• Journal of the Institute of Electronics Engineers of Korea SP
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• v.41 no.5
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• pp.99-109
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• 2004

This paper proposes a new method for tracking image contents, which are re-distributed on the Internet using a web-robot and fingerprinting scheme. The fingerprinting is an extended technique of watermarking and embeds identity of the customer into the content as a fingerprint in a way that is very difficult to erase. The fingerprint in the content can be used widely in the field of the copyright protection technique because it identifies the content itself and includes the information about the original customer. In this paper we discuss an active image tracking system using a web-robot and fingerprinting scheme. In the proposed system the information of the original customer is embedded as a fingerprint into the image content before distribution and also stored into DB. The distributed contents are collected by the web-robot and fingerprinting information is extracted from the contents. Finally the identifying of contents is done by comparing the extracted fingerprint with the selling history of the content.

• The KIPS Transactions:PartB
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• v.10B no.3
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• pp.257-264
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• 2003

In the context of a dynamic trading environment, the ultimate goal of the financial forecasting system is to optimize a specific trading objective. This paper proposes a two-phase (extraction and filtering) stock trading system that aims at maximizing the rates of returns. Extraction of stocks is performed by searching specific time-series patterns described by a combination of values of technical indicators. In the filtering phase, several rules are applied to the extracted sets of stocks to select stocks to be actually traded. The filtering rules are automatically induced from past data. From a large database of daily stock prices, the values of technical indicators are calculated. They are used to make the extraction patterns, and the distributions of the discretization intervals of the values are calculated for both positive and negative data sets. We assumed that the values in the intervals of distinctive distribution may contribute to the prediction of future trend of stocks, so the rules for filtering stocks are automatically induced from the data in those intervals. We show the rates of returns when using our trading system outperform the market average. These results mean rule induction method using distributional differences is useful.

• Korean Journal of Remote Sensing
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• v.9 no.2
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• pp.21-34
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• 1993

Digitalized topographic information is necessary for many areas such as landscape analysis, civil engineering planning and design, and geographic information systems. It can also be used in flight simulator and automatic navigation of unmanned plane if it is stored in computer in relevant format. Topographic information is coded with various symbols including contour lines, and is analyzed by trained personnels. The information should be stored in computer for automatic analysis, but it requires a lot of time and manpower to enter the contours using manual input devices such as digitizing tablet. This paper deals with automatic extraction and reconstruction of 3D topographic information from 2D terrain map. Several algorithms were developed in this work including contour segment finding algorithm and contour segment linking algorithm. The algorithm were tested using real 2D terrain map.

• Proceedings of the Korean Society for Information Management Conference
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• 1994.12a
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• pp.97-100
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• 1994

정보과학 분야에서 필요로 하는 의미해석 기술 개발에 중요한 역할을 하는 것이 시소러스이다. 정확한 관계 정의 및 대량정보 수용의 필요성은 시소러스 구축의 커다란 장애 요인이다. 시소러스 구축에은 다방면의 전문지식 활용과 막대한 비용 및 시간 투자가 요구된다. 기계적으로 관리 운영이 가능한 시소러스내의 관계는 BT, NT로 표현되는 계층관계와 USE, UF로 표현되는 등가관계로 이루어 진다. 본 연구는 개념적인 관계를 정의하는 두 관계를 기계적으로 추출하고, 기존의 평면적인 시소러스 구조를 실세계의 정보 구조에 적합하게 조직화하여 시소러스 구축에 있어서의 문제점을 개선하는데 그 목적이 있다. 제시되는 알고리즘은 단일 언어내의 시소러스 구축 뿐만 아니라, 구축된 시소러스들의 융합 및 다국어 시소러스 구축에도 적용된다.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10a
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• pp.547-549
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• 2003

본 논문에서 는 특정 도메인에서 사용되는 정보들과 그들의 관계를 정의해놓은 온톨로지를 반자동으로 구축하기 위하여 특정 도메인의 코퍼스에 있는 텍스트의 분석 결과를 이용하는 방안을 제시하고자 한다. 이를 위하여, 실험 도메인 내에서 빈번히 출현하는 전문용어들을 접미사와의 결합형태에 따라 추출하고 계층구조를 설정하는 알고리즘을 제안하고 약품매뉴얼을 대상으로 실험을 행하였다. 구축된 온톨로지는 자연스런 의미군을 형성하면서 풍부한 의미정보를 포함함으로써 정보검색 등의 전문적인 지식의 접근에 유용하게 쓰일 수 있으며, 검색의 성능을 향상시키기 위한 추론의 기반으로도 이용할 수 있다.

• Annual Conference of KIPS
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• 2009.11a
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• pp.713-714
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• 2009

유비쿼터스 컴퓨팅은 사람을 포함한 현실 공간에 존재하는 모든 대상물들을 기능적, 공간적으로 연결하여 사용자에게 필요한 정보나 서비스를 즉시에 제공하는 기반 기술이다. 이 논문에서는 사용자의 상황정보를 고려하기 위한 시공간 온톨로지를 구축하고, 사용자에게 최적의 서비스를 제공하기 위하여 자동으로 서비스 패턴을 추출하는 트리거 규칙 기반의 마이닝 시스템을 제안한다.

• Journal of the Korea Society of Computer and Information
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• v.5 no.2
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• pp.14-21
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• 2000

In the position of the users, it suggests the technology information space as a now paradigm, which supplement the function of science information DB. ICPIS which inputs described papers with keywords, offers the itemized summary of these contents, the visual indication and comparison of similar thesis. and it also supplises the abundant summary information, survey information, more than ten volumes of info communication thesis with starting the casual relation extraction for the users, playing a significant role in ICPIS is called KP, and it is package of domain knowledge that unifies the extraction and structure narration of the technology information. ICPIS extracts the technology information among the thesis that are deserved by the natual language treatment in the itemized KP described , and form the prescribed summary structure in KP.

• The Transactions of the Korea Information Processing Society
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• v.4 no.3
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• pp.871-879
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• 1997

The comversion of printed maps into computerixed data bases is an enormous rask. Thus the autmaotion of the conversion process is essential. Efficient computer representation of printed maps and line drawings depends on codes assigened to chracaters, symbools, and vestor representation of the graphics. In many cases, maps ard constructed in a number of layers, where each layer is printed in a distinct color, and it represents a subste of the map infromation. In order to properly repressnet road information from color map images, an automatic road extraction algorithm is proposed. Road image is separated from graghics by color segmentation, and then restored by the proposed concurrent conditional dilation operation. The internal and external noise of the road image is eliminated by opening and closing operation. By thining and vectorizing line segments, the desited road information is extracted.

• The Journal of the Acoustical Society of Korea
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• v.39 no.6
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• pp.549-558
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• 2020

In this paper, the method is discussed such that the robustness of automatic initiated narrowband target tracking is improved in passive sonar. In the case of automatic tracking initiation as target in passive sonar, due to a number of clutter, the clutter is initiated as target and tracked which prohibits the operation capability. The associated probability and information entropy of measurements, extracted from detection data, is calculated to keep going on automatic target initiation and tracking of true target, but reduce the automatic initiation and tracking of clutter. If the association probability and information entropy of the extracted measurements is satisfied for the predefined conditions, the procedure of automatic initiation begins. Using sea-trial data, simulations are executed and the results from the proposed method indicate that it keeps the automatic target initiation and tracking of true target and suppresses the automatic target initiation and tracking of clutters in contrary to the conventional method.

• Journal of the Korean Society for information Management
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• v.29 no.4
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• pp.191-208
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• 2012

Two fundamental aspects of speech summary generation are the extraction of key speech content and the style of presentation of the extracted speech synopses. We first investigated whether acoustic features (speaking rate, pitch pattern, and intensity) are equally important and, if not, which one can be effectively modeled to compute the significance of segments for lecture summarization. As a result, we found that the intensity (that is, difference between max DB and min DB) is the most efficient factor for speech summarization. We evaluated the intensity-based method of using the difference between max-DB and min-DB by comparing it to the keyword-based method in terms of which method produces better speech summaries and of how similar weight values assigned to segments by two methods are. Then, we investigated the way to present speech summaries to the viewers. As such, for speech summarization, we suggested how to extract key segments from a speech video efficiently using acoustic features and then present the extracted segments to the viewers.