• 한국컴퓨터그래픽스학회논문지
• /
• 제14권2호
• /
• pp.1-8
• /
• 2008

본 논문은 사용자가 카메라와 트래커가 부착된 HMD를 착용하고, 햅틱 장비를 사용하여 혼합현실 환경 상에서 기계적 상황훈련을 수행하는 시스템에 대하여 설명한다. 본 시스템은 발달장애인들의 시지각 협응능력 향상을 위해 도출된 기계적 상황훈련에 대한 시나리오를 기반으로 한다. 사용자는 HMD를 통해 보여 지는 가상의 핀을 햅틱으로 제어하여 작업판에 꽃는 상황훈련을 수행하고, 시스템은 FSM(Finite State Machine)기반으로 사용자의 행동에 맞는 피드백을 전달한다. 또한, 상황훈련에 대한 현실감을 높여 훈련 효과를 증대시키기 위해 가상 환경에 실제 사용자의 손을 삽입하고, 햅틱을 통해 촉감을 전달한다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2001년도 하계학술대회 논문집 A
• /
• pp.562-564
• /
• 2001

Current interior lighting design way that is consisting uniformly by designer's experience or simple capacity calculation diversifies according to standard of living elevation and there is problem that do not reflect been individualising resident's change request in lighting plan, design properly. Therefore, because this resident's request, enough judgment data that is worth reflecting dissatisfaction item in design concretely or standard is not saved up in business post, had gotten into bottleneck at lighting design. Diagnose resident's consciousness and feedback degree about interior lighting to existent apartment complex in this research and examined improvement plan. As a result, in the case of illumination, wanted higher brightness and showed reason that is most Affirmativ about order way of lighting fixtures. The reason is because can select registration nine that want by oneself directly. Plan qualitative elevation of house lighting environment making lighting image which is coincided in our real condition, and is thought to reflect various resident's character, fondness in design and solved dissatis faction.

• 제어로봇시스템학회논문지
• /
• 제21권11호
• /
• pp.1017-1026
• /
• 2015

Infrared (IR) target detection is one of the key technologies in Automatic Target Detection/Recognition (ATD/R) for military applications. However, IR sensors have limitations due to the weather sensitivity and atmospheric effects. In recent years, sensor information fusion study is an active research topic to overcome these limitations. SAR sensor is adopted to sensor fusion, because SAR is robust to various weather conditions. In this paper, a Boolean Map Visual Theory-Morphology (BMVT-M) method is proposed to detect targets in SAR and IR images. Moreover, we suggest the IR and SAR image registration and decision level fusion algorithm. The experimental results using OKTAL-SE synthetic images validate the feasibility of sensor fusion-based target detection.

• 한국컴퓨터그래픽스학회논문지
• /
• 제3권2호
• /
• pp.35-43
• /
• 1997

모니터 기반의 AR(Augmented Reality) 시스템에서 카메라를 이용하여 얻은 실사와 가상 객체를 정확하게 중첩하기 위해서는 카메라의 정확한 위치와 방향을 파악하는 것이 필요하다. 그러나, 트래커는 카메라와는 별도의 장비로 설치되므로, 트래커와 카메라간의 불일치에 의하여 오차가 발생된다. 본 논문에서는 카메라의 위치 및 방향을 유전자 알고리즘을 이용하여 검출한 다음, 카메라와 트래커간의 보정행렬을 구하여 실제 운용시 트래커에서 얻어진 값을 보정하여 실사와 가상 이미지를 중첩하는 방법을 제안한다. 제안된 방법은 복잡한 AR 시스템에서 카메라와 트래커간의 오차를 제거하는데 효율적이다.

• 한국산학기술학회논문지
• /
• 제12권12호
• /
• pp.5856-5864
• /
• 2011

본 논문은 도로상에 설치한 고정 카메라로부터 획득된 비디오 영상으로부터 이동물체를 검출하는 방법을 제안한다. 제안된 방법은 배경과 입력 비디오 프레임에서 가우시안 피라미드를 사용한 배경 차영상 기법에 기반하며, 입력 비디오 프레임과 배경영상의 오정합으로 발생하는 오검출을 줄이는데 화소기반 방법에 비해 효과적이다. 차영상에서 임계값을 효과적으로 결정하기위하여 각 프레임에서 Otsu의 방법으로 계산된 임계값에 스칼라 칼만필터를 적용하여 필터링하였다. 실험 결과 도로 비디오 영상에서 움직이는 물체를 효과적으로 검출함을 보였다.

• 대한원격탐사학회지
• /
• 제16권4호
• /
• pp.327-338
• /
• 2000

The forest conditions of North Korea has been a great concern since it was known to be closely related to many environmental problems of the disastrous flooding, soil erosion, and food shortage. To assess the long-term changes of forest area as well as the canopy conditions, several sources of multitemporal satellite data were applied to the study area near Kaesung. KOMPSAT-1 EOC data were overlaid with 1981 topographic map showing the boundaries of forest to assess the deforestation area. Delineation of the cleared forest was performed by both visual interpretation and unsupervised classification. For analyzing the change of forest canopy condition, multiple scenes of Landsat and SPOT data were selected. After preprocessing of the multitemporal satellite data, such as image registration and normalization, the normalized difference vegetation index (NDVI) was derived as a representation of forest canopy conditions. Although the panchromatic EOC data had radiometric limitation to classify diverse cover types, they can be effectively used t detect and delineate the deforested area. The results showed that a large portion of forest land has been cleared for the urban and agricultural uses during the last twenty years. It was also found that the canopy condition of remaining forests has not been improved for the last twenty years. It was also found that the canopy condition of remaining forests has not been improved for the last twenty years. Possible causes of the deforestation and the temporal pattern of canopy conditions are discussed.

• 대한원격탐사학회지
• /
• 제22권3호
• /
• pp.221-228
• /
• 2006

In this study, an integrated 3D modeling and rendering system dealing with 3D urban landscape features such as terrain, building, road and user-defined geometric ones was designed and implemented using $OPENGL\;{|}\;ES$ (Embedded System) API for mobile devices of PDA. In this system, the authoring functions are composed of several parts handling urban landscape features: vertex-based geometry modeling, editing and manipulating 3D landscape objects, generating geometrically complex type features with attributes for 3D objects, and texture mapping of complex types using image library. It is a kind of feature-based system, linked with 3D geo-based spatial feature attributes. As for the rendering process, some functions are provided: optimizing of integrated multiple 3D landscape objects, and rendering of texture-mapped 3D landscape objects. By the active-synchronized process among desktop system, OPENGL-based 3D visualization system, and mobile system, it is possible to transfer and disseminate 3D feature models through both systems. In this mobile 3D urban processing system, the main graphical user interface and core components is implemented under EVC 4.0 MFC and tested at PDA running on windows mobile and Pocket Pc. It is expected that the mobile 3D geo-spatial information systems supporting registration, modeling, and rendering functions can be effectively utilized for real time 3D urban planning and 3D mobile mapping on the site.

• 대한원격탐사학회지
• /
• 제10권2호
• /
• pp.121-132
• /
• 1994

A GIS based tactical terrain analysis system named ATTAS(Army Tactical Terrain Analysis Software) has been designed and implemented to support the field commanders for enhancing the capabiliy of their unit and efficiency of weapon system. This system is designed to provide computer graphics environment in which the analyst can interactively operate the entire analyzing process such as selecting the area of interest, performing analysis functions, simulating required battlefield operation and display the results. This system can be divided into three major sections; the terrain analysis modules, utilites, and graphic editor. The terrain analysis module inclused surface analysis, line of sight analysis, enemy disposition, 3D display, radar coverage, logistic route analysis, shortest path analysis, atmospheric phenomena prediction, automated IPB (Inteligence preparation of Battlefield), and other applied analysis. A combination of 2D and 3D computer graphics techniques using the X-window system with OSF/Motif in UNIX workstation was adopted as the user interface. The integration technique of remotely sensed images and GIS data such as precision registration, overlay, and on-line editing was developed and implemented. An efficient image and GIS data management technique was also developed and implemented using Oracle Database Management System.

• 한국전자통신학회논문지
• /
• 제16권5호
• /
• pp.1011-1018
• /
• 2021

시니어인구의 지속적 증가로 4차 산업혁명 응용기술이 보건복지 분야에 도입이 필요한 시점이다. 또한, 청년층 일손부족으로 노노케어 중심의 시니어 응급관리시스템이 구축되어 응급상황발생 시 시니어 동료가 응급구호 시설에 직접 통보하는 복지전달체계의 전략화가 필요하다. 본 논문에서는 시니어의 응급상황예측을 위해 스마트 앱을 통한 시니어 자가 학습으로 개별적 활동·비활동 정보를 수집분석하며, 시니어 동료가 스마트 폰 앱 메뉴를 통해 음성 및 이미지 등록정보로 응급상황을 예측하는 시니어 응급관리시스템을 설계한다.

• 대한원격탐사학회지
• /
• 제35권1호
• /
• pp.15-28
• /
• 2019

By applying the method of SAR interferometry to X-band synthetic aperture radar (SAR) image of COSMO-SkyMed, detailed motion patterns of five glaciers in the Parlung Zangbo River basin, Tibetan Plateau, in January 2010 have been derived. The results indicate that flow patterns are generally constrained by the valley geometry and terrain complexity. The maximum of $123.9ma^{-1}$ is observed on glacier No.1 and the minimum of $39.4ma^{-1}$ is found on glacier No.3. The mean values of five glaciers are between 22.9 and $98.2ma^{-1}$. Glaciers No.1, No.2, No.4 and No.5 exhibit high velocities in their upper sections with big slope and low velocities in the lower sections. A moraine lake accelerates the speed of mass exchange leading to a fast flow at the terminal of glacier No.3. These glaciers generally move along the direction of decreased elevation and present a macroscopic illustration of the motion from the northwest to the southeast. The accuracy of DEM and registration conditions of DEM-simulated terrain phases has certain effects on calculations of glacier flow direction and velocity. The error field is relatively fragmented in areas inconsistent with the main flow line of the glaciers, and the shape and uniformity of glacier are directly related to the continuous distribution of flow velocity errors.