• 방송공학회논문지
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• 제18권5호
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• pp.738-748
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• 2013

본 연구는 개인의 불편감을 최소로 유지한 상태에서 3D 자극의 깊이를 늘려나가는 수렴 훈련을 통해 시각적 불편감이 감소되는지를 알아보고자 수행되었다. 실험집단은 수렴 훈련에 사용된 자극의 입체시 깊이가 순차적으로 변화하는지 무선적으로 변화하는지에 따라 두 개의 훈련 집단으로 나뉘었다. 수렴 훈련은 약 2주 간격으로 3회 실시되었으며 훈련 집단의 융합영역(fusional range)을 증가시켰다. 수렴 훈련이 시각적 불편감에 미치는 영향을 평가하기 위해 훈련 회기의 전과 후에 3D 영상을 시청하게 한 뒤, 주관적인 시각적 불편감을 설문 문항으로 측정하였다. 실험 결과, 시각적 불편감은 훈련 자극의 깊이를 순차적으로 변화시킨 훈련집단에서 감소하였다. 이러한 결과는 반복된 수렴 훈련이 3D 환경에서 시각적 불편감을 줄이는 데 효과적일 수 있음을 시사한다.

• 대한인간공학회지
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• 제30권1호
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• pp.229-235
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• 2011

Objective: Making a new ergonomic interface system based on camera vision system, which helps the handicapped in home environment. Background: Enabling the handicapped to manipulate the consumer electronics by the proposed interface system. Method: A wearable device for capturing the eye image using a near-infrared(NIR) camera and illuminators is proposed for tracking eye gaze position(Heo et al., 2011). A frontal viewing camera is attached to the wearable device, which can recognize the consumer electronics to be controlled(Heo et al., 2011). And the amount of user's eye fatigue can be measured based on eye blink rate, and in case that the user's fatigue exceeds in the predetermined level, the proposed system can automatically change the mode of gaze based interface into that of manual selection. Results: The experimental results showed that the gaze estimation error of the proposed method was 1.98 degrees with the successful recognition of the object by the frontal viewing camera(Heo et al., 2011). Conclusion: We made a new ergonomic interface system based on gaze tracking and object recognition Application: The proposed system can be used for helping the handicapped in home environment.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제21권4호
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• pp.37-47
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• 2015

Purpose: Due to increase of interest in the viewing environment for the disabled, ordinances that are related to an optimal auditorium for the disabled are being executed. However, since there are no detailed criteria regarding the optimal auditorium, there is a necessity that it should be supported by more concrete criteria for installation. Therefore, the study is aimed to be utilized as basic data to suggest the criteria for installation of the optimal auditorium in the future through domestic and international legal standards and the analysis of design guidelines that are related to the auditorium for the disabled. Methods: First, legal standards and design guidelines that are related to the auditorium for the disabled were analyzed, and Second, items and things to be improved that are required to suggest the criteria for installation of the optimal auditorium in the future were looked into by comparing and analyzing each contents. Results: Items and considerations by items that are required to establish the criteria for installation of the optimal auditorium were looked into, and based on these results, concrete and standardized installation criteria can be suggested. Implications: Based on the analysis results, the optimal viewing environment for the disabled within cultural facilities can be created through establishment of more concrete installation criteria for the optimal auditorium in the future.

• 한국실내디자인학회논문집
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• 제20권4호
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• pp.174-182
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• 2011

This study analyzed visitors' behaviors in the viewpoint of Attraction Power and Holding Power of exhibits on the basis of exhibition layout of real science museums. Through the analysis, the study grasped efficiency of analysis index and exhibition environment elements which might have an effect on planning the exhibition space of a large-scale museum and producing detailed ranges of exhibition. The main indicators used are: 1. Attraction Power: it indicates the relative incidence of people who have stopped in front of an object/exhibit during the exhibition tour. It is calculated by dividing the number of people who stop by the total number of people who have visited the museum or gallery. 2. Holding Power: it measures the average time spent in front of an information/communication element. It is calculated by dividing the average time of stay by the time "necessary" to read an element. As a result of analyzing the exhibition areas of National Science Museum (Daejeon) and National Museum of Emerging Science and Innovation(Tokyo), the Holding Power was found to be relatively lower than the Attracting Power. This means that 3.5 out of 10 visitors stop in front of the exhibit in 6 exhibition areas, and among these, only 1/10 is used when compared to the user required time of the exhibits. In other words, like the method of deriving an analysis index, the stage of viewing can be categorized as Attracting Power and Holding Power, and because the stage from Attracting Power to the stage of Holding Power are strongly linked, it shows that it is not easy to display a meaningful result. Except, the general distribution of Attracting Power was shown to be high from the entrance area of the exhibition hall based on the standard of viewing sequence. Also, the Holding Power became sequentially lower according to the sequence of exhibition viewing and displayed a meaningful interrelationship with the distribution ratio of island exhibits. In the case of island exhibition method, it is less influenced by the movement flow of visitors when compared to the wall type method of exhibition and can be understood as an exhibition method that provides spatial chances enabling stopping and viewing.

• 감성과학
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• 제25권1호
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• pp.79-90
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• 2022

시감각기관을 통해 지각하는 1초 미만의 시간은 자극이 지속되었던 지속시간 이외의 요소인 비 시간적 특성에 의해 영향을 받는 것으로 알려져 있다. 그런데 거리 정보가 풍부하여 크기 항상성이 유지될 경우, 대상의 지속시간을 항상성 있게 지각한다는 연구들이 있다. 본 연구는 이전 연구들과는 달리 거리 정보를 제한한 실제 환경에서 크기 항상성과 시간 지각 항상성의 관계를 검증하였다. 이를 위해 참가자들의 양안 단서와 단안 단서를 제한하기 위한 장치를 고안하였다. 참가자들은 크기 항상성을 유지할 수 없었으며, 크기 착시가 발생하여 물리적 크기를 정확하게 지각할 수 없었다. 실험 1에서는 관찰 거리별 참조 자극과 시험 자극의 물리적 크기를 동일하게 제시하였다. 실험 결과 물리적 크기가 동일했음에도 불구하고 관찰 거리가 가까운 자극을 더 크게 지각하였으며, 자극이 더 오래 지속되었다고 지각하였다. 실험 2에서는 관찰 거리별 참조 자극과 시험 자극의 망막상 크기를 동일하게 통제하였다. 관찰 거리가 멀어질수록 자극의 물리적 크기는 커졌으나, 모든 자극의 지각된 크기가 동일하였다. 그 결과 모든 관찰 거리에서 대상의 지속시간을 항상성 있게 지각하였다. 본 연구 결과는 거리 정보가 제한되었을 때에도, 시간 지각이 대상의 지각된 크기에 영향을 받음을 보여준다. 또한 풍부한 거리 정보가 존재할 때, 관찰 거리가 달라지더라도 대상의 지속시간을 항상성있게 지각할 수 있음을 시사한다.

• 한국CDE학회논문집
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• 제13권6호
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• pp.429-439
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• 2008

With a remote operated manipulator system, the situation at a remote site can be rendered through remote visualized image to the operator. Then the operator can quickly realize situations and control the slave manipulator by operating a master input device based on the information of the virtual image. In this study, the remote operator visual support system (ROVSS) was developed for viewing support of a remote operator to perform the remote task effectively. A visual support model based on virtual environment was also inserted and used to fulfill the need of this study. The framework for the system was created by Windows API based on PC and the library of 3D graphic simulation tool such as ENVISION. To realize this system, an operation test environment for a limited operating site was constructed by using experimental robot operation. A 3D virtual environment was designed to provide accurate information about the rotation of robot manipulator, the location and distance of operation tool through the real time synchronization. In order to show the efficiency of the visual support, we conducted the experiments by four methods such as the direct view, the camera view, the virtual view and camera view plus virtual view. The experimental results show that the method of camera view plus virtual view has about 30% more efficiency than the method of camera view.

• Journal of Information Display
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• 제5권1호
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• pp.22-27
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• 2004

Photopolymers are quite promising candidates for holographic data storage and diffusers because of their high sensitivity and high refractive index modulation. New photopolymers were prepared using the cellulose ester binder bearing different kinds of monomer. The holographic gratings were elaborated successfully in these photopolymer samples by conventional optical interference method. We investigated the dynamic behavior of the diffraction efficiency and the effect of the functionality of the monomer doped into the polymer binder. Triacrylate monomer doped photopolymer showed the highest diffraction efficiency of around 80-90 %, even under low intensity of writing beam (I=2 mW/$cm^2$). We inscribed the gratings of the glass diffuser on the surface of the photopolymer and investigated their diffusion properties.

• 한국컴퓨터정보학회논문지
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• 제18권1호
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• pp.31-42
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• 2013

본 연구는 문헌연구를 통해 익스플로라토리움이 개발한 다양한 모바일 디바이스(Electronic Guidebook, Rememberer, I-Guides, eXspot)의 비간섭적 특성에 대해 조명했다. 인터랙티브 전시환경에서 관람객의 몰입경험과 의미 생성을 위해 모바일 디바이스에 필수적으로 요구되는 특성은 전시물과 관람객의 인터랙션에 대한 비간섭적 특성이었다. 모바일 디바이스의 사용성은 비간섭적 특성에 직접적인 영향을 미쳤고, 이로 인해 모바일 디바이스의 형태인자가 교체되었다. 또한 형태인자의 변화는 모바일 디바이스의 기능을 관람 경험에 대한 기억으로 축소시켰다. 또한 모바일 디바이스의 역할이 멀티미디어 가이드에서 관람 후 경험 상기 및 공유 활동을 지원하는 단순한 모바일 도구로 전환됨에 따라 연결완전성이 내재한 관람 모형의 구현이 불가능했다. 익스폴로라토리움이 실행한 일련의 프로젝트는 공통적으로 관람소요시간증가와 관람 후 심화 활동의 활성화 등의 효과를 거두었다. 하지만 박물관학적 관점에서 접근해 보면, 관람소요시간증가는 전시물과의 인터랙션으로 인한 효과가 아니라 관람 기록(MyExploratorium)이 생성되는 사진에 대한 흥미로부터 비롯되었기 때문에 개념적 타당성이 충분하지 않았다. 결론적으로 익스폴로라토리움이 개발했던 모바일 디바이스는 '개인화 기반의 관람경험확장을 최적화하기 위한 하나의 학습지원도구'라고 정의할 수 있다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1999년도 하계종합학술대회 논문집
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• pp.609-614
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• 1999

Our present ability to work with video has not been confined to wired communication environment. This paper describes the new technological trend of wireless video communication. In wireless video communication, unlike wired network, several techniques are needed. At first, error robust video coding is essential. Due to characteristics of wireless channel, the system is exposed to more error prone environment. In addition, encoded video bit streams are vulnerable to the error because of the entropy coding. Recently many frameworks are developed to cope with this problem. We just explore the numerous robust video coding approaches with the viewing of error control. And more we discuss other on going research topics in this wireless video communication fields like low-power assumption design, trans-codec technique, and rate control schemes in brief.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2017년도 추계학술발표대회
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• pp.888-890
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• 2017

VR browser is one of the most popular applications for VR(Virtual Reality) environment. However, because most of the web contents are not designed considering the VR environment, scrolling the web pages in the VR browser causes much visual discomfort. We found it's because the angular velocity of the eye movement during scrolling increased because the viewing distance got closer compared with legacy devices. So we have developed a technology that regulates the scrolling to reduce the visual discomfort in the VR browser, in reference of the visual perception characteristics of the human visual system.