• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.42 no.3
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• pp.263-269
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• 2014

Flight test data visualization functions can improve an understanding of flight test results, test procedures, and the performance of a flight vehicle after flight tests. FlyingView was developed for researchers to analyse flight test data in a 3D virtual environment. It also can display X-Y plots using flight test data. It was developed and applied to flight tests of an air-to-ground weapon system of ADD. This paper describes the capabilities of FlyingView.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.1
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• pp.25-32
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• 2014

Petroglyphs is an essential part of the worldwide cultural heritage since it plays a key role for the comprehension of prehistoric communities previous to writing. nowadays 3D data are a critical component to permanently record the form of important cultural heritage so that they might be passed down to future generations. Recent 3D scanning technologies allow the generation of very realistic 3D model that can be used for multimedia museum exhibitions to attract the users into the 3D world. In this paper, we develop the 3D petroglyph VR contents based on a novel gesture recognition method. The proposed gesture recognition method can recognizes the movements of the user using 3D depth sensor by comparing with the pre-defined movements. Also this paper presents new approaches for 3D petroglyphs data recording using 3D scanning technology as accurate and non-destructive tools.

• Broadcasting and Media Magazine
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• v.26 no.4
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• pp.40-47
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• 2021

디지털 트윈, 메타버스 등의 시대적 흐름에 대응하기 위해, 1)실사와 같은 실감성을 갖추고, 2)데이터 취득이 용이하며, 3)가벼운 데이터 저장 및 활용이 가능한 실내 공간 모델링의 필요성이 증대되고 있다. 본 기고에서는 상기 세 가지 조건을 만족하는 TeeVR이라는 기술에 대해 소개하고, 기술의 혁신을 가능하게 한 "구조 기반 접근법"에 대해 소개한다. 마지막으로 아파트에서 전시홀에 이르는 scalable한 적용 예시와 웹(web)이나 스마트 폰과 같은 제한된 환경에서도 사용자 만족도가 높은 다양한 응용 예시를 설명한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.04a
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• pp.845-847
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• 2015

선교에서 항해자는 견시를 통해 선박의 주위 상황을 인지하고, RADAR나 ECDIS와 갈은 항해 장비의 정보를 동시에 파악하면서 운항해야한다. 이렇게 복잡한 정보 제공 환경에서는 상황 인지에 대한 인적과실이 발생할 가능성이 크기 때문에 보다 효율적인 항행정보 제공 기술이 필요하다. 본 연구에서는 항해장비가 제공하는 다양한 정보들을 외부 영상에 중첩하여 전시할 수 있는 증강현실 기반 항해지원 시스템의 항행정보 정함 기술을 개방하고, 이를 선박운항 시뮬레이터 환경에서 검증하는 연구를 수행 하였다. 본 시스템은 항해장비로부터 항행정보를 획득한 후, 이 정보를 카메라를 통해 입력되는 영상과 중첩하여 항해사에게 제공하며, 효과적인 중첩처리를 위하여 상용 그래픽스 엔진인 Unity3D를 사용 하였다. 또한, 시뮬레이터 실험 결과 선박의 움직임에도 정확하게 정합되는 것을 확인하였으며, 개발원 기술은 향후 실제 선교환경에서 활용될 수 있는 증강현실 기반의 항행정보 지원 시스템에 활용될 수 있을 것으로 기대한다.

• The KIPS Transactions:PartD
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• v.11D no.6
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• pp.1259-1268
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• 2004

To organize training in limited training area for an actuai combat, realistic training simulation plugged in by various battle conditions is essential. In this paper, we propose a virtual target overlay technique which does not use a virtual image, but Projects a virtual target on ground-based CCD image by appointed scenario for a realistic training simulation. In the proposed method, we create a realistic 3D model (for an instructor) by using high resolution Geographic Tag Image File Format(GeoTIFF) satellite image and Digital Terrain Elevation Data (DTED), and extract the road area from a given CCD image (for both an instructor and a trainee). Satellite images and ground-based sensor images have many differences in observation position, resolution, and scale, thus yielding many difficulties in feature-based matching. Hence, we propose a moving synchronization technique that projects the target on the sensor image according to the marked moving path on 3D satellite image by applying Thin-Plate Spline(TPS) interpolation function, which is an image warping function, on the two given sets of corresponding control point pair. To show the experimental result of the proposed method, we employed two Pentium4 1.8MHz personal computer systems equipped with 512MBs of RAM, and the satellite and sensor images of Daejoen area are also been utilized. The experimental result revealed the effective-ness of proposed algorithm.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.49 no.2
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• pp.13-19
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• 2012

The techniques of 3d image processing have broadly used in the areas including movies, games, performances, exhibitions. In addition, increasing demands for practical uses have gradually extended to the areas of architecture, medicine, nuclear power plant. However, dominant techniques for 3d image processing seem to depend on multi-camera in which two stereo images are merged into one image. Also the pipeline has limitations to provide real-time 3d viewer in ubiquitous computing. It is not able to be applicable onto most general screens as well. In addition, the techniques can be utilized for the real-time 3d game play without a particular monitor or convertor. Hence, the research presented here is to aim at developing an efficient real-time 3d viewer using only mono camera which do not need post processing for editing as well.

• Journal of the Korea Computer Graphics Society
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• v.29 no.3
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• pp.1-12
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• 2023

Software tools for manual 3D projection mapping have been widely used in theme parks and exhibitions. However, no research has been conducted on detailed utilization methods and usability of those tools yet. This study organizes the entire process of manual 3D projection mapping step by step and analyzes the problems that occurred at each step to identify potential improvements of 3D projection mapping tools. First, we introduce the process, which includes: two methods for creating virtual-physical object pairs to construct a virtual environment that is identical to the real-world target of the 3D projection mapping, the production of video textures for special effects, and mapping methods that use semi-automatic projector calibration. In addition, through experiments comparing and analyzing two widely used tools under various conditions for 3D mapping, we identified the technical limitations, performance differences between tools, and issues that impede usability. Finally, we suggest improvements and future research directions to enhance the usability of the 3D projection mapping technology.

• Cartoon and Animation Studies
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• s.34
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• pp.105-128
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• 2014

This study was aimed to analyze the disparities of 3D stereoscopic images in four well-known American animation movies. After Avatar (2009), lots of stereoscopic movies were developed in Korean 3D production. Almost all 3D productions in Korea, however, focus on the display images or TV series animation yet. In order to make many well-made Korean stereoscopic 3D animations in future, analyzing and comparing the disparities of 3D stereoscopic images is necessary and even mandated. First, I chose 40 cuts from each four American stereoscopic 3D feature films, including Despicable me 2, Epic, Monster University, and Turbo. According to the classifications of shot angles by Vineyard (2008), secondly I analyze the 23 different angular disparities of 3D stereoscopic images and displayed in tables. Demonstrated shot angle disparities in each scene would provide numerical information to animators how to design and make the 3D stereoscopic images. Making successful stereoscopic 3D feature film will be a huge turning point in the Korean animation field in future. This study would be a first trial to seek a new method to set ahead an outlook of numerical values of 3D stereoscopic images for better visual effects.

• Proceedings of the KIEE Conference
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• 2007.10c
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• pp.207-208
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• 2007

높은 효율의 태양전지의 개발은 태양전지 상용화에 꼭 필요한 일이다. 고효율 태양전지 개발을 위해 태양전시 시뮬레이션 프로그램인 PC1D를 이용하여 현재 많이 사용되고 있는 p-n 접합형 실리콘 태양전지의 변환효율에 영향을 주는 요소들, 특히 웨이퍼 표면의 texturing과 doping 농도를 변화시켜 최적의 요건을 찾고자하였다. texture depth = 3um, texture angle=$80^{\circ}$, base의 비저항=$0.1{\ell}{\cdot}cm$, emitter doping 농도=$5e+18cm^{-3}$에서 20.37%의 고효율을 얻을 수 있다.

• Cartoon and Animation Studies
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• s.48
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• pp.199-215
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• 2017

Recently, a drone is used for the general purpose application although the drone was builtfor the military purpose. A drone is actively used for the creation of contents, and an image acquisition. In this paper, we develop a 3D library module platform using 3D mesh model data, which is generated by a drone image and its point cloud. First, a lot of 2D image data are taken by a drone, and a point cloud data is generated from 2D drone images. A 3D mesh data is acquired from point cloud data. Then, we develop a service library platform using a transformed 3D data for multi-purpose uses. Our platform with 3D data can minimize the cost and time of contents creation for special effects during the production of a movie, drama, or documentary. Our platform can contribute the creation of experts for the digital contents production in the field of a realistic media, a special image, and exhibitions.