the dexterity of human wrist motion. WRIST employs a sensor fusion approach which combines inertial measurement unit (IMU) data from a smartwatch and a smart ring. The relative orientation...
Conference Paper
SelfSync enables rapid, robust initiation of a gesture interface using synchronized movement of different body parts. SelfSync is the gestural equivalent of a hotword such as OK-Google in a speech interface and is enabled by the increasing trend where a user wears two or more wearables, such as a smartwatch, wireless earbuds, or a smartphone. In a...
Conference Paper
Many researchers have studied various visual communication cues (e.g. pointer, sketching, and hand gesture) in Mixed Reality remote collaboration systems for real-world tasks. However, the effect of combining them has not been so well explored. We studied the effect of these cues in four combinations: hand only, hand + pointer, hand + sketch, and h...
Conference Paper
This paper investigates the effect of avatar appearance on Social Presence and users’ perception in an Augmented Reality (AR) telepresence system. Despite the development of various commercial 3D telepresence systems, there has been little evaluation and discussions about the appearance of the collaborator’s avatars. We conducted two user studies c...
Conference Paper
We propose the system that provides an immersive experience by automatically extending the video content of the TV to the wall. Though it is possible to manually create the appropriate content that works on the existing TV screen, the cost is too expensive to create. The proposed deep neural network uses the center of the video as input and the out...
Conference Paper
Will Augmented Reality (AR) allow us to access digital information, experience others' stories, and thus explore alternate realities? AR has recently attracted attention again due to the rapid advances in related multimedia technologies as well as various glass-type AR display devices. However, in order to widely adopt AR in alternated realities, i...
Conference Paper
Augmented collaboration in a shared house design scenario has been studied widely with various approaches. However, those studies did not consider human perception. Our goal is to lower the user's perceptual load for augmented collaboration in shared space design scenarios. Applying attention theories, we implemented shared head gaze, shared select...
Conference Paper
Full-text available
We propose a novel method for model-based 3D tracking of hand articulations that is effective even for fastmoving hand postures in depth images. A large number of augmented reality (AR) and virtual reality (VR) studies have used model-based approaches for estimating hand postures and tracking movements. However, these approaches exhibit limitations...
Conference Paper
In this demonstration, we will show a prototype system with sensor fusion approach to robustly track 6 degrees of freedom of hand movement and support intuitive hand gesture interaction and 3D object manipulation for Mixed Reality head-mounted displays. Robust tracking of hand and finger with egocentric camera remains a challenging problem, especia...
Conference Paper
Full-text available
Conventional approaches to a virtual heritage site that provide interpretations through curated content allow visitors only the lowest level of engagement, which is paying conscious, intentional attention to the content. In this paper, we propose a trajectory for visitor experience to a virtual heritage site that facilitates a higher level of engag...
Chapter
In applying MR (AR/VR) technologies to cultural heritage sites, the design and implementation of mobile MR applications have mostly lacked a holistic and systematic approach in the viewpoint of retrieving existing content and providing personalized experiences to visitors on the fly. To address this issue, we designed and implemented the KCTM appli...
Conference Paper
In "Itchy Nose" we proposed a sensing technique for detecting finger movements on the nose for supporting subtle and discreet interaction. It uses the electrooculography sensors embedded in the frame of a pair of eyeglasses for data gathering and uses machine-learning technique to classify different gestures. Here we further propose an automated tr...
Article
Full-text available
Augmented reality (AR) has received much attention in the cultural heritage domain as an interactive medium for requesting and accessing information regarding heritage sites. In this study, we developed a mobile AR system based on Semantic Web technology to provide contextual information about cultural heritage sites. Most location-based AR systems...
Conference Paper
Full-text available
We propose a sensing technique for detecting finger movements on the nose, using EOG sensors embedded in the frame of a pair of eyeglasses. Eyeglasses wearers can use their fingers to exert different types of movement on the nose, such as flicking, pushing or rubbing. These subtle gestures can be used to control a wearable computer without calling...
Conference Paper
This paper proposes a method to effectively utilize multimedia databases created and indexed by a metadata schema designed specifically for AR applications used at cultural heritage sites. We attempt to do so by incorporating storytelling principles that employ video data for the purpose of providing useful and meaningful guidance at Changdeokgung...
Conference Paper
AR technology has been rapidly accepted in the cultural heritage domain, which requires wide context information for complete understanding as providing an enhanced experience to the user with related information of the physical world. However, currently, there are several limitations for seamless AR such as applications in outdoor environments and...
Conference Paper
This paper presents an augmented reality (AR) authoring system that enables an ordinary user to easily build an AR environment by manipulating and placing 3D virtual objects. The system tracks users’ hand motions via an RGB-D camera which built-in an optical see-through (OST) head mounted display (HMD), and interactive features applied to virtual o...
Conference Paper
Full-text available
As mobile gaming has become increasingly popular in recent years, new forms of mobile game social media such as GameDuck that share mobile gameplay videos have emerged. In this work, we set out to understand the user motives of GameDuck by leveraging the Uses and Gratification Theory. We first explore the major motive themes from users' responses (...
Conference Paper
Full-text available
TiTAN is a spatial user interface that enables freehand, midair text entry with a distant display while only requiring a low-cost depth sensor. Our system aims to leverage one's familiarity with the QWERTY layout. It allows users to input text, in midair, by mimicking the typing action they typically perform on a physical keyboard or touchscreen. H...
Conference Paper
Technical capabilities increase steadily while human evolution is slow. Technical sensors improve while human senses remain largely the same. Many tasks are becoming much easier when our perception is augmented with additional information. In this workshop, we want to bring researchers together that are working on the augmentation and amplification...
Conference Paper
Rediscovering Daereungwon is a location-based Augmented Reality(AR) mobile game application that aims to enrich the experience of navigating Daereungwon, a Korean cultural heritage site consisting of various royal tombs from the Silla dynasty. In this paper, a framework binding 3 main PoIs with distinctive features into a successive, cohesive, and...
Conference Paper
There have been a number of researches to provide new media experience through augmented reality technology. However, most of them focus on creating new virtual content rather than remediating existing content such as films and TV programs. In this paper, we design a metadata schema and use cases to provide location-based film experience based on t...
Article
Possibilistic c-means (PCM) was proposed to overcome the problem of the noise sensitivity of fuzzy c-means, but its performance highly depends on the initialisation of cluster centres and often is degraded due to producing coincident clusters or close centres. To tackle these defects of PCM, a divide-conquer method which not only provides appropria...
Conference Paper
As the advancement of mixed and augmented reality technologies accelerates, not only the matured, complete studies but also early results of innovative ideas and unique experiences of case studies are getting more important to the research community. Examples of such studies include those with innovative concepts, hardware, software or applications...
Conference Paper
Full-text available
Orbits combines a visual display and an eye motion sensor to allow a user to select between options by tracking a cursor with the eyes as the cursor travels in a circular path around each option. Using an off-the-shelf Jins MEME pair of eyeglasses, we present a pilot study that suggests that the eye movement required for Orbits can be sensed using...
Article
In this paper, we propose TunnelSlice, which enables natural acquisition of subspace in an augmented scene from an egocentric view, even for scenarios involving ambiguous center objects or object occlusion. In wearable augmented reality (AR), approaching a three-dimensional (3-D) region including the objects of interest has become more important th...
Article
We present a novel natural user interface framework, called Meta-Gesture, for selecting and manipulating rotatable virtual reality (VR) objects in egocentric viewpoint. Meta-Gesture uses the gestures of holding and manipulating the tools of daily use. Specifically, the holding gesture is used to summon a virtual object into the palm, and the manipu...
Conference Paper
Solar System implements smooth pursuit eye movement interactions on commercial smart glasses using electrooculography. The system requires no calibration and little to no training. We present a prototype implementation, describe initial user tests and show several application scenarios for hands-free eye gaze interactions.
Conference Paper
Full-text available
In this paper, we introduce the K-Culture Time Machine Project, which develops a mobile AR platform for visualizing time-space connected cultural contents of Korea. Existing AR Applications in cultural heritage domains are currently not interoperable and cannot reuse content. To solve this problem, we developed the modified AR reference model as ge...
Conference Paper
Full-text available
The Augmented Reality applications have received great attention in the recent years. However, there is still a lack of formal description of such systems currently. In this paper, we propose a new formal model for context-aware semantic Augmented Reality systems. The model can be divided into two parts: a set-theory function based method allows th...