• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 춘계학술대회
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• pp.579-580
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• 2022

가상현실이 주목받으면서 가장 대중적이고 성공적인 VR콘텐츠로 VR 방 탈출 게임을 기준으로 하였다. 본 연구에서는 실제 VR 방 탈출과 현장형 방 탈출을 체험한 시민들의 설문결과를 토대로 하였다. 현재 구현이 가능한 부분과 기술적인 한계가 있는 부분을 명확히 한다. 그리고 VR 방 탈출게임의 몰입감을 높일 수 있는 요소들을 분석한다. 연구의 의의로 더욱 발전된 VR 방 탈출 게임과 더 나아가 VR콘텐츠의 제작에 기여할 수 있기를 바란다.

• 한국전산유체공학회지
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• 제16권1호
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• pp.30-35
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• 2011

In this paper, our effort to apply 3-D Virtual Reality system for stereoscopic visualization of mesh data on the web is briefly described. This study is an extension of our previous and on-going research efforts to develop an automatic grid generation program specialized for wing mesh, named as eGWing. The program is developed by using JAVA programming language, and it can be used either as an application program on a local computer or as an applet in the network environment. In this research advancing layer method(ALM) augmented by elliptic smoothing method is used for the structured grid generation. And to achieve a stereoscopic viewing capability, two graphic windows are used to render its own viewing image for the left and right eye respectively. These two windows are merged into one image using 3D monitor and the viewers can see the mesh data visualization results with stereoscopic depth effects by using polarizing glasses. In this paper three dimensional mesh data visualization with stereoscopic technique combined with 3D monitor is demonstrated, and the current achievement would be a good start-up for further development of low-cost high-quality stereoscopic mesh data visualization system which can be shared by many users through the web.

• 전자통신동향분석
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• 제34권2호
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• pp.10-18
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• 2019

Since the introduction of CRT(Cathode Ray Tube) in the 1950s, display technologies have been developed continuously. Flat panel displays such as PDP(Plasma Display Panel) and LCD(Liquid Crystal Display) were commercialized in the late 1990s, and OLED(Organic Light Emitting Diodes) and Micro-LED(Micro-Light Emitting Diodes) are now being developed and are becoming widespread. In the future, we expect to develop ultra-realistic, flexible, embedded sensor displays. Ultra-realistic display can be applied to AR/VR(Augmented Reality/Virtual Reality) devices and spatial light modulators for holography. The sensor-embedded display can be applied to robots; electronic skin; and security devices, including iris recognition sensors, fingerprint recognition sensors, and tactile sensors. AR/VR technology must be developed to meet technical requirements such as viewing angle, resolution, and refresh rate. Holography requires optical modulation technology that can significantly improve resolution, viewing angle, and modulation method to enable wide-view and high-quality hologram stereoscopic images. For electronic skin, stable mass production technology, large-area arrays, and system integration technologies should be developed.

• International Journal of Internet, Broadcasting and Communication
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• 제10권2호
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• pp.19-24
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• 2018

This study investigated the academic stress and the immersion in learning in relation to AR and VR assisted instructions compared to traditional approaches. To that end, 78 $8^{th}$ graders in T and S city in Gangwondo were assigned to experimental and control groups. The experimental group received the VR and AR lessons. The academic stress was measured with the pre- and post-test scores, while the immersion in learning was measured with the post-test scores. In brief, AR and VR assisted lessons made statistically significant differences in the academic stress and immersion in learning in comparison to the traditional approaches.

• 센서학회지
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• 제32권1호
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• pp.22-30
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• 2023

Innovative and advanced technologies, including robots, augmented reality, virtual reality, the Internet of Things, and wearable medical equipment, have largely emerged as a result of the rapid evolution of modern society. For these applications, pressure monitoring is essential and pressure sensors have attracted considerable interest. To improve the sensor performance, several new designs of pressure sensors have been researched based on resistive, capacitive, piezoelectric, optical, and triboelectric types. In particular, optical pressure sensors have been actively studied owing to their advantages, such as robustness to noise and remote sensing capability. Herein, a review of recent research on optical pressure sensors with self-powered sensing, remote sensing, high spatial resolution, and multimodal sensing capabilities is presented from the viewpoints of design, fabrication, and signal processing.

• International Journal of Internet, Broadcasting and Communication
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• 제16권3호
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• pp.77-84
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• 2024

Aberration is still a problem for making augmented reality displays. The existing methods to solve this problem are either slow and inefficient, consume too much battery, or are too complex for straightforward implementation. There are still some problems with image quality, and users may suffer from eye strain and headaches because the images provided to each eye lack accuracy, causing the brain to receive mismatched cues between the vergence and accommodation of the eyes. In this paper, we implemented a computer simulation of an optical aberration using Zernike polynomials which are defocus, trefoil, coma, and spherical. The research showed that these optical aberrations impact the Point Spread Function (PSF) and Modulation Transfer Function (MTF). We employed the phase conjugate technique to mitigate aberrations. The findings revealed that the most significant impact on the PSF and MTF comes from the influence of spherical aberration and coma aberration.

• International journal of advanced smart convergence
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• 제6권1호
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• pp.9-17
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• 2017

Recent development in virtual and augmented reality increases the demand for content in many different fields. One of the fast ways to create content for VR is 3D modeling of real objects. In this paper we propose a system to reconstruct three-dimensional models of real objects from the set of two-dimensional images under the assumption that the subject does not has distinct features. We explicitly consider an object that is made of one or more surfaces and radiant constant energy isotropically. We design a low cost portable multi camera rig system that is capable of capturing images simultaneously from all cameras. In order to evaluate the performance of the proposed system, comparison is made between 3D model and a CAD model. A simple algorithm is also proposed to acquire original texture or color of the subject. Using best pattern found after the experiments, 3D model of the Pyeongchang Olympic Mascot "Soohorang" is created to use as VR content.

• International Journal of Internet, Broadcasting and Communication
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• 제16권1호
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• pp.163-168
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• 2024

Technologies that are considered to be a part of the fourth industrial revolution include holograms, augmented reality, and virtual reality. As technology advances, the industry's scale is growing quickly as well. While the development of technology for direct use is moving slowly, awareness of floating holograms-which are considered realistic content-is growing as the industry's scale and rate of technological advancement continue to accelerate. Specifically, holograms that have been incorporated into museums and exhibition spaces are static forms of content that viewers gaze at inertly. Additionally, their use in educational fields is very passive and has a low rate of utilization. Therefore, in order to improve usability from the viewpoint of viewers of realistic content, such as exhibition halls or museums, we introduce realistic content control technology in this study using a machine learning framework to recognize hands. It is anticipated that using the study's findings, manipulating realistic content independently will enhance comprehension of objects presented as realistic content and boost its applicability in the industrial and educational domains.

• ETRI Journal
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• 제46권2호
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• pp.250-262
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• 2024

Air-writing recognition is relevant in areas such as natural human-computer interaction, augmented reality, and virtual reality. A trajectory is the most natural way to represent air writing. We analyze the recognition accuracy of words written in air considering five features, namely, writing direction, curvature, trajectory, orthocenter, and ellipsoid, as well as different parameters of a hidden Markov model classifier. Experiments were performed on two representative datasets, whose sample trajectories were collected using a Leap Motion Controller from a fingertip performing air writing. Dataset D₁ contains 840 English words from 21 classes, and dataset D₂ contains 1600 English words from 40 classes. A genetic algorithm was combined with a hidden Markov model classifier to obtain the best subset of features. Combination ftrajectory, orthocenter, writing direction, curvatureg provided the best feature set, achieving recognition accuracies on datasets D₁ and D₂ of 98.81% and 83.58%, respectively.

• 디자인학연구
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• 제20권3호
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• pp.119-128
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• 2007

디지털 기술이 발전하면서 산업디자인 프로세스에 컴퓨터를 활용하는 CAID 필수적인 부분이 되었다. 3차원 모델을 렌더링 하여 사진과 같은 최종 이미지 결과물이 만들어내는 것은 CAID에 특화된 작업들 중 하나이다. 이 작업을 위해 디자이너는 가상 모델의 재질, 조명, 카메라 둥의 위치 및 세부 변수들을 적절히 조절하여야 한다. 기존 CAID도구의 사용자 인터페이스는 이러한 속성을 컴퓨터 그래픽 연산을 위한 변수 설정 창에서 주로 해결하고 있어 디자이너들이 사용하는데 어려움을 겪고 있다. 본 논문에서는 CAID를 위한 디지털 렌더링 작업 특히 라이팅과 관련된 인터페이스 문제를 해결하기 위해 증강현실(Augmented Reality)과 실체적 인터페이스(Tangible Interface)를 활용한 가상의 라이트 조작 도구, TLS(Tangible Lighting Studio)를 제안하였다. 이는 카메라의 위치 설정, 라이팅 효과를 위한 변수설정의 인터페이스를 실체화하고 작업공간에 분산시킴으로써 보다 직관적인 렌더링 작업을 지원하는 도구이다. TLS는 가상의 광원, 카메라, 렌더링 대상 등을 물리적으로 직접 조작할 수 있는 마커, 컨트롤러 유닛들, 사용자가 착용하는 비디오 투시형 HMD 등으로 구성된다. 이를 활용하여 사용자는 증강현실 작업공간에서 직접 라이팅 속성을 조정할 수 있다. 유용성 평가 실험을 통하여 TLS가 기존 CUI(Graphic User Interface)기반 시스템보다 유효성, 효율성 그리고 사용자 만족도가 높다는 점을 발견하였다. TLS는 CAID도구의 인터페이스 분야뿐만 아니라 광원과 카메라의 효과를 활용하는 건축, 사진 촬영 교육 등의 분야에서 효과적으로 활용될 수 있으리라 기대된다.