• 조명전기설비학회논문지
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• 제20권9호
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• pp.45-53
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• 2006

This paper proposes a method for an effective intelligent route decision for automatic moving robots(AMR) using a 2D spatial map of a stereo camera system. In this method, information about depth and disparity map are detected in the inputting images of a parallel stereo camera. The distance between the automatic moving robot and the obstacle is detected, and a 2D spatial map is obtained from the location coordinates. Then the relative distances between the obstacle and other objects are deduced. The robot move automatically by effective and intelligent route decision using the obtained 2D spatial map. From experiments on robot driving with 240 frames of stereo images, it was found that the error ratio of the calculated distance to the measured distance between objects was very low, 1.52[%] on average.

• International Journal of Internet, Broadcasting and Communication
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• 제8권4호
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• pp.54-57
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• 2016

In this paper, the method for an effective and intelligent route decision of the automatic ground vehicle (AGV) using a 2D spatial map of the stereo camera system is proposed. The depth information and disparity map are detected in the inputting images of a parallel stereo camera. The distance between the automatic moving robot and the obstacle detected and the 2D spatial map obtained from the location coordinates, and then the relative distance between the obstacle and the other objects obtained from them. The AGV moves automatically by effective and intelligent route decision using the obtained 2D spatial map. From some experiments on robot driving with 480 frames of the stereo images, it is analyzed that error ratio between the calculated and measured values of the distance between the objects is found to be very low value of 1.57% on average, respectably.

• 한국생산제조학회지
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• 제20권2호
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• pp.133-138
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• 2011

RFID system can be used to improve object recognition, map building and localization for robot area. A novel method of indoor navigation system for a mobile robot is proposed using RFID technology. The mobile robot With a RFID reader and antenna is able to find what obstacles are located where in circumstance and can build the map similar to indoor circumstance by combining RFID information and distance data obtained from sensors. Using the map obtained, the mobile robot can avoid obstacles and finally reach the desired goal by $A^*$ algorithm. 3D map which has the advantage of robot navigation and manipulation is able to be built using z dimension of products. The proposed robot navigation system is proved to apply for SLAM and path planning in unknown circumstance through numerous experiments.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.911-913
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• 2003

Recently in order to process forest official task more effectively and scientifically the previous of that which is focused on document and inventory, should be applied with the spatial information technology. Especially, the forest information remote sensing system has to be developed using digital photogrammetry and GIS. In this study the forest information remote sensing system is implemented to manage forest resource and forest official effectively especially by constructing database of forest environment information and cadastral information, overlaying various thematic maps, and performing spatial analysis using GIS and aerial photograph. For this, the attribute data and spatial data of aerial photograph, digital topography map, forest cadastral map, forest type map, forest use map should be reprocessed and stored in Oracle. Also, the user interface is developed by using Visual Basic 6.0 and MapObjects 2.1 of ESRI based on CBD(Component Based Development).

• 한국인터넷방송통신학회논문지
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• 제18권6호
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• pp.11-19
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• 2018

최근 GIS(Geographic Information System)을 중심으로 다양한 정보를 지도위에 제공하고 있으며, 대표적으로 국외의 경우 구글맵, 오픈스트리트맵, 빙맵 등이 있고, 국내의 경우 네이버지도, 다음지도, 브이월드맵 등이 GIS 기술의 한 부분인 WMS(Web Map Service)를 이용하여 서비스를 제공하고 있다. 본 논문에서는 현재 서비스되고 있는 벡터장 데이터 정보를 이용하여, 조류의 흐름도 와 스트림라인의 표출 방안 알고리즘 연구 및 사용자 편의성을 고려한 해양예측모델 데이터의 가시화 방안에 대해 연구를 수행하였다. 기존의 조류 흐름도 표출 및 스트림라인 표출 알고리즘과 제안하는 방식의 성능을 비교를 하여, 기존의 기술 보다 2배 이상 빠른 표출이 되는 것을 확인하였다.

• 디지털콘텐츠학회 논문지
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• 제12권4호
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• pp.559-565
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• 2011

본 논문에서는 MMORPG와 같은 게임에서 대규모의 사용자 처리를 유연하게 할 수 있는 블록 기법을 이용한 분산 형 게임서버구조를 제안하였다. 제안된 분산 형 구조에서의 게임서버들은 각 맵(map)을 담당하는 존(zone)이라는 형태로 그룹화 되며 각 존 내의 서버들은 각 존에 할당된 게임 맵을 여러 개 일정크기의 블록으로 나누어 각 블록들을 게임 서버의 성능에 따라 적절하게 분배하여 처리한다. 제안된 블록 기법을 도입한 분산 형 게임 서버 구조는 게임서버와 통신서버에서의 블록처리 방식을 통해 게임배경의 추가/삭제를 용이하게 할 수 있어 대규모의 사용자를 수용할 수 있음은 물론 추후 사용자가 직접 만드는 배경도 기존 게임 배경에 연동될 수 있도록 하였다. 일정한 블록으로 나눈 게임배경을 서버의 성능이나 처리하는 캐릭터의 수에 따른 부하를 동적으로 배분하여 시스템의 효율성을 증가시키고 안정성을 높였다.

• 한국전자파학회논문지
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• 제24권4호
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• pp.417-425
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• 2013

디지털 통신 기술은 보다 높은 데이터 효율과 정보의 효율적인 부호화에 초점을 맞추고 있다. 또한, 보안성을 높이고 외부 요인의 간섭을 최소화하는 것이 중요하다. DCSK(Differential Chaos Shift Keying)나 CDSK(Correlation Delay Shift Keying)와 같은 비선형 시스템에서는 정보를 효율적으로 부호화하여 보안성을 높이고 외부 요인의 간섭을 최소화시키는 방법으로 카오스 통신 시스템을 많이 사용하고 있다. 본 논문에서는 DCSK 방식과 CDSK 방식에 카오스 맵을 적용하여 카오스 통신 시스템의 BER 성능과 정보의 항재밍 특성을 평가한다. 시뮬레이션을 통해 Gauss iterated map이 다른 3개의 카오스 맵보다 좋은 성능을 얻을 수 있다는 것을 알 수 있다. 또한, DCSK 방식과 CDSK 방식은 카오스 맵을 적용함으로써 더 좋은 항재밍 특성을 얻을 수 있다.

• 한국GIS학회:학술대회논문집
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• 한국GIS학회 1998년도 추계학술대회 발표요약문
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• pp.34-36
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• 1998

In Korea, the initial installation of GIS requires lots of cost, time, and human efforts, If the accuracy of GIS data does not meet the certain standard for use, the system may not work as expected. So, it needs to be investigated for the accuracy of raw data. However, there is little study for the accuracy of raw data in Korea. Therefore, the purpose of this study is to review the data accuracy of raw data - geologic map, 1:5,000 and 1:25,000 scale topographic map, forest stand map, degree of green naturality(DGN) map, and detailed survey data of DGN map - for fulfilling the expected use in Korea. After this study, some errors in data were surveyed and following conclusions were derived. (1) There is a lack of data, e. g, wildlife habitat map. (2) Some data are misinterpreted depending on the location in the geologic map. (3) Some data are not updated after change of topography in the topographic map. (4) Some data are not edited properly in the forest stand map. (4) DGN classification system does not reflect the characteristic of Korean vegetation community. So, it needs to be refined and restructured.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.458-459
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• 2009

This global case study pursues diversification and intensification for an application system of the national wind map which has been developed to support national strategy building and promotion of wind energy dissemination. We chose nine counties' national wind maps and compared their map area, extraction height, temporal and spatial resolution, download services, etc. to derive a best practice for the Korea wind map application system. Therefore, the application system are designed to offer high resolution height information of which covers wind turbine rotor sweeping area and time-series dataset which can be downloaded for further analysis by users. It is anticipated that the system would contribute greatly to wind energy policy, business and research sectors once the derived ideas have been implemented to the application system

• Journal of Multimedia Information System
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• 제4권4호
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• pp.249-254
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• 2017

Digital vector maps must be compressed effectively for transmission or storage in Web GIS (geographic information system) and mobile GIS applications. This paper presents a polyline compression method that consists of polyline feature-based hybrid simplification and second derivative-based data compression. Experimental results verify that our method has higher simplification and compression efficiency than conventional methods and produces good quality compressed maps.