• ETRI Journal
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• 제36권2호
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• pp.232-241
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• 2014

A holographic display system with a 22-inch LCD panel is developed to provide a wide viewing angle and large holographic 3D image. It is realized by steering a narrow viewing window resulting from a very large pixel pitch compared to the wave length of the laser light. Point light sources and a lens array make it possible to arbitrarily control the position of the viewing window for a moving observer. The holographic display provides both eyes of the observer with a holographic 3D image using two vertically placed LCD panels and a beam splitter to support the holographic stereogram.

• ETRI Journal
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• 제39권4호
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• pp.480-492
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• 2017

A holographic display based on a viewing window enables the converging of a reconstruction wave into a viewing window by means of an optical system. Accordingly, a user can observe a reconstructed hologram image, even with a small diffraction angle. It is very difficult to manufacture an optical system with no aberrations; thus, it is inevitable that a certain amount of wave aberrations will exist. A viewing-window-based holographic display, therefore, always includes distortions in an image reconstructed from a hologram pattern. Compensating the distortions of a reconstructed image is a very important technical issue because it can dramatically improve the performance when reconstructing a digital three-dimensional content image from a hologram pattern. We therefore propose a method for suppressing image distortion by measuring and compensating the wave aberration calculated from a Zernike polynomial, which can represent arbitrary wave aberrations. Through our experimental configuration using only numerical calculations, our proposed method decreased the reconstructed image distortion by more than 28%.

• 한국실내디자인학회논문집
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• 제8호
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• pp.58-64
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• 1996

People live in an environment which affects the human b by way of ‘Affordance’ .. And the interaction between h human and the surrounding environment arises ‘the sense of place' through adoptation. Considering the human emo¬t tional and psychological needs, besides the functionalones, for the design of environment gives ‘the place’ the h humanized atmosphere. Then the viewing-window, re¬f fleeting the dweller’s sensibility and aesthetic aspect, be¬c comes an important design element for the human interi¬o or atmosphere. G Generally, the view has the character of the Panorama a and sometimes of the Picture. And the viewing - window t transfigures the visual effects by ways of ‘Framing’, at t taching the ’Screen’ and ‘Successive development' of the views through openings on the wall. Hence this study w was developed from the aesthethic view-points of archi t tecture, cinema, picture and photography etc., and the c conclusions are as follows. T The ‘Frame’ limits the boundary of the view into a p particular area, while the ‘Screen’ changes the clear view t to an obscure one. And the wall-openings located with i intervals show the fragments of the outer view in a suc¬c cessive way. And these techniques applied to the viewing window make the viewer have the associated meanings d derived from the ‘Guided Projection'. So, the associative p psychology of the viewer complements the partiality, ob¬s scurity and brokenness of the view into a complete one, a and finally the view comes to be an aesthetic one to the v vIewer.

• 대한조선학회논문집
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• 제51권4호
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• pp.291-299
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• 2014

In the design process of ship or its comprising components, the key to the successful design is how to guarantee the structural safety satisfying the international standard and regulation, which sometimes is not clear enough to cover the detail designs. This study deals with the design procedure for submersible viewing window installed in catamaran. As the window material, the Plexiglass, a type of reinforced plastic, is considered to satisfy the design requirements of international standard. Window thickness is calculated using geometric nonlinear finite element analysis, in order to take into account possible large deformation due to low stiffness of the Plexiglass, and the results are compared with those determined by the procedure specified in ISO12216. Finally, for the validation of proposed design, the pressure test had been carried out following the procedure specified in the standard, and structural safety was checked.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.1308-1311
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• 2009

The authors describe a 360 degree viewing display that can be viewed from any direction. To generate all-around 360 degree viewing window, we developed a sp ecial diffusion screen with one viewing aperture using holographic optical elements.

• 산업진흥연구
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• 제5권2호
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• pp.1-7
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• 2020

본 연구는 실내 또는 실외를 조명으로 밝게 비추는 조명등에 관한 기술로서, 보다 상세하게 설명하면 외관을 구성하는 케이스에 사방으로 투시창을 만들고, 사방 투시창에 얇은 패널(panel) 형태로 가공된 옥돌을 부착하여 조명등을 구성함으로써, 옥돌을 통해 은은한 불빛이 실내 또는 실외로 조사(照射)되므로, 사용자에게 아늑함과 따스함을 제공하고, 실내 또는 실외의 인테리어 효과를 높이는 한편 원적외선과 음이온을 발산하며, 은은한 꽃향기를 방출하는 옥돌을 이용한 조명등에 관한 기술이다. 본 연구개발의 제품의 특징은 외관을 구성하는 케이스에 사방으로 투시창이 형성되고, 사방 투시창에 얇은 패널(panel) 형태로 가공된 옥돌을 부착하여 조명등이 구성되며, 스피커를 통해 사용자에게 유익한 음악, 불경, 성경, 시조 등의 음향을 발생시키는 옥돌을 이용한 조명등을 연구했다는데 의미가 있다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.250-252
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• 2006

The land surface temperature (LST) can be defined as a weighted average temperature of components which constitute a pixel. The coefficients of split-window algorithm for MTSAT-1R were obtained by means of a statistical regression analysis from radiative transfer simulations using MODTRAN 4.0 for a wide range of atmospheric, satellite viewing angle (SVA) and lapse rate conditions. 6 types of atmospheric profile data imbedded in the MODTRAN 4 are used for the radiative transfer simulations. The RMSE is clearly larger on warm and humid profiles than cold and dry profiles, especially when the satellite viewing angle and lapse rate are large. The derivation of LST equations according to the atmospheric profiles clearly decreased the RMSE without regard to the SVA and lapse rate. The bias and RMSE are decreased as the more controls factors included. This preliminary result indicates that the characteristics of atmosphere, SVA and lapse rate should be included in the LST equation.

• 대한원격탐사학회지
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• 제22권5호
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• pp.385-388
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• 2006

The land surface temperature (LST) can be defined as a weighted average temperature of components which constitute a pixel. The coefficients of split-window algorithm for MTSAT-1R were obtained by means of a statistical regression analysis from radiative transfer simulations using MODTRAN 4.0 for a wide range of atmospheric, satellite viewing angle (SVA) and lapse rate conditions. 6 types of atmospheric profile data imbedded in the MODTRAN 4 are used for the radiative transfer simulations. The RMSE is clearly larger on warm and humid profiles than cold and dry profiles, especially when the satellite viewing angle and lapse rate are large. The derivation of LST equations according to the atmospheric profiles clearly decreased the RMSE without regard to the SVA and lapse rate. The bias and RMSE are decreased as the more controls factors included. This preliminary result indicates that the characteristics of atmosphere, SVA and lapse rate should be included in the LST equation.

• Imaging Science in Dentistry
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• 제51권2호
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• pp.137-148
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• 2021

Purpose: This study aimed to assess the computer monitors used for analysis and interpretation of digital radiographs within the clinics of the Oral Health Centre of Western Australia. Materials and Methods: In total, 135 computer monitors(3 brands, 6 models) were assessed by analysing the same radiographic image of a combined 13-step aluminium step wedge and the Artinis CDDent 1.0^® (Artinis Medical Systems B.V.^®, Elst, the Netherlands) test object. The number of steps and cylindrical objects observed on each monitor was recorded along with the monitor's make, model, position relative to the researcher's eye level, and proximity to the nearest window. The number of window panels blocked by blinds, the outside weather conditions, and the number of ceiling lights over the surgical suite/cubicle were also recorded. MedCalc^® version 19.2.1 (MedCalc Software Ltd^®, Ostend, Belgium, https://www.medcalc.org; 2020) was used for statistical analyses(Kruskal-Wallis test and stepwise regression analysis). The level of significance was set at P<0.05. Results: Stepwise regression analysis showed that only the monitor brand and proximity of the monitor to a window had a significant impact on the monitor's performance (P<0.05). The Kruskal-Wallis test showed significant differences (P<0.05) in monitor performance for all variables investigated, except for the weather and the clinic in which the monitors were placed. Conclusion: The vast performance variation present between computer monitors implies the need for a review of monitor selection, calibration, and viewing conditions.

• 한국게임학회 논문지
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• 제15권4호
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• pp.121-132
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• 2015

본 연구는 웹에서의 e 스포츠 시청 행위 측정도구 개발과 시선추적 장치를 이용한 멀티태스킹 시청 분석 도구 및 방법을 설계하여 제안하였다. 이를 위해 하나의 스크린 안에서도 멀티태스킹이 빈번하게 일어나는 시청 행위를 시각적으로 기록하고 측정할 수 있는 개별 창 관심영역(WOI)을 설계하였고, 실시간으로 연구자가 연구참여자의 시청행위 패턴을 관찰할 수 있도록 실시간 스트리밍 및 녹화 소프트웨어인 OBS(Opensource Broadcaster Software) 플러그인(Plug-In)을 직접 개발하였다. 본 논문에서 제시한 방법론은 다음과 같은 의의가 있다. 첫째, 정지화면과 같이 제한된 웹 인터페이스 측정이 아닌 동영상과 같은 다이내믹 신을 기록할 수 있다. 둘째, 스크린에 여러 개의 창이 동시에 열려져 있어도 연구참여자가 어떠한 창을 주목하는지 정확하게 좌표를 기록할 수 있을 뿐 아니라 시각화된 정보로 확인할 수 있다. 셋째, 매우 자연스러운 일상적 상황에서 실험을 수행할 수 있어서 인위적인 실험실적 환경이나 실험 처치물이 아닌 이용자의 실제 콘텐츠 이용 패턴과 행태를 추적하는데 용이해 실험 자료의 객관적 타당도를 높일 수 있다.