• Journal of Korea Spatial Information System Society
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• v.6 no.1 s.11
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• pp.59-71
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• 2004

Nearest neighbor query retrieves nearest located target objects, and is very frequently used in mobile environment. In this paper we propose a novel neatest neighbor query processing technique that is able to retrieve nearest located target object from the user who is continuously moving with a direction. The proposed method retrieves objects using the direction property of moving object as well as euclidean distance to target object. The proposed method is applicable to traffic information system, travel information system, and location-based recommendation system which require retrieving nearest located object.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.2 no.1
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• pp.23-28
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• 2009

Recently, the research which concerns the object class recognition has been done. Although an object tracking based on most of histograms employs a colored model to improve robustness, the system is not reliable enough yet. In this paper, we presents a method to express and track an object by using the histograms which are composed with visual features through succesive frames. The experimental results shows that this method is reliable to track a car within 80m distance from camera.

• The Transactions of the Korea Information Processing Society
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• v.7 no.8S
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• pp.2688-2699
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• 2000

본 논문에서는 시간속성과 능동특성을 지원하는 관리객체의 동적특성 표현언어 BDL(Behaviour Description Language)을 이용하여 시스템 망관리 모델의 관리기능을 정형적으로 표현하였다. 그리고 BDL로 표현된 관리기능을 CORBA IDL로 변환하는 BDL＿to＿IDL 컴파일러를 설계·구현하였다. 특히, 망 관리 정보베이스에 저장되어있는 관리객체를 안전하게 보호하기 위해 ITU-T 권고안에 정의된 강제적 접근제어 모델과 역할기반 접근제어 모델을 상호연동한 접근제어모델을 정의하였다. 또한, 관리속성값을 제어하는 관리연산을 연관된 유형별로 묶어 역할로 정의하고 관리자와 관리객체에 인가등급과 보안등급을 부여하여 역할배정규칙과 제약조건에 따라 관리정보의 접근을 제어함으로써 보다 무결성을 보장받도록 하였다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.3C
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• pp.274-278
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• 2009

Recently, the research which concerns the object class recognition has been done. Although an object tracking based on most of histograms employs a colored model to improve robustness, the system is not reliable enough yet. In this paper, we presents a method to express and track an object by using the histograms which are composed with visual features through successive frames. The experimental results shows that this method is reliable to track a car within 80m distance from camera.

• Journal of Korea Society of Industrial Information Systems
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• v.6 no.2
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• pp.54-62
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• 2001

In this paper, we proposed multimedia based ExamBank system in web environments. In the proposed system the database was designed based on the object-relation model and the application program was implemented with Java such that independent execution would be possible to guarantee no fault for multi-client in Web environments. We defined the Exam entities as objects, and implemented those inter-relationships as user definition and type. In addition, by mapping the schema object of DBMS and JAVA class, it becomes to possible transferring the object systematically between DHMS and JAVA application server.

• The KIPS Transactions:PartD
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• v.11D no.2
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• pp.317-324
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• 2004

Containment queries for XML documents is one of the most important query types, and thus the efficient support for this type of query is crucial for XML databases. Recently, object-relational database management system (ORDBMS) vendors try to store and retrieve XML data in their products. In this paper, we propose an extensible index to support containment queries over the XML data stored as BLOB type in ORDBMSs. That is, we describe how to implement the index using the extensibility feature of an ORDBMS, and describe its usage.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.10a
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• pp.903-906
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• 2018

본 논문에서는 동적 프로젝션 매핑 콘텐츠 저작 도구의 설계를 위해 동적 프로젝션 매핑의 유형과 그에 따른 인터렉션, 이펙트 효과, 그리고 적용되고 있는 객체 추적 방법을 분석하였다. 움직임이나 형태가 고정된 대상체에 영상을 투영하던 정적 프로젝션 매칭의 방법과는 다르게 최근 소개되고 있는 동적 프로젝션 매핑 콘텐츠들은 다양한 객체 추적 방법을 적용하여 프로젝션 매핑의 적용 대상 및 내용이 다양화되고 있다. 그러나 이에 따른 동적 프로젝션 매핑 콘텐츠 저작도구의 개발이 요구되고 있다. 이에 향우 저작도구의 설계를 위한 사전연구로 동적 프로젝션 매핑 콘텐츠의 특성을 분석하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.474-477
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• 2013

본 논문에서는 모바일 AR 프로그래밍에 대한 지식이 없는 사용자가 쉽게 모바일 AR 콘텐츠 제작을 할 수 있도록 하기 위하여 마커와 가상모델 그리고 인터랙션의 형태와 가상모델의 반응형태를 인터랙티브하게 연결하는 인터랙티브 모바일 AR 콘텐츠 빌더 프로토타입을 설계 및 구현하였다. 우선, 모바일 AR 콘텐츠에서 인터랙션과 반응형태를 분석하기 위하여, 시중에 유통되고 있는 AR 앱들을 수집하여 앱의 특성에 따라 유형을 분류하고, 유형별 사용되는 인터랙션의 종류 및 반응형태를 조사하였다. 조사내용을 바탕으로 사용되는 모바일 AR 콘텐츠 빌더에 포함시킬 인터랙션의 종류 및 반응형태의 메뉴항목들을 설계하였고, 단위 AR 객체를 정의하기 위한 클래스와 이를 저장할 데이터베이스 테이블을 설계하였다. 또한, 정의된 단위 AR 객체의 내용을 다른 응용 프로그램들에서 쉽게 읽고, 가시화 시킬 수 있는 모바일 AR 가시화 클래스를 포함한 모바일 AR 콘텐츠 빌더 프로토타입을 구현하였다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2022.04a
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• pp.127-128
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• 2022

The construction industry has a higher disaster rate than other industries, so safety education and management are highly important. In order to reduce the construction accident rate, it is necessary to study the key safety management factors reflecting the characteristics of the construction industry, where there are differences in processes and manpower input for each process, and a small number of managers. Therefore, in this study, key safety management factors for each Process of construction were derived through cross-analysis between safety accident types and accident occurrence objects through disaster case data. The extracted key safety management factors are expected to provide useful information for safety education and supervision of construction sites.

• Journal of Broadcast Engineering
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• v.5 no.1
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• pp.41-49
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• 2000

In this paper, we propose a new method of indexing and searching based on object-specific features at different semantic levels for video retrieval. A moving trajectory model is used as an indexing key for accessing the individual object in the semantic level. By tracking individual objects with segmented data, we can generate motion trajectories and set model parameters using polynomial curve fitting. The proposed searching scheme supports various types of queries including query by example, query by sketch, and query on weighting parameters for event-based video retrieval. When retrieving the interested video clip, the system returns the best matching event in the similarity order.