• 한국실내디자인학회논문집
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• 제16권2호
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• pp.339-346
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• 2007

This thesis has purpose of explaining that light is not only appreciated but also physically percepted in contemporary space design and examining effects of space experience through the physical perception. In keeping with such developments, light has been perceived as the object of another architectural tool in modern space design and has provided men with new experience by providing space image and function different from previous ones. With the expansion of the area of light, light has changed a space that is not a simple architectural factor into the essential concept that gives the architectural space image ! by combining it with architectural space, structure, form and materials throughout the whole process from the beginning to the completion. Through phenomenological approach, light is percepted and experienced by body movement, intervention of senses and memories, and passing of time. The percepted and experienced light brings increase of mutual understanding in space, activation and continuance of user's sensation, recreational experience by event occurrence and space experience effect thorough information from media.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송∙미디어공학회 2018년도 하계학술대회
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• pp.20-21
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• 2018

행렬의 rank 최소화 기법은 영상 잡음 제거, 행렬 완성(completion), low rank 행렬 복원 등 다양한 영상처리 분야에서 효과적으로 이용되어 왔다. 특히 nuclear norm 을 이용한 low rank 최소화 기법은 convex optimization 을 통하여 대상 행렬의 특이값(singular value)을 thresholding 함으로써 간단하게 low rank 행렬을 얻을 수 있다. 하지만, nuclear norm 을 이용한 low rank 최소화 방법은 행렬의 rank 값을 정확하게 근사하지 못하기 때문에 잡음 제거가 효과적으로 이루어지지 못한다. 본 논문에서는 영상의 잡음을 제거 하기 위해 다중 잡음 제거 영상을 이용하여 유사도가 높은 유사 패치 행렬을 구성하고, 유사 패치 행렬의 rank 를 non-convex function 을 이용하여 최소화시키는 방법을 통해 잡음을 제거하는 방법을 제안한다.

• 한국멀티미디어학회논문지
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• 제16권5호
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• pp.647-656
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• 2013

시각 재현을 욕망했던 인류 염원은 선형적 역사의 발전 속에서 진보한다. 이때 지향점은 '눈'이었다. 목표지점이 설정된 후, 시각 이미지는 재현을 넘어 주체의 반영을 시도하고, 나아가 주체의 심급 속에 잠재되어 있던 욕망을 시각화하고자 했다. 물론 회화, 사진, 영화에서도 욕망의 무대로서 환상은 경험할 수 있었으나, 디지털은 환상 세계의 창조에 새로운 국면을 제시하고 있다. 본 연구는 주체성과 무의식이 반영되어 환상이미지가 창조되는 디지털영상에서의 환상성에 대해 밝혀보고자 하였다. 연구결과, 디지털 이미지는 이드 속에 저장되었던 이미지와 상상적 욕망이 시각화되는 통로로서 핍진적 이미지를 기반으로 완벽한 환상의 무대로 창조함을 알 수 있었고, 자아와 초자아에 의해 억제되었던 이드를 부상시키면서 욕망실현에 대한 경험을 주체에게 부여하고 있었다.

• 한국멀티미디어학회논문지
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• 제23권11호
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• pp.1428-1434
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• 2020

Virtual reality (VR) and augmented reality (AR) technologies can interact intuitively using virtual 3D images. Information signs on buildings that are frequently used by the public play a very important role in conveying information. However, the current information sign has different understanding and interpretation, and it is difficult to communicate quickly and intuitively for interaction. The purpose of this study is to increase the efficiency of information signing through information provision using mobile augmented reality. The InfoAR app not only guides you to the destination of the building, but also acts as a marker for the logo image. The logo image created based on the feature points recognizes the information of the destination. It is converted to AR through a mobile app, allowing users to easily find their destination by obtaining specific information. In addition, it presents interactions that can enlarge, reduce, move, and rotate information about virtual objects augmented through a function called AR. In the future, if user convenience and usability of the interface are added, research is conducted, and the level of completion is improved, such as using VR contents and promotions and business cards, it is expected that highly useful contents will be produced.

• 전기학회논문지
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• 제61권3호
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• pp.407-412
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• 2012

This study investigated the process of thermal-induced growth of micro-crack developed at the crystalline solar cell using EL image, determined the output characteristic according to the pattern of micro-crack, analyzed the I-V characteristic according to the pattern of crack growth, and predicted the output value using simulation. The purpose of this study was, therefore, to investigate the process of thermal-induced growth of micro-crack developed at the early stage of PV module completion using EL image, to analyze the resulting decrement of output and predict the output value using simulation. It was observed that the crack grew increasingly by the thermal condition, and accordingly the lowering of output was accelerated. The output values of crack patterns with various direction were predicted using simulation, resulting in close I-V curve with only around 4% of error rate. It is considered that it is possible to predict the electric characteristic of solar cell module using only pattern of micro-crack occurred at solar cell based on our results.

• Journal of Radiation Protection and Research
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• 제46권3호
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• pp.120-126
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• 2021

Background: This paper aims to evaluate the clinical utility and radiation dosimetry, for the mobile X-ray imaging of patients with known or suspected infectious diseases, through the window of an isolation room. The suitability of this technique for imaging coronavirus disease 2019 (COVID-19) patients is of particular focus here, although it is expected to have equal relevance to many infectious respiratory disease outbreaks. Materials and Methods: Two exposure levels were examined, a "typical" mobile exposure of 100 kVp/1.6 mAs and a "high" exposure of 120 kVp/5 mAs. Exposures of an anthropomorphic phantom were made, with and without a glass window present in the beam. The resultant phantom images were provided to experienced radiographers for image quality evaluation, using a Likert scale to rate the anatomical structure visibility. Results and Discussion: The incident air kerma doubled using the high exposure technique, from 29.47 µGy to 67.82 µGy and scattered radiation inside and outside the room increased. Despite an increase in beam energy, high exposure technique images received higher image quality scores than images acquired using lower exposure settings. Conclusion: Increased scattered radiation was very low and can be further mitigated by ensuring surrounding staff are appropriately distanced from both the patient and X-ray tube. Although an increase in incident air kerma was observed, practical advantages in infection control and personal protective equipment conservation were identified. Sites are encouraged to consider the use of this technique where appropriate, following the completion of standard justification practices.

• 한국게임학회 논문지
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• 제12권2호
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• pp.3-14
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• 2012

타격감은 게임을 보다 재미있고 높은 완성도를 가질 수 있도록 만들어주는 요소 중 하나로서 영상, 음향, 체감(진동)효과를 통해 구현된다. 게임 개발자는 자신이 만드는 게임에 타격감을 구현할때 게임의 장르나 시스템, 세계관 등을 고려하여 적합한 효과와 기법들을 선택하게 되는데 일반적으로 이전 프로젝트 때의 경험이나 타 게임의 사례분석을 통하여 구현하는 경우가 대부분이다. 이처럼 타격감이 가지는 중요성에 비하여 체계적인 개발방법이나 관련 연구는 아직 미미한 상태이다. 본 논문에서는 타격감을 표현하는 각 기법들이 가지는 속성과 감각의 정도를 실험을 통해 조사 분석하여 이들이 타격감에 미치는 효율과 요인에 대한 연구를 소개한다. 이를 위해서 각 타격감 표현 기법들을 시뮬레이션할 수 있는 타격감 시뮬레이터를 제작하고 게이머들을 대상으로 설문조사를 진행하여 최종 결과를 도출한다. 이 결과를 통해 현업의 개발자들, 특히 모바일이나 웹게임 등 한정된 자원이나 기간내에 개발해야 할 때, 보다 높은 효율의 타격감을 표현하는 기법들을 우선적으로 적용할 수 있도록 하여 보다 완성도 높은 게임개발에 도움이 되었으면 한다.

• 한국의상디자인학회지
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• 제13권4호
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• pp.189-198
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• 2011

The existing approaches to the body painting have been dominated by the angles focused on the 'performance' and the 'body art'. The performance-focused approach, in which body painting serves simply as a make-up for the performer, one of the elements of performance to help it communicate effectively its meaning and come to perfection, might be in itself lacking in the attention to the placement of the body painting as a new genre of art. This thesis has two aims to explain the concept of Allegory as the contemporary meaning and to examined the formative characteristics and other characteristics of Allegory through theoretical research. For this purpose, this study is based upon allegorical cognition of Walter Benjamin and the allegorical method of Craig Owens. The formative characteristics of allegory are summarized as appropriation, deconstruction and site-specificity as follows. First, the constructed result has contrived characters because its image which derived from body painting based on the past shown image. Second, Allegoric body painting refuses an aesthetically valuable piece which can be interpreted formal completion, it shows intactly deconstruction of its configuration, substance and style. Third, Allegoric body painting has site-specificity facts which can be expressed for diverse meanings. Through these facts, the final goal of this thesis will find specific character for Allegory and apply to body painting.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제18권2호
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• pp.157-166
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• 2014

If there are metals located in the X-ray scanned object, a point outside the metals has its range of projection angle at which projections passing through the point are disturbed by the metals. Roughly speaking, this implies that attenuation information at the point is missing in the blocked projection range. So conventional projection completion MAR algorithms to use the undisturbed projection data on the boundary of the metaltrace is less efficient in reconstructing the attenuation coefficient in detailed parts, in particular, near the metal region. In order to overcome this problem, we propose the algebraic correction technique (ACT) to utilize a pre-reconstructed interim image of the attenuation coefficient outside the metal region which is obtained by solving a linear system designed to reduce computational costs. The reconstructed interim image of the attenuation coefficient is used as prior information for MAR. Numerical simulations support that the proposed correction technique shows better performance than conventional inpainting techniques such as the total variation and the harmonic inpainting.

• International Journal of Computer Science & Network Security
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• 제23권3호
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• pp.94-100
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• 2023

The primary goal of any communication spacecraft is to provide communication in variety of frequency bands based on mission requirements within the Indian mainland. Some of the spacecrafts operating in S-band utilizes a 6m or larger aperture Unfurlable Antenna (UFA for S-band links and provides coverage through five or more S-band spot beams over Indian mainland area. The Unfurlable antenna is larger than the satellite and so the antenna is stowed during launch. Upon reaching the orbit, the antenna is deployed using motors. The deployment status of any deployment mechanism will be monitored and verified by the telemetered values of micro-switch position before the start of deployment, during the deployment and after the completion of the total mechanism. In addition to these micro switches, a camera onboard will be used for capturing still images during primary and secondary deployments of UFA. The proposed checkout system is realized for validating the performance of the onboard camera as part of Integrated Spacecraft Testing (IST) conducted during payload checkout operations. It is designed for acquiring the payload data of onboard camera in real-time, followed by archiving, processing and generation of images in near real-time. This paper presents the architecture, design and implementation features of the acquisition, processing and Image generation system for Camera onboard spacecraft. Subsequently this system can be deployed in missions wherever similar requirement is envisaged.