• 한국CDE학회논문집
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• 제17권5호
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• pp.333-341
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• 2012

Modeling and simulation is important for military training. People can feel perspective when stereoscope images are created using multi-channel visualizations. A submarine oscillates when the submarine is just below the surface of the sea, so that the reconnaissance becomes difficult. Also, the operator should read the information of the target within 6 seconds using the periscope. The operator must have experience. To solve these problems, stereoscopic multi-channel visualization has been tested. The iCAVE system of KAIST provides a large-scale screen, 7 PCs, and 14 projectors to create the stereoscope images. To simulate the motion of a submarine just below the ocean surface, a 4-DOF motion platform is used. The motion data is transmitted to the visual system and the motion platform through the UDP protocol. Variety of weather conditions are created using the Vega Prime software. The stereoscopic multi-channel visualization and the motion platform system created a realistic simulation system.

• ETRI Journal
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• 제35권2호
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• pp.352-355
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• 2013

Common stereoscopic three-dimensional (3D) display has a convergence and accommodation conflict that violates the natural human cognitive process of viewing. This weakness exposes the challenge in supporting fun factors while eliminating safety problems in the 3D viewing experience. Thus, human factors have become a major research topic. In this letter, we propose a 3D stereoscopic visualization platform that can expand the sense of a 3D space by fusing organically mixed stereoscopic displays to provide a continuous feeling of 3D depth. In addition, we present pilot test results to show the possibility of the technical implementation of the proposed platform and note ongoing research issues to be addressed.

• 디지털융복합연구
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• 제18권5호
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• pp.425-432
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• 2020

입체영상 기술은 디지털 영상 분야의 중요한 갈래이며, 지난 20여년 동안 연구와 발전을 거쳐 크게 성장하였다. 이 기술은 많은 분야에서 더 다양화되고 중요한 영상콘텐츠 제작 방법으로 발전하고 있다. 입체영상 기술에 기초한 홀로그램 투영 기술은 1947년 영국 헝가리계 물리학자 대니얼 가버의 이론적 연구 이후 홀로그램 기술은 지속적이면서 빠른 속도로 발전해 사회적으로 이슈화 되었다. 현재 진정한 홀로그램 기술에는 미치지 못하지만, 이와 유사한 기술을 활용한 입체영상 작품이 다양한 분야에 응용되면서 점점 더 중요하게 부각되고 있다. 본 연구는 디지털 영상콘텐츠 디자인 설계의 관점에서 고전적이고 창의적인 입체영상 기술을 활용한 콘텐츠 사례를 분석하고 홀로그램 투영의 멀티프로토콜 방향을 모색하였다.

• 한국가시화정보학회:학술대회논문집
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• 한국가시화정보학회 2004년도 추계학술대회 논문집
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• pp.102-103
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• 2004

Simultaneous CH and OH planar laser induced fluorescence(PLIF) and stereoscopic particle image velocimetry(PIV) measurements have been developed to investigate the local flame structure of turbulent premixed flames. The developed simultaneous two radical concentrations and three component velocity measurements on a two-dimensional plane was applied for relatively high Renolds number turbulent premixed flames in a swirl stabilized combustor. All measurements were conducted for methane-air premixed flames in the corrugated flamelets regime. Strong three-dimensional fluctuation implies that misunderstanding of the flame/turbulent interactions would be caused by the analysis of two-component velocity distribution in a cross section. Furthermore, comparisons of CH-OH PLIF and three-component velocity field show that the burned gases not always have high-speed velocity in relatively high Renolds number turbulent premixed flame.

• 인터넷정보학회논문지
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• 제16권2호
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• pp.117-125
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• 2015

단백질 기능을 규명하는 단백질 구조 정보는 단백질 의약품의 약효를 증진시키고, 개발을 단축시키는데 큰 영향을 미친다. 따라서 단백질의 구조를 효과적으로 분석하기 위한 단백질 가시화에 대한 연구가 증가하고 있다. 하지만 단백질 가시화에 대한 연구가 단백질의 구조를 예측하거나 렌더링의 속도를 향상시키는 것을 중심으로 이뤄지고 있으며, 단백질 가시화 형태에 따른 정보 전달 효용성에 대한 연구는 미비한 실정이다. 본 연구는 단백질 의약품에 대한 효율적인 정보 서비스의 사전 연구로써 단백질 1, 2차구조 혼합가시화 형태별 정보표현적합도를 분석하였다. 단백질 1, 2차구조 혼합가시화 형태는 대표적 가시화 서비스인 Chimera, PDB, Cn3D와 기존 가시화 서비스의 문제점을 개선한 단백질 1, 2차구조 혼합가시화 형태를 대상으로 하였다. 정보표현적합도를 구하기 위한 정보요인은 피험자 분석 결과를 바탕으로 단백질 1차구조, 아미노산 위치, 단백질 2차구조, 단백질 2차구조 비율정보로 구분하였으며, 피험자는 단백질 의약품 업계종사기간이 5년 이상인 전문가 집단을 대상으로 하였다. 그 결과 단백질 1, 2차구조 혼합가시화형태별 정보표현적합도에는 유의미한 차이가 있었으며, 가시화 형태별 정보 전달 효용성에 차이가 있음을 입증할 수 있었다.

• Journal of Multimedia Information System
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• 제4권1호
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• pp.1-8
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• 2017

In recent years, the quixotic nature and concentration of rainfall due to global climate change has intensified. To monitor localized heavy rainfalls, a reliable disaster monitoring and warning system with advanced remote observation technology and high-precision display is important. In this paper, we propose a GIS-based intuitive and realistic 3D radar data display technique for accurate and detailed weather analysis. The proposed technique performs 3D object modeling of various radar variables along with ray profiles and then displays stereoscopic radar data on detailed geographical locations. Simulation outcomes show that 3D object modeling of weather radar data can be processed in real time and that changes at each moment of rainfall events can be observed three-dimensionally on GIS.

• 한국정보통신학회논문지
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• 제19권2호
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• pp.486-492
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• 2015

방사선 영상장치는 방사능 누출사고의 조기처리 및 확산 피해 최소화에 필수적인 장비이며, 가까운 미래에 빅마켓으로 성장될 원전폐로 분야에서도 중요한 역할을 담당할 것으로 예상된다. 현재까지 개발된 방사선 영상장치는 방사선 오염원의 위치를 방향 정보만으로 탐지하여 가시화하고 있고 방사선원의 거리 측정은 불가능한 실정이다. 본 논문에서는 스테레오 카메라 원리를 적용하여 방사선원의 3차원 위치정보를 추출할 수 있는 새로운 기법의 방사선 3차원 영상장치의 구현에 대해 연구하였다. 한 대의 방사선 센서와 CCD 카메라, 그리고 팬틸의 컴팩트한 구성으로 설계된 방사선 3차원 영상장치(K3-RIS)는 위치변환 제어에 의한 스테레오 방사선 영상 취득과 연속모드 제어 및 고속 스테레오 영상정보처리 기능이 특징이다. 개발한 장치의 기능검증을 위해 감마 방사선원(Cs-137)을 대상으로 실험을 수행한 결과 선원간의 거리와 무관하게 3% 이하의 거리측정 오차를 확인하였다.

• 한국소음진동공학회논문집
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• 제20권11호
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• pp.1078-1088
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• 2010

In order to analyze the quantitative characteristics of acoustic streaming, experimental setup of 3-D stereoscopic PIV(particle imaging velocimetry) was designed and quantitative ultrasonic flow fields in the gap between the ultrasonic vibrator and heat source were measured. Utilizing acoustic streaming induced by ultrasonic vibration, surface temperature drop of cooling object was also measured. The study on smart cooling method by acoustic streaming induced by ultrasonic vibration was performed due to the empirical relations of flow pattern, average flow velocity, different gaps, and enhancement on cooling rates in the gap. Average velocity fields and maximum acoustic streaming velocity in the open gap between the stationary cylindrical heat source and ultrasonic vibrator were experimentally measured at no vibration, resonance, and non-resonance. It was clearly observed that the enhancement of cooling rates existed owing to the acoustic air flow in the gap at resonance and non-resonance induced by ultrasonic vibration. The ultrasonic wave propagating into air in the gap creates steady-state secondary eddy called acoustic streaming which enhances heat transfer from the heat source to encompassing air. The intensity of the acoustic streaming induced by ultrasonic vibration experimentally depended upon the gap between the heat source and ultrasonic vibrator. The ultrasonic vibration at resonance caused the increase of the acoustic streaming velocity and convective heat transfer augmentation when the flow fields by 3D stereoscopic PIV and temperature drop of the heat source were measured experimentally. The acoustic streaming velocity of air enhancement on cooling rates in the gap is maximal when the gap agrees with the multiples of half wavelength of the ultrasonic wave, which is specifically 12 mm.

• 한국수소및신에너지학회논문집
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• 제23권5호
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• pp.538-544
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• 2012

The bubbles made of hydrogen and oxygen gases producted by electrolysis disturb the electrolysis, but the behavior of these bubbles in the electrolysis stack isn't clearly defined. In order to study on the behavior of bubbles in the flow pattern of the meshes type separator, the flow visualization experiment was performed by using of a visible alkaline electrolysis stack and a stereoscopic microscope. As the results, a fine size bubbles adhered to the separator's surface in the electrolyte solution have grown large sized bubbles until each bubble's buoyance is lager than the sum of surface adhesion force and weight. And then the large bubbles flow into the upper area of the separator. Also, as wide area of the separator have been occupied by various sized bubbles, the electrolysis efficiency is declined.

• 한국수소및신에너지학회논문집
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• 제24권1호
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• pp.84-90
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• 2013

The hydrogen or oxygen gas producted by electrolysis become many bubbles in the electrolyte, but exact data on the behavior of these bubbles in the separator of an electrolysis stack didn't become known. In this study, the flow visualization experiment on the behavior of bubbles in the flow pattern of the array type separator is performed by using of a visible alkaline electrolysis stack and a stereoscopic microscope. As the results, a fine size bubbles adhered to the surface of the flow pattern grow to large sized bubbles until each bubble's buoyance is lager than the sum of external force and weight. And then the large bubbles flow into the upper area of the separator. Bubbles adhered to the surface of the vertical flow pattern grow quickly than them adhered to the surface of the horizontal flow pattern. Also, he electrolysis efficiency is declined because many multi-size bubbles occupied the wide volume in the flow pattern.