Byounghyun Yoo

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• PhD
• Center Head at Korea Institute of Science and Technology

This study presents a pilot investigation into a novel method for reconstructing real-time ground motion during small magnitude earthquakes (M < 4.5), removing the need for computationally expensive source characterization and simulation processes to assess ground shaking. Small magnitude earthquakes, which occur frequently and can be modeled as po...

Dysphagia, a disorder affecting the ability to swallow, has a high prevalence among the older adults and can lead to serious health complications. Therefore, early detection of dysphagia is important. This study evaluated the effectiveness of a newly developed deep learning model that analyzes syllable-segmented data for diagnosing dysphagia, an as...

We introduce a novel data reconstruction algorithm known as Gappy auto-encoder (Gappy AE) to address the limitations associated with Gappy proper orthogonal decomposition (Gappy POD), a widely used method for data reconstruction when dealing with sparse measurements or missing data. Gappy POD has inherent constraints in accurately representing solu...

When using Virtual Reality (VR) and Augmented Reality (AR) to support remote collaboration, effective communication between a remote expert in VR and a local worker in AR is important for guiding and following task instructions. This is especially crucial for assembly tasks, which require precise identification of parts and clear directions for the...

Recent advancements in three-dimensional (3D) scanning technology have broadened its applicability across fields like reverse engineering and autonomous robot navigation, which require a 3D representation of real-world objects. A key aspect of this digitalization process is autonomous view planning. This paper comprehensively reviews autonomous vie...

Previous studies have investigated which context-sharing interfaces are effective in improving task performance; however, consistent results have yet to be found. In this study, we developed a convenient remote collaboration system that provides multiple context-sharing interfaces in a single platform (2D video, 360 video, and 3D reconstruction vie...

Unlabelled: Virtual reality (VR) experiences can cause a range of negative symptoms such as nausea, disorientation, and oculomotor discomfort, which is collectively called cybersickness. Previous studies have attempted to develop a reliable measure for detecting cybersickness instead of using questionnaires, and electroencephalogram (EEG) has been...

For an XR environment to be used on a real-life task, it is crucial all the contents are created and delivered when we want, where we want, and most importantly, on time. To deliver an XR environment faster and correctly, the time spent on modeling should be considerably reduced or eliminated. In this paper, we propose a hybrid method that fuses th...

Due to COVID-19, people have to adapt to the new lifestyle until scientists develop a permanent solution for this pandemic. Monitoring the respiration rate is very important for a COVID-infected person because the Coronavirus infects the pulmonary system of the person. Two problems that arise while monitoring the breath rate are: sensors are contac...

Many studies have consistently proven that repeatedly watching virtual reality (VR) content can reduce cybersickness. Moreover, the discomfort level decreases when the VR content includes an unusual orientation, such as an inverted scene. However, few studies have investigated the physiological changes during these experiences. The present study ai...

The Internet of Things (IoT) landscape is synergistic with various participating domains like smart healthcare, Industrial IoT, and smart cities. The Consumer Internet of Things (CIoT) landscape with its massive potential occupies a sizable chunk of the future internet and is still immature due to its lack of interoperability and data sustainabilit...

Herein, we present an efficient method for the high-precision automatic 3D scanning of unknown objects for mechanical parts. Our method comprises two phases, namely a rough initial scan and a precision scan. The goal of the rough initial scan is to scan the rough shape rapidly and to provide scan data for the precision scan, thereby reducing the du...

Cybersickness refers to a group of uncomfortable symptoms experienced in virtual reality (VR). Among several theories of cybersickness, the subjective vertical mismatch (SVM) theory focuses on an individual's internal model, which is created and updated through past experiences. Although previous studies have attempted to provide experimental evide...

Collaborating in a physically remote location saves time and money. Many remote collaboration systems have been studied and commercialized. Their capabilities have been confined to virtual objects and information. More recent studies have focused on collaborating in a physical environment and with physical objects. However, they have limitations in...

Virtual Reality (VR) and Augmented Reality (AR) have become familiar technologies with related markets growing rapidly every year. Moreover, the idea of considering VR and AR as one eXtended reality (XR) has broken the border between virtual space and real space. However, there is no formal way to create such XR content except through existing VR o...

Recent progress in Device-Free Wi-Fi Sensing (DFWS) has established the use of wireless signals like Wi-Fi not only to communicate but also as a tool to enable device-free sensing. As an emerging technique, DFWS has many capable applications such as sensing activity and gesture and fall detection, monitoring elderly, surveillance, and many more app...

In a rapidly aging society, like in South Korea, the number of Alzheimer's Disease (AD) patients is a significant public health problem, and the need for specialized healthcare centers is in high demand. Healthcare providers generally rely on caregivers (CG) for elderly persons with AD to monitor and help them in their daily activities. K-Log Centr...

In this article, we present an automatic pose generation approach for robotic 3-D scanning systems designed for the reverse engineering of mechanical parts. 3-D scanning of an object is usually a highly complicated process that involves aligning multiple measurements from different viewpoints, fusing the merged data, and finally reconstructing the...

In virtual reality (VR), users can experience symptoms of motion sickness, which is referred to as VR sickness or cybersickness. The symptoms include but are not limited to eye fatigue, disorientation, and nausea, which can impair the VR experience of users. Though many studies have attempted to reduce the discomfort, they produced conflicting resu...

Since the vision of a Digital Earth (DE) was introduced in 1998, geo-browsers seem to have nearly fulfilled this vision. Virtual reality (VR) for visualizing the DE provides an immersive user experience in a mirror world. Location-based augmented reality (AR) browsers have been introduced and provide content according to user and environmental cont...

The web has been an extremely effective collaboration platform, enabling services like Wikipedia article co-authoring, blogging, social messaging, video conferencing, and many others. However, the collaboration should ideally occur Peer to Peer (P2P) among the participants instead of going through a centralized server as in the current centralized...

Recently, web based cross reality (XR) concept embracing virtual reality (VR), augmented reality (AR), and mixed reality (MR) technology has emerged, but user interaction devices for collaborative work supported in web environments are limited. The Virtual-Reality Peripheral Network (VRPN) in the traditional VR environment provides a device-indepen...

In virtual reality (VR), users can experience symptoms of motion sickness, which is referred to as VR sickness or cybersickness. The symptoms include but are not limited to eye fatigue, disorientation, and nausea, which can impair the VR experience of users. Though many studies have attempted to reduce the discomfort, they produced conflicting resu...

Despite the proliferation of wearable devices and mobile apps for healthcare activity monitoring, no model that complementarily integrates these monitoring logs making up personal big data has been put forth. In addition, such datasets are too large to yield meaningful information. To deal with data from heterogeneous sources, a common format and i...

A glasses-free super multi-view display has emerged alongside the development of optical technologies. However, the display is not yet widely used because its content remains in the early stages of only image or video without user interaction. Expanding the display market would require content that can take advantage of the display. In this paper,...

The virtual reality (VR)-based interior design systems have the advantage of cost reductions and can support multiple users without spatial or temporal constraints. Recently, various head-mounted display (HMD) applications for VR using smartphones have become popular, and WebVR technology has been introduced to implement VR applications on the web....

Smart glass devices have become popular in our daily lives, and many people have applied its advantages to their application fields. In particular, smart glass has the advantage of receiving desired information by maintaining their context of the real world without dispersing their attention. Smart glass is also widely used to obtain information ab...

Various types of video content using 360° panoramic and virtual reality video have become widespread. However, wearing eyewear as well as a head-mounted display is still a burden of experiencing in 3D content. Glasses-free (i.e. autostereoscopic) super multi-view (SMV) 3D displays provide more comfortable 3D experience but have limited types of con...

Although internet of things (IoTs) devices are attractive for making our life smarter, we need to replace existing equipment with IoT devices to connect, and this presents a cost problem. We propose a webized augmented reality mashup for legacy things that connects existing web services with things without the additional costs of replacing existing...

Recently virtual reality (VR) technology has been widely distributed, but VR interaction devices supported in web environments are limited compared with in the traditional VR environment. In the traditional VR environment, the Virtual-Reality Peripheral Network (VRPN) provides a device-independent and network-transparent interface. To promote the d...

The emergence of cloud computing environment has a big impact on the change of application usage pattern. People use applications without installation on their computer. In cloud computing environment, applications are available through web browsers regardless of the user's computing environment. The users use the latest version of applications bec...

With the development of optic technologies, various forms of stereoscopic 3D displays such, as 3DTVs, head-mounted displays, multi-view autostereoscopic displays, and super multi-view autostereoscopic displays, have emerged. However, displays have various characteristics and different implementations and the supply of content and rendering applicat...

The proportion of elderly people over 65 years old has rapidly increased, and social costs related to aging population problems have grown globally. The governments want to reduce these social costs through advanced technologies. The physician or medical center evaluates health conditions from the reports of elderly people. However, self-reports ar...

Mobile navigations help people to find route faster and easier. However, current pedestrian navigations provide the same route information as the instructions of car navigation with little consideration for pedestrians. Mobile pedestrian navigations should consider pedestrian walkways and device capabilities. In this paper, we propose a landmark-ba...

With the popularization of wearable devices, people who are using multiple mobile devices are increasing; a tourist uses a hand-held device, a wearable device, or both to obtain tour information. However, most mobile tour guides provide tour information with little consideration of their hand-held and wearable characteristics. In addition, tour gui...

[Purpose] This paper examines the changing backdrop of the consumer market in relation to 3D printing, especially in the context of Web infrastructure that connects consumers and producers with unprecedented diversity and scale, and Web 2.0 user created content in the material domain. [Design/methodology/approach] The paper presents a conceptual a...

Mobile tour guide applications help tourists to search for and visit their surrounding POIs(Points of Interest) of their locations and to obtain their guide information. With the development of wearable devices like smart watches and wearable glasses, people using multiple mobile devices are increasing; a tourist may use a hand-held device, a weara...

Most mixed and augmented reality (MAR) applications require the target to be specified a priori and need the same MAR applications among cooperative users. Thus, most existing MAR applications are hard to share MAR scenes or contents without prior agreement for cooperative works. To address this problem, we propose a webizing method that redesigns...

This chapter investigates how the visualization of sensor resources on a 3D Web-based globe organized by level-of-detail can enhance search and exploration of information by easing the formulation of geospatial queries against the metadata of sensor systems. The case study provides an approach inspired by geographical mashups in which freely availa...

With the development of 3D Web technologies, 3D objects are now handled as embedded objects without plug-ins on web pages. Although declarative 3D objects are physically integrated into web pages, 3D objects and HTML elements are still separated from the perspective of the 3D layout context, and an annotation method is lacking. Thus it is scarcely...

With steady growth in the deployment of sensor networks and widespread usage of mobile devices, the production of geo-referenced data is increasing exponentially, while analysis of the data typically uses a variety of application services on the Internet for activities such as logging and driving. This geo-referenced content needs to be classified...

Notwithstanding a proliferation of wearable devices and mobile apps for activities monitoring, no model has been put forth to complementarily integrate the monitored data. We propose an enriched activity model to reorganize personal activity logs from heterogeneous sensors and to visualize logs in a harmonized way with a meaningful summary.

This paper presents a mobile application that helps tourists acquire information using three types of views—AR, map, and list view—each of which has different drawbacks and benefits. To deal with the disadvantages of each view, we propose a view-management component to change the layout depending on the context.

Measurement errors of kinematic signals introduced by motion capture systems are unacceptably amplified when differentiating the signal to derive acceleration. Existing fully automatic methods for solving this problem have a weakness on non-stationary signals involving impacts, while semi-automatic methods each require that users carefully determin...

It is easy to get lost while browsing and navigating spatiotemporal content, and the problem is exacerbated by the exponential growth of geospatial data with mobile phones and tablets. In this paper, we propose a continuous method of transition visualization with zooming and panning interaction of the maps and timelines on touch-based devices that...

Information presentation techniques are important in augmented reality applications as they are in the traditional desktop user interface (WIMP) and web user interface [6]. This paper introduces view management for a web-based augmented reality mobile platform. We use a webized mobile AR browser called Insight that provides separation of the applic...

This demonstration shows a novel approach for Webizing mobile augmented reality, which uses HTML as its content structure, and its real-life use cases. Insight is a mobile AR Web browser that executes HTML5-based AR applications. By extending physical objects and places with a uniform resource identifier (URI), we could build objects of interest fo...

The Monterey Bay Aquarium Research Institute designed the Spatial Temporal Oceanographic Query System (STOQS) to create new capabilities for scientists to gain insight from their data. STOQS employs open standards and is a 100% free and open source project. It includes a Web-based graphical user interface where X3D Geospatial has been integrated to...

This paper presents a content structure for building mobile augmented reality (AR) applications in HTML5 to achieve a clean separation of the mobile AR content and the application logic for scaling as on the Web. We propose that the content structure contains the physical world as well as virtual assets for mobile AR applications as document object...

There are several issues with Web-based search interfaces on a Sensor Web data infrastructure. It can be difficult to (1) find the proper keywords for the formulation of queries and (2) explore the information if the user does not have previous knowledge about the particular sensor systems providing the informa- tion. We investigate how the visuali...

To facilitate the dynamic exploration of the Sensor Web and to allow users seamlessly to focus on a particular sensor system from a set of registered sensor networks deployed across the globe, interactive 3D graphics on the Web, which enables sensor data exploration featuring a good level of detail for a multi-scaled Sensor Web, is necessary. A com...

Motion effects are the most important physical effects of commercial feature films in the latest cinemas equipped with multi-sensory-effect systems known as 4DX theaters. This paper presents a framework for automatically generating motion effects from a video. We propose a seven-step motion-effect production pipeline based on the concept of structu...

The depiction and navigation of large-scale urban landscapes are limited by the great cost of traditional computer-aided design (CAD) models for large urban environment in terms of both the labor of data entry and the runtime computational expense. This article presents a hybrid modeling approach that enables rapid urban model production from legac...

We investigate how the visualization of sensor resources on a 3D Web-based globe organized by level- of-detail can enhance search and exploration of information by easing the formulation of geospatial queries against the metadata of sensor systems. Our case study provides an approach inspired by geographical mashups in which freely-available functi...

본 발명은 시청자의 머리의 기울임과 위치에 따라 입체영상이 변화하는 기능을 구비하여 시청자세의 변화에 따라 능동적으로 반응하는 3차원 입체영상의 생성 시스템과 방법에 관한 것이다. 본 발명에 따른 3차원 입체영상 생성 시스템은 입력 영상의 종류에 따라 주 영상과 보조 영상을 획득하는 영상 획득부와 시청자의 시청방향과 시청위치에 관한 시청자세정보를 수집하는 시청자세 수집부, 획득한 영상으로부 터 시청자의 시청자세에 따라 3차원 입체영상을 생성하는 3차원 입체영상 생성부를 포함하는 것을 특징으로 한다.

This paper introduces a displacement mapping algorithm that represents protruded shapes on the surface of an object. Two verticalsurfaces that are perpendicular to the underlying surface are added along the boundary of the polygon surface in order to represent pixels overflowing acrossthe boundary of the polygon surface. The proposed approach can a...

本 発明は、コンピュータを用いて３次元の立体映像を生成する方法に関し、もっと詳しくは、単眼による２次元の平面イメージとＺバッファに貯蔵されたイメージ の距離情報とを用いて３次元の立体映像を生成する方法に関するものである。本発明によれば、実際にポリゴン面から突出した形状のシルエットを正確に表現す ることができる。従来のＧＰＵを利用した映像基盤の変位マッピング方法が基準面から陥没した形状しか表現できなかったのとは違い、本発明によれば、実際に ポリゴン面から突出した形状を表現するように変位マップを定義し、突出した形状のシルエットを表現することができる。また、ポリゴン面の形状を変形せず、 単に補助的な二つの面を付け加えることにより、全体モデルの頂点の数をほとんど増加させずに突出した形状の詳細を表現す...

There are several issues with Web-based search interfaces on a Sensor Web data infrastructure. It can be difficult to 1) find the proper keywords for the formulation of queries and 2) explore the information if the user does not have previous knowledge about the particular sensor systems providing the information. We investigate how the visualizati...

We introduce a web-service and its subsystems for scientific data exchange that is geographically referenced. This system has been designed for interdisciplinary research groups who conduct various scientific observations and generate their own scientific data in different environmental engineering area. These data include raw data from physical se...

The present invention relates, in general, to technology applied to entertainment information devices, such as video game machines or computer game programs, information devices for representing geo-spatial information, or information devices for performing three-dimensional rendering using computer graphics and, more particularly, to a protruded d...

Global interests for construction of 3 dimensional spatial information has risen due to development of measurement sensors and data processing technologies. In spite of criticism for the violation of personal privacy, CCTV cameras equipped in outdoor public space of urban area are used as a fundamental sensor for traffic management, crime preventio...

Broad needs for digital models of real environments such as 3D terrain or cyber cities are increasing. Many applications related to modeling and simulation require virtual environments constructed from real-world geospatial information in order to guarantee relevance and accuracy in the simulation. The most fundamental data for building virtual env...

Training war fighters how to maneuver a submarine is very important, but the use of real submarines in such training is expensive and hindered by regional and temporal limitations. Modeling and simulation (M&S) can be a good alternative to costly training. However, the use of existing M&S for submarines has limitations. For instance, the commercial...

Digital Earth is being re-evaluated and there are weakness and limitations in geobrowsers despite of its successful widespread adoption. Especially the interoperability of virtual globes, neutrality of digital earth model, and openness are tasks to be solved for putting forward the vision of the Digital Earth. This paper presents an open standard-b...

이 발명은 컨테이너 하우스 형태로 제작하여 설치현장으로 이송한 후 전원 공급만으로 간단하게 이용이 가능하며, 공간적인 제약이 없이 이동이 가능한 이동식 몰입형 가상환경제공 시스템에 관한 것이다. 이 발명은 이동이 가능한 공간에 멀티채널의 고해상도 몰입형 디스플레이 시스템과 공조 시스템을 겸비하여 몰입형 가상환 경을 제공할 수 있어, 설치 장소에 별도의 공사를 필요로 하지 않고, 간단히 운반하여 설치하는 것만으로 사용이 가능하다. 또한,공사현장등과같이가변적인환경또는자주변하는환경에빠르고다양하게적용할수있도 록 필요에 따라 이동식 몰입형 가상환경의 확장이 가능하며, 더 나아가 내부의 고해상도 몰입형 디스플레이 채널 수와 구성의...

The needs for digital models of real environment such as 3D terrain or cyber city model are increasing. Most of applications related with modeling and simulation require virtual environment constructed from geospatial information of real world in order to guarantee reliability and accuracy of the simulation. The most fundamental data for building v...

The needs for digital models of real environment such as 3D terrain or cyber city model are increasing. Most of applications related with modeling and simulation require virtual environment constructed from geospatial information of real world in order to guarantee reliability and accuracy of the simulation. The most fundamental data for building v...

본 발명은 비디오 게임기 및 컴퓨터 게임 같은 엔터테인먼트 정보기기, 지형 공간 정보를 표현하는 정보기기 또는 컴퓨터 그래픽을 이용한 3차원 렌더링을 수행하는 정보기기에 적용되는 기술로서, 대상물을 표면으로부터 돌출되도록 표현하는 돌출 변위 매핑 방법에 관한 것이다. 이 발명에 따른 돌출 변위 매핑 방법은, 변위정보에 의해 정의되는 돌출된 물체의 표면과 관찰자 시선과의 교점을 검색하 여 상기 돌출된 물체 형상을 상기 폴리곤 면에 표시하는 교점검색단계와; 상기 폴리곤 면을 추가하여 상기 폴리곤 면의 경 계를 벗어나는 초과분에 해당하는 상기 돌출된 물체 형상을 상기 추가 폴리곤 면에 표시하는 초과분표시단계와; 상기 돌출 된...

This paper describes a displacement mapping technique which represents protruded shapes on the surface of an object. Previous approaches for image-based displacement mapping can represent only shapes depressed from the polygon surface. The proposed technique can represent shapes protruded from the underlying surface in real-time. Two auxiliary surf...

A VR (virtual reality) simulator which is used for helicopter simulations requires a virtual environment of real world urban areas. However, real urban environments are continuously changing. It is necessary to develop a modeling method that makes direct use of GIS (geographical information system) data which is updated periodically. A flight simul...

This paper describes the real-time mapping displacement of buildings onto the polygon model of base terrain of geo-spatial information. The buildings are represented as height maps, leading to low memory requirements and not involving changes of the original geometry (i.e., no vertices are created or displaced). The displacement of buildings is map...

We present a technique to manage the silhouette of objects protruding from the surface without polygonal modeling of the object shape. The technique can represent the correct silhouette and the parallax of protruding shapes by solving the overflow problem that frequently occurs in image-based displacement mapping approaches.

Virtual reality simulators have been developed as tools for the transfer of knowledge and education. Concurrently, the demand for exhibition systems of science education and cultural experiences has also increased. Existing VR (virtual reality) simulators, which are based on the calculation of dynamics equations, cannot easily be adapted to changes...

가상현실 시뮬레이터는 교육과 지식의 전달을 위한 도구로 발전하고 있으며, 과학교육 및 문화체험을 위한 첨단과학전시시스템의 수요가 증가하고 있다. 동역학적 계산을 기반으 로 하는 기존의 가상현실 시뮬레이터는 컨텐츠의 변경이 어려운 단점이 있으며, 효과적인 지식전달 및 흥미 유발을 위해서는 운동감뿐만 아니라 다감각을 동원한 체감 시스템이 필 요하다. 본 연구에서는 체감형 전시 시스템에 적합한 운동감 생성 방법과, 다감각 동원 가상현실 효과 시스템을 설계하고 통합하였다. 제안된 방법은 영상의 시점변화를 기반으로 한 운동 감 생성과, 미리 저장된 모션 라이브러리를 이용한 운동감 효과를 동시에 적용할 수 있으 며, 관객의 상호작...

Virtual reality (VR) simulators have been extended to transfer knowledge and education, and demands for exhibition systems for science education and cultural experiences has also increased. Existing VR simulators, which are based on the dynamics equations of motion, cannot easily be adapted to changes in simulation contents. In order to effectively...

This paper describes a representation for the real-time mapping displacement of buildings onto the polygon model of base terrain in geo-spatial information. Geo-spatial information used for modeling the virtual environment of flight simulation is similar to the displace-ment map. The buildings are represented as height maps, leading to a technique...

가상현실 시뮬레이터는 교육과 지식의 전달을 위한 도구로 발전하고 있으며, 과학교육 및 문화체험을 위한 첨단과학전시시스템의 수요가 증가하고 있다. 동역학적 계산을 기반으 로 하는 기존의 가상현실 시뮬레이터는 컨텐츠의 변경이 어려운 단점이 있으며, 효과적인 지식전달 및 흥미 유발을 위해서는 운동감뿐만 아니라 다감각을 동원한 체감 시스템이 필 요하다. 본 연구에서는 체감형 전시 시스템에 적합한 운동감 생성 방법과, 다감각 동원 가상현실 효과 시스템을 설계하고 통합하였다. 제안된 방법은 영상의 시점변화를 기반으로 한 운동 감 생성과, 미리 저장된 모션 라이브러리를 이용한 운동감 효과를 동시에 적용할 수 있으 며, 관객의 상호작...

운동 시뮬레이션 기술에 있어 운동감의 생성은, 일반적으로 대상 오브젝트의 운동에 대한 동역학적 계산에 의해 이루어진다. 사실적 운동감 효과 생성을 위해 보다 정밀한 수치 계산이 필요하지만, 많은 비용이 요구되며 실시간 시 뮬레이션 기술의 적용에 어려움이 있다. 하지만 보다 현실적인 운동감 생성 을 위한 요구는 계속되고 있으며, 이를 극복할 수 있는 여러 방안이 연구되 고 있다. 이중 미리 생성된 다양한 모션 데이터(샘플)들을 서로 혼합하여, 실시간 운동감 효과를 재현하는 방법을 모션 합성(Motion Blending)이라 한 다. 미리 계산되거나 샘플링 된 모션 데이터를 기존 모션에 중첩 (Superposition)하면...

Interactive simulators that simulate mechanical systems are being developed for the purpose of performance evaluation of product design, replacement of physical training, and entertainment game. Use of flight simulator is increasing to reduce risk and cost of physical training, and we need virtual environment which covers large area terrain. We nee...

변위 매핑 (displacement mapping) 은 3 차원 모델 표면의 상세한 표현을 통하 여 실감을 높이기 위한 방법으로 사용된다. 비행 시뮬레이션과 같은 실외 환 경의 가시화에 필요한 지형모델의 실시간 가시화를 위하여, 변위 매핑을 사 용하여 지형 모델의 사실감을 높이고자 한다. 게임 등에 사용되는 가상의 자 연환경 지형이 아닌, 도시와 같은 실존하는 지형의 대부분을 차지하는 건물 의 표현을 위하여, 기존의 표현 방법을 분석하여 문제점을 제시하고 이를 해 결하기 위한 방안을 제안한다. 보다 사실감 있는 실제 도시 지형모델을 제공 하기 위하여, 건축물의 외형을 포함하는 지형가시화 방법을 제안하고, 실험을 통하여...

本発明は、コンピュータを用いて３次元の立体映像を生成する方法に関し、もっと詳しくは、単眼による２次元の平面イメージとＺバッファに貯蔵されたイメージの距離情報とを用いて３次元の立体映像を生成する方法に関するものである。３次元モデルを一般的な映像生成方法に適用して一つの２次元イメージだけを生成し、生成された２次元イメージ を計算式に適用して更に異なる一つの２次元イメージを生成した後、二個の２次元イメージなどを用いて立体映像を生成する。従って、既存の方法は一般映像を 生成するものと比較して二倍の計算量を必要とするが、本発明で提案している方法は簡単な計算式を通じて残りの一つのイメージを容易に、且つ、早く生成する ことができるので、コンピュータの性能が二倍に増強されなくとも立体映像を容易に、且つ、早く...

A method for generating a three-dimensional stereographic image on the basis of a two-dimensional planar image for one eye and depth information of the image stored in the Z-buffer. The first two-dimensional image for one eye of a viewer is created by rendering a three-dimensional model. Color information and depth information of the first two-dime...

본 발명은 컴퓨터를 이용하여 단안에 의한 2차원 평면 이미지와 Z버퍼에 저장된 이미지의 거리정보로부터 3차원 입체영상을 생성하는 방법에 관한 것이다. 이러한 입체영상 생성방법은, 3차원 모델을 렌더링하여 한쪽 눈에 대응하는 제 1 2차원 이미지를 생성하고, 상기 제 1 2차원 이미지의 색정보를 프레임버퍼에 저장하고 거리정보를 Z버퍼에 저장하는 제 1 단계와, 상기 제 1 2차원 이미지와 상기 프레임버퍼에 저장된 색정보 및 Z버퍼에 저장된 거리정보를 이용하여 다른 쪽 눈에 대응하는 제 2 2차원 이미지를 생성하는 제 2 단계, 및 상기 제 1 2차원 이미지와 제 2 2차원 이미지를 이용하여 입체영상을 생성하는 제 3 단계...

1 인용 경량 스포츠 헬리콥터의 시뮬레이터를 개발하였다. 사용자는 운동 판 위에 설치된 헬리콥터 목업에 탑승하여 HMD 상에 보여지는 그래픽 환경 내에서 실제 헬리콥터를 운전하듯 페달과 조향 장치를 조작하면서 현실적 운 동감을 느끼고, 시각, 운동감, 음향 효과의 생생한 재현을 경험하게 된다. 또 한, 현실과 혼합된 가상환경을 이용하여 사용자는 헬리콥터의 실제 모습과 가상환경을 동시에 보면서 운전할 수 있다. 개발된 헬리콥터 시뮬레이터는 다 자유도의 운동감 재현시스템, 조향 스틱과 페달 반력 장치, 시각 시뮬레이 터, 3 차원 음향시스템, 그리고 각 세부 시스템의 제어 모듈과 혼합가상환경 시스템으로 구성되어 있다. 본...

가상현실 비행 시뮬레이터에 사용하기 위한 실제 지형의 가상환경을 제작하 고, 이를 스포츠 헬리콥터 시뮬레이터에 적용하였다. 실제 지형모델을 사용하 기 위하여 국가지리정보시스템의 수치지도로부터 지형 모델을 만들고, 위성 사진을 적용하여 높은 고도에서도 사용자에게 실제와 같은 가상환경을 보여 주도록 하였다. 비행 시뮬레이터의 특성상 이착륙시와 같은 낮은 고도에서도 실제감을 높이기 위하여 한국과학기술원의 3 차원 모델을 지형모델과 함께 사용하였다. 또한 크로마키 기법을 이용한 혼합 가상 현실 시스템을 구축하 였다. 사용자는 블루 스크린에 투영된 가상환경만이 아니라 자신의 손과 발 을포함한조향장치를 HMD에부착된 CCD 카메라...

A flight simulator has different points to be considered compared to a driving simulator, because the operator can be located at any position of the virtual world. Especially, a helicopter moves more freely than a plane. We need more considerations and it is more difficult to visualize the terrain and scene of the virtual world for a helicopter VR...