• 한국정보통신설비학회:학술대회논문집
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• 한국정보통신설비학회 2007년도 학술대회
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• pp.386-389
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• 2007

TV technology started from black and white TV. Color TV invented and users request more realistic TV technology. The next technology is 3DTV. For 3DTV, 3D display technology, 3D coding technology, digital mux/demux technology in broadcast and 3D video acquisition are needed. Moreover, Almost every contents now exist are 2D contents. It causes necessity to convert from 2D to 3D. This article describes 2D/3D conversion algorithm and H/W platform on FPGA board. Time difference makes 3D effect and convolution filter increased the effect. Distorted image and original image give 3D effect. The algorithm is shown on 3D display. The display device shows 3D effect by parallax barrier method and has FPGA board.

• 한국국방경영분석학회지
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• 제3권2호
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• pp.49-77
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• 1977

Weapon systems are curcial instruments for the security of a nation and critical elements for the victory in a war. Since modern weapon systems tend to be capital-intensive with high precision and quality, they become more and more complex and diversified; their acquisition costs become huge; and their technological obsolescence becomes accelerated. Therefore, the systematic management of weapon acquisition process would be one of the most important defense tasks at the national level. To analyze such problems and find solutions, this paper has studied various aspects related to the efficient management of weapon system acquisition. After brief summarization of the general characteristics of weapon systems, their effectiveness, and developmental trend, the paper discusses the defense management policies and techniques for the weapon systems. Specifically, four alternative acquisition methods such as indigenous R & D, foreign purchase, co-production and joint-production are discussed and analyzed by systems approach. The systems analysis procedure to evaluate and select weapon acquisition method is as follows; 1) to analyze the merits and demerits of the alternative methods, 2) to screen unrealistic alternatives through the consideration of significant factors such as political, economic, military, technological, and social constraints, 3) to evaluate and select an optimal one among the remaining acquisition methods after the cost-effectivenss analysis. For the base of cost-effectivess analysis, cost analysis model as well as effectiveness analysis model of each acquisition method are developed.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2011년도 춘계학술대회 논문집
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• pp.99-100
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• 2011

• 지구물리와물리탐사
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• 제2권2호
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• pp.77-85
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• 1999

국내 대륙붕에서의 석유발견 가능성 제고를 위하여 탐해2호가 건조되었으며, 이를 이용하여 국내최초로 240 채널 2차원 해양 탄성파 탐사가 동해에서 이루어졌다. 탐해2호에는 2차원 및 3차원 탄성파 탐사를 위한 음원 및 수신장비, 기록장비 그리고 항측장비 등이 갖추어져 있고, 간단한 선상자료처리 시스템도 포함되어 있다. 음원은 4개의 소배열로 구성되어 있으며 각 소배열은 6개의 에어건으로 구성된다. 전체 음원 용량은 4578 $in^3$이다. 수신장비는 2조의 스트리머로 구성되며 각 조는 240 채널로 길이가 3 km이다. 탐사선 도입 후 처음 시도된 현장탐사에서 성공적인 2차원 탄성파 탐사 자료를 취득하였다. 전산처리를 통하여 자료취득 상태를 점검한 결과 양질의 탄성파 자료가 취득되었음을 확인할 수 있었다. 양질의 자료를 취득하기 위해서는 전체적인 탐사설계, 탐사장비 운용, 현장탐사시 탐사선의 항해, 체계적인 품질관리 등의 기술이 고루 갖추어져야 한다.

• Archives of Plastic Surgery
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• 제33권2호
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• pp.175-180
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• 2006

Preoperative angiography is frequently used in the planning of microsurgical reconstruction for identification of vascular abnormality that influence the planning of operation. But, recently 3D CT angiography is considered as new technique that can provide detailed information about vascular anatomy as well as soft and bony tissue without the risks of invasive angiography. 3D CT angiograms were performed in 19 patients before microsurgical reconstruction for the lower extremity and hand between May of 2003 and Oct of 2004. Sixteen of the studies were of the donor site and all of 19 studies were of the recipient site. No complications were found from the 3D CT angiograms. In one case of the bone exposed open wound, the injury of anterior tibial artery was identified and the zone of injury was adequately demonstrated. With the improvement in quality of CT imaging, 3D CT angiograms may provide a favorable alternative to invasive angiography. It is capable of providing high-resolution, three dimensional vascular imaging without the need for arterial puncture and prolonged post-procedure observation. The relation among blood vessels, bones, and soft tissue is well demonstrated in 3D CT angiogram. Also The acquisition time and examination cost were considerably lower in comparison with invasive angiography. In conclusion, this study demonstrates that 3D CT angiography may provide accurate, safe, and cost-effective preoperative imaging. The 3D CT angiography with relatively low morbidity, low cost, ease of image acquisition can have an broader role in microsurgical reconstructive surgery.

• 한국항행학회논문지
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• 제24권3호
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• pp.218-223
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• 2020

원격 측정 시스템의 신뢰성을 향상시키기 위해 실시간성을 보장하는 통신 방법 및 동기화된 여러 채널을 통한 일괄적인 계측을 수행하는 다양한 방법이 존재한다. 이러한 동기화된 시스템은 채널들의 동시계측 성능을 확인하기 위한 검증이 필요하다. 본 논문에서는 동시계측 성능 시험을 통해 원격 측정 시스템에서의 동기화된 채널 간 계측 시간의 차이를 측정하는 방법을 제안한다. 측정을 위해 모사 신호를 인가하고 채널의 샘플링 주기와 모사 신호의 주기의 차이를 시간 해상도라는 개념으로 정의하였다. 시간 해상도를 통해 채널 간의 계측 시차를 확인할 수 있는 원리를 설명한다. 또한 계측 시차가 발생할 수 있는 상황에서의 시뮬레이션을 통해 제안한 방법에 대한 검증을 진행하였다. 그리고 실제 원격 측정 시스템 내의 계측 시차를 식별하기 위한 절차가 기술된다.

• 한국기록관리학회:학술대회논문집
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• 한국기록관리학회 2019년도 춘계학술대회
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• pp.43-47
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• 2019

문화유산 분야에서 일찍이 문화유산을 보존 복원하기 위한 목적으로, 3차원(3D) 디지털 기술을 이용하여 문화유산의 원형을 기록하여 왔다. 하지만 문화유산 3차원(3D) 디지털 기록은 점군 데이터 취득부터 3차원(3D) 모델 제작까지 복잡한 단계를 거쳐 생산되는 대용량의 디지털 기록으로, 장기 보존 문제를 피할 수 없다. 국제적으로 관련 논의가 활발히 진행 중에 있으며, 국내외 선행연구와 사례 분석을 바탕으로 문화유산 3차원(3D) 디지털 기록의 보존 방향을 제언하고자 한다.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.674-675
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• 2015

A 3D indoor model becomes an indiscernible component of BIM (Building Information Modeling) and GIS (Geographic Information System). However, a huge amount of time and human resources are inevitable for collecting spatial measurements and creating such a 3D indoor model. Also, a varied forms of 3D indoor models exist depending on their purpose of use. Thus, in this study, three different 3D indoor models are defined as 1) omnidirectional images, 2) a 3D realistic model, and 3) 3D indoor as-built model. A series of reconstruction methods is then introduced to construct each type of 3D indoor models: they are an omnidirectional image acquisition method, a hybrid surveying method, and a terrestrial LiDAR-based method. The reconstruction methods are applied to a large and complex atrium, and their 3D modeling results are compared and analyzed.

• 전자공학회논문지SC
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• 제44권3호
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• pp.22-28
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• 2007

한국형 구축함용 전투체계의 추적레이더(STIR)는 탐색레이더(MW08)의 3차원 표적 정보에 지정되어 표적을 획득하고, 추적 알고리즘에 의해 자동추적하는 레이더로서 표적획득 시간 및 추적루프의 정확도로 레이더의 성능을 판단 할 수 있다. 함정 측면에서 보면 추적레이더의 표적획득 시간에 관계되는 요소들은 여러 가지가 있을 수 있다. 본 논문에서는 이런 요소들을 식별하고 성능향상방법을 제안함으로써 추적레이더의 표적획득 시간을 단축시켰다. 여기에서는 주요요소 세 가지에 대한 분석과 성능향상방향을 제시하였다. 첫째는 추적알고리즘을 분석하였으며, 두 번째는 획득거리에 관계되는 요소를 조정하는 파라미터의 적절성 분석하였고, 세 번째는 함기준 센서의 정확도를 분석하였다. 결과적으로 대함표적의 획득시간을 약 10초에서 3초로 성능을 향상시킬 수 있었다.

• 한국의류산업학회지
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• 제22권5호
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• pp.650-659
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• 2020

The present study provides reference data required for the design of clothing for the elderly by analyzing the body surface area during fitness motion based on 3D scan data of Korean elderly women. This study was conducted with the procedures of (1) survey of motions and main muscles for fitness, (2) acquisition of 3D scan data, and (3) analysis of rate of change for body surface area during fitness motion. Acquisition of 3D body scan data was obtained from seven elderly females (age: 64-77). We selected 66 anatomical landmarks (40 upper body and 22 lower body) by referring to previous studies. Body surface was segmented by connecting the landmarks marked on the 3D scan data acquired. Analysis of body surface area was conducted in terms of the change rate of surface area in 9 postures of elbow 0°, 90° and 180° for flexion, shoulder 90°, 180° for flexion, shoulder 0°, 180° for abduction, hip 90° for flexion, and knee 90° for flexion compared to the those in the standing posture. The amount of changes in body surface area were 12%-62% in the upper body, 15%-77% in the arm, and 10%-51% in the lower body. A future study on the rate of change of body surface length is needed; in addition, a study on how to apply the results of body surface area and body surface length analysis to clothing pattern design is also necessary.