• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.183-184
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• 2023

스토리를 제대로 전달하려는 관점에서 제작자는 관객들이 무엇을 보게 할 것인가에 대한 고민이 필요하다. 즉, 관객의 시선을 시종일관 끌고 다녀야 한다. 그러한 관점과 더불어 관객이 일상에서 익숙한 공간감을 스크린 내에서도 확보해 줄 필요가 있다. 그러기 위해서는 영상의 깊이를 충분히 고려해야 하는데 이는 관객의 시선을 유도하는 반면에 현실 공간감을 확보하는 것이다. 스크린 내의 물체들을 자연 그대로의 원근감을 갖도록 촬영 환경을 구성하는 것도 필요하지만 스토리를 전개하는 피사체를 배경과 분리시킴으로써 자연스럽게 초점과 영점을 맞출 수 있도록 장면을 구현하는 것이다. 이를 위해서 제작(production) 단계에서는 촬영기법으로, 후반작업(post-production) 단계에서는 아웃 포커싱 등의 효과를 적용하는 방법 등이 고려될 수 있다. 본 논문에서는 영상의 깊이를 확보해야만 하는 이유와 이의 방법 등을 고찰해 본다.

• Journal of Korea Spatial Information System Society
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• v.9 no.3
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• pp.81-89
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• 2007

We analyzed the technology portfolio matrix for the car navigation technology using QFD method and accordingly suggested the navigation technology development direction. QFD is a useful tool to analyze the customer demands and the technologies. Depending on the survey results from the latent customers and the technology capabilities from the study of the national institutions, we suggested technology portfolio matrix. The visual HMI technology, safe driving support technology, and the navigator information management technology are the most prospective area for R&D investment according to the portfolio matrix.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04d
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• pp.503-505
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• 2003

패킷망을 통해 음성, 영상, 데이터를 동시에 제공할 수 있는 차세대 네트워크(NGN) 개념이 제안되어 현재 네트워크 상에 전개되어 가고 있다. 하지만 NGN의 Softswitch의 구성을 위해서는 현재의 PSTN 내의 Class 4/5 switch를 NGN의 구성에 맞게 끔 Access Gateway 및 Media Gateway로 교체해 나가야 하며 교체 후에도 소비자의 새로운 서비스 신설 요구에 신속하게 부합하기 위하여 기존 시스템의 서비스 중단없이 새로운 서비스 및 신규 프로토콜을 신속히 전개할 수 있는 개념은 필수적인 요소가 되었다. 이러한 점을 지원하기 위하여 본 논문에서는 개방형 네트워크 아키텍처 접근 방식인 Active Network의 개념을 응용한 차세대네트워크 Media Gateway Controller내의 이산 메커니즘 적용 Active Packet Processor도입하였다.

• Cartoon and Animation Studies
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• s.5
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• pp.517-524
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• 2001

인간의 내면에 숨어있는 양면성을 주제로 그 양면의 극적인 대조를 이용하여 인간의 고뇌를 그리고, 타이포애니메이션을 이용하고 영상과 사운드의 접목을 통하여 인간내면의 갈등구조를 그리고자 했다. 겉으로는 일상적으로 반복되는 생활이 평화스럽게 보이지만, 인간의 내면에서는 항상 갈등이 존재함을 한 방울씩 떨어지는 반복적인 물방울 소리와 영상, 그리고 다듬이질 소리를 이용해 다들이질 치는 심장박동을 표현함으로써 대신하고자 했으며, 이와 더불어 극적인 타이포애니메이션을 구현하고자 했다. 인간내면의 갈등구조, 화면의 스크레치와 노이즈의 표현으로 이를 더욱 심화하고, 흑과 백, 그리고 맑은 영상과 비트있는 사운드를 통한 평화스러움과 인간내면 갈등구조에서 고뇌하면서도 평화스러워 보이는 한 인간의 속내를 표현하고자 했다. 인간내면의 갈등이 존재함에도 불구하고 평화스러워 보일 만큼 일상에 젖어 인간본연의 가치를 쉽게 잊고 살아갈 수도 있는 인간의 양면성, 급속한 변화를 담고 있는 현대사회 구조에 적응하여 살아가면서 느껴야 하는 무기력, 반복적인 생활, 획일화되는 사람들, 그러면서도 어쩔 수 없이 존재하는 내면의 갈등구조, 이 모든 것을 짧은 영상물에 담기에는 한계가 있으나, 어떤 결론을 만들어 제시하는 것이 아니라 상황의 표현에 중점을 두고 작품을 전개하려 했다.

• Journal of the Korean Institute of Intelligent Systems
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• v.11 no.8
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• pp.736-741
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• 2001

The restoration optimum image from transformation image demands compound change of image change, calender reform, and multiple solution calculation. This study presents that system actively deal with outside interference, vibration, movement, mechanical feature on the operating or before the operating and avoids complicated mathematical numerical expression and revise based on expert knowledge based which applies Fuzzy Logic which is one of Artificial Intelligent technique.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.129-130
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• 2011

문 스펜서는 색채조화 문제를 각각 색채조화의 범위, 면적효과, 배색의 미도로 나누었다. 그리하여 기존의 색채 조화론의 부족한 점을 제거하여 보다 과학적이고 정량적인 조화이론을 전개했다. 본 논문에서는 비디오 영상의 미도 계산에 활용하여, 감성으로 취급되는 색채조화 및 부조화의 문제를 수치적으로 계산하였다. 그리하여 비디오 영상에서 색을 판별하여 미도가 좋은 배색인지 아닌지를 나타내었다.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.38 no.1
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• pp.43-57
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• 2002

This paper introduces an analysis method to predicting the flow characteristic of flow field around otter board In order to develope a high performance model. In this experiment, it is used a numerical analysis of flow field through CFD(Computational Fluid Dynamic), PIV method in which quantitative, qualitative evaluation is possible. In this experiment, it is used PIV method with flow filed image around otter board in order to analysis of flow characteristic. The result compared flow pattern with analysis result through CFD and also measurement result of lift and drag force coefficient carried out in CWC(Circulating Water Channel). The numerical analysis result is matched well with experiment result of PIV in the research and it is able to verify In the physical aspect. The result is as follows ; (1) It was carried out visibility experiment using laser light sheet, and picture analysis through PIV method in order to analysis fluid field of otter-board. As a result, the tendency of qualitative fluid movement only through the fluid particle's flow could be known. (2) Since PIV analysis result is quantitative, this can be seen in velocity vector distributions, instantaneous streamline contour, and average vorticity distributions through various post processing method. As a result, the change of flow field could be confirmed. (3) At angle of attack 24$^{\circ}$ where It Is shown maximum spreading force coefficient, the analysis result of CFD and PIV had very similar flow pattern. In both case, at the otter-board post edge a little boundary layer separation was seen, but, generally they had a good flow (4) As the result of post processing with velocity vector distributions, instantaneous streamline contour and average vorticity distributions by PIV, boundary layer separation phenomenon started to happen from angle of attack 24$^{\circ}$, and from over angle of attack 28$^{\circ}$, it happen at leading edge side with the width enlarged.

• Composites Research
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• v.37 no.3
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• pp.219-225
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• 2024

It is essential to develop a light-weight, high-performance structure for the deployable reflector antenna, which is the payload of a reconnaissance satellite, considering launch and orbital operation performance. Among them, the composite main reflector is a key component that constitutes a deployable reflector antenna. In particular, the development of a high-performance main reflector is required to acquire high-quality satellite images after agile attitude control maneuvers during satellite missions. To develop main reflector, the initial design of the main reflector was confirmed considering the structural performance according to the laminate stacking design and material properties of the composite main reflector that constitutes the deployable reflector antenna. Based on the initial design, four types of composite main reflectors were manufactured with the variable for manufacturing process. As variables for manufacturing process, the curing process of the composite structure, the application of adhesive film between the carbon fiber composite sheet and the honeycomb core, and the venting path inside the sandwich composite were selected. After manufacture main reflector, weight measurement, non-destructive testing(NDT), surface error measurement, and modal test were performed on the four types of main reflectors produced. By selecting a manufacturing process that does not apply adhesive film and includes venting path, for a composite main reflector with light weight and structural performance, we developed and verified a main reflector that can be applied to the SAR(Synthetic Aperture Rader) satellite.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.45 no.7
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• pp.539-549
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• 2017

In this paper, experimental studies on the shroud separation were performed to investigate characteristics of the shroud separation at mach 3. Shroud separation tests were carried out in the vertical free-jet wind tunnel that is capable of testing separable structures. A shroud model was miniaturized to meet test objectives and test section dimensions of the wind tunnel. Pneumatic Locking and separation mechanisms were designed considering external force due to free stream. High speed cameras were used to record the shroud motion and unsteady shock patterns over the deploying shrouds during the shroud separation process. Also, unsteady pressures on the nose surface were measured by using the pressure sensors. Through the tests, the measurement data necessary for researches on the shroud separation technology were obtained. Shroud separation behaviors and characteristics of unsteady pressure on the nose surface for each external flow conditions were analyzed.

• Journal of Space Technology and Applications
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• v.1 no.3
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• pp.364-374
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• 2021

This research discusses the change in radio frequency (RF) characteristics according to the number of Gores on the deployable mesh antennas for potential micro-satellite applications. The deployable type of lightweight mesh antenna can be used for various space missions such as communication/SAR/ SIGINT. In order to implement an ideal curvature of antenna surface, sufficient number of antenna rib structures are required. However, the increase in antenna ribs affects various design factors of the antenna system, especially total system mass, complexity of deployable mechanism and reliability. In this paper, the proper number of ribs for the mesh antenna were derived by comparison of electro-magnetic (EM) simulation results of example of antenna model in accordance with the various number of ribs.