스마트 디바이스를 위한 멀티터치 기반의 3D CAD 모델링

강윤아(Yuna Kang),김형기(Hyungki Kim),한순흥(Soonhung Han),히로마사스즈끼(Hiromasa Suzuki) 한국정보과학회 2012 한국정보과학회 학술발표논문집 Vol.39 No.2D

SEDRIS 합성 환경 데이터 가시화를 위한 변환기 개발

강윤아(Yuna Kang),김형기(Hyungki Kim),한순흥(Soonhung Han),김만규(Man Kyu Kim) (사)한국CDE학회 2013 한국CDE학회 논문집 Vol.18 No.3

The need for reusing synthetic environment data that are employed in the field of modeling and simulation has recently been rising. SEDRIS (Synthetic Environment Data Representation & Interchange Specification) is a standard to exchange synthetic environment data, and is the specification utilized in various military simulations of the Pentagon for representing and exchanging 3D data. SEDRIS represents environmental areas based on a data model; it can represent wind speed, wind directions, weather changes, the information of buildings, as well as terrain data. In some situations, however, the synthetic environment data stored in SEDRIS format should be converted to various visualization formats. First, because SEDRIS is a form of a super-set, it is necessary to verify whether large scale SEDRIS files are stored successfully through visualization. Second, the synthetic environment data should be visualized in some visualization programs for the simulation results to provide an immersive and realistic sense. In this study, we have developed converters for converting SEDRIS data to various visualization formats and visualized the converted results.

스마트 디바이스를 위한 3D 파라메트릭 CAD 시스템

강윤아(Yuna Kang),한순흥(Soonhung Han) (사)한국CDE학회 2014 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2014 No.2

A 3D CAD system that can be used on a smart device is proposed. Smart devices are now a part of everyday life and also are widely being used in various industry domains. The proposed 3D CAD system would allow modeling in a rapid and intuitive manner on a smart device when an engineer makes a 3D model of a product while moving in an engineering site. There are several obstacles to develop a 3D CAD system on a smart device such as low computing power and the small screen of smart devices, imprecise touch inputs, and transfer problems of created 3D models between PCs and smart devices. The author discusses the system design of a 3D CAD system on a smart device. The selection of the modeling operations, the assignment of touch gestures to these operations, and the construction of a geometric kernel for creating both meshes and a procedural CAD model are introduced. The proposed CAD system has been implemented for validation by user tests and to demonstrate case studies using test examples. Using the proposed system, it is possible to produce a 3D editable model swiftly and simply in a smart device environment to reduce design time of engineers.

토폴로지 인덱스 정보를 활용한 3차원 모델 갱신 데이터 축소 방법

강윤아(Yuna Kang) (사)한국CDE학회 2021 한국CDE학회 논문집 Vol.26 No.4

Recently, researches and developments on Network Centric Warfare(NCW) are getting activated along with the development of information and communication technology. In the defense field, it is possible to get information advantage in war by creating a network environment that can exchange battlefield data. To exchange battlefield data, Weapon Data Link(WDL) can be configured. It is possible to maintain target tracking performance by updating target data via WDL during the mission in the situation in which the target information has changed compared to the initial battlefield, unlike the ‘fire & forget’ method of the past. However, it is very inefficient to transmit the entire target data every time the target changes because the network resources available in WDL are limited. Therefore, this research proposes a method to update 3D target models with reduced data with topology index.

AR 마커를 이용한 스마트폰 인터페이스의 개선

강윤아(Yuna Kang),한순흥(Soonhung Han) (사)한국CDE학회 2011 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2011 No.1

As smartphones came into wide use recently, it has become increasingly popular not only among young people, but middle-aged people as well. Most smartphones use capacitive full touch screen, so touch commands are made by fingers unlike the PDAs in the past that use touch pens. In this case, a significant portion of the smartphone"s screen is blocked by the finger so it is impossible to see the screens around the finger touching the screen, and difficulty occurs in precise control used for small buttons such as qwerty keyboard. To solve this problem, this research proposes a method of using simple AR markers to improve the interface of smartphones. Sticker-form marker is attached to fingernails and placed in front of the smartphone camera. Then, the camera image of the marker is analyzed to determine the orientation of the marker to perceive as onRelease() or onPress() of the mouse depending on the marker"s angle of rotation, and use its position as the position of the mouse cursor. This method can enable click, double-click, drag-and-drop used in PCs as well as touch, slide, long-touch-input in smartphones. Through this research, smartphone inputs can be made more precise and simple, and show the possibility of the application of a new concept of smartphone interface.

다중 시스템 간의 CAD 협업을 위한 매크로 모델링 명령어의 사용

강윤아(Yuna Kang),한순흥(Soonhung Han) (사)한국CDE학회 2013 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2013 No.1

CAVE 네비게이션을 위한 스마트폰 인터페이스의 개발

강윤아(Yuna Kang),김형기(Hyungki Kim),한순흥(Soonhung Han) (사)한국CDE학회 2012 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2012 No.2

스마트 디바이스를 위한 3D 파라메트릭 CAD 시스템

강윤아(Yuna Kang),한순흥(Soonhung Han) (사)한국CDE학회 2014 한국CDE학회 논문집 Vol.19 No.2

A 3D CAD system that can be used on a smart device is proposed. Smart devices are now a part of everyday life and also are widely being used in various industry domains. The proposed 3D CAD system would allow modeling in a rapid and intuitive manner on a smart device when an engineer makes a 3D model of a product while moving in an engineering site. There are several obstacles to develop a 3D CAD system on a smart device such as low computing power and the small screen of smart devices, imprecise touch inputs, and transfer problems of created 3D models between PCs and smart devices. The author discusses the system design of a 3D CAD system on a smart device. The selection of the modeling operations, the assignment of touch gestures to these operations, and the construction of a geometric kernel for creating both meshes and a procedural CAD model are introduced. The proposed CAD system has been implemented for validation by user tests and to demonstrate case studies using test examples. Using the proposed system, it is possible to produce a 3D editable model swiftly and simply in a smart device environment to reduce design time of engineers.

AR 마커를 이용한 스마트폰 인터페이스의 개선

강윤아(Yuna Kang),한순흥(Soonhung Han) (사)한국CDE학회 2011 한국CDE학회 논문집 Vol.16 No.5

As smartphones came into wide use recently, it has become increasingly popular not only among young people, but middle-aged people as well. Most smartphones use capacitive full touch screen, so touch commands are made by fingers unlike the PDAs in the past that use touch pens. In this case, a significant portion of the smartphone"s screen is blocked by the finger so it is impossible to see the screens around the finger touching the screen, and difficulty occurs in precise control used for small buttons such as qwerty keyboard. To solve this problem, this research proposes a method of using simple AR markers to improve the interface of smartphones. Sticker-form marker is attached to fingernails and placed in front of the smartphone camera. Then, the camera image of the marker is analyzed to determine the orientation of the marker to perceive as onRelease() or onPress() of the mouse depending on the marker"s angle of rotation, and use its position as the position of the mouse cursor. This method can enable click, double-click, drag-and-drop used in PCs as well as touch, slide, long-touch-input in smartphones. Through this research, smartphone inputs can be made more precise and simple, and show the possibility of the application of a new concept of smartphone interface.

3차원 모델 형상과 원형공산오차를 고려한 목표점 자동 생성 기법

강윤아,Kang, Yuna 한국시뮬레이션학회 2019 한국시뮬레이션학회 논문지 Vol.28 No.2

본 연구는 비행체의 목표지와 진입방향이 정해졌을 때, 목표지점 3차원 모델의 형상과 비행체의 원형공산오차를 고려하여 최종 목표점을 자동으로 생성해 내는 기법에 대한 것이다. 기존에는 목표점을 사용자가 경험에 의존하여 선정하거나 단순히 중심으로 선정하는 경우가 많았고, 진입방향이 정해지기 전 선정하였기 때문에 최적의 위치를 선정할 수 없었다. 본 연구에서는 진입방향이 결정된 후 자동으로 목표점을 생성하여 이러한 문제들을 해결하고자 하였다. 기법은 크게 참조면 및 진입 후보점을 생성하는 단계, 각 진입 후보점의 점수를 계산하는 단계, 마지막으로 최종 목표점을 계산하는 총 3개의 단계로 이루어져 있으며, 본문에서는 각 단계에 대한 설명과 다양한 테스트케이스를 이용한 실험 결과를 기술한다. 본 연구를 통해 사용자는 비행체가 정상진입이 가능할 확률이 높은 목표점을 손쉽게 확인 및 적용 할 수 있다. This research proposes an automatic generation system of aimpoints with considering 3D target shapes and CEP(circular error probability) values after determining a target and an azimuth value. In the past, users decided aimpoints manually based on experience or just chose a middle point of the 3D model. Futhermore, it was not possible to select a proper position with consideration of azimuth because users should decide aimpoints before the azimuth value was determined. To solve this problem, this research provides a automatic system to compute proper aimpoints with 3D target shapes, azimuth values and CEP. This article contains the explanation of 3 steps for generating aimpoints automatically: first, generating a reference plane and candidate entry points, then computing scores of each entry points and finally determining an aimpoint from the entry point with the highest score. Users can easily determine a final aimpoint with high probability of success using this system.