• Title/Summary/Keyword: 내용 기반 특징

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An Ontology-based Annotation System for Semantic Web (시맨틱 웹에서 온토로지를 기반한 Annotation 시스템)

  • 강상구;양재영;최중민
    • Proceedings of the Korean Information Science Society Conference
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    • 2002.10d
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    • pp.298-300
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    • 2002
  • 시맨틱 웹은 인간이 이해하는 것처럼 웹 문서의 의미를 컴퓨터가 이해할 수 있도록 하는데 있다. 이를 위해 본 논문에서는 Annotation Editor를 사용하여 논문에 대한 RDF 메타데이타의 자동 생성 방법을 제안한다. 사용자가 논문을 주석 처리할 때, 문서에 대한 특징을 추출하고 온토로지 인터페이스를 사용하여 문서를 분류한다. 구현된 시스템을 통해 사용자는 추출된 메타데이타를 메타데이타 뷰를 통해 수정하고 RDF Store로 저장할 수 있으며, 주석 뷰를 통하여 수동으로 RDF 메타데이타를 입력할 수 있다. 본 논문은 검색 엔진을 통하여 논문 검색 시 전체 내용보다 RDF 메타데이타 정보만으로 효율적인 검색을 할 수 있는 방법에 초점을 둔다.

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NFC 시장 현황 및 활성화 방안 연구

  • Jo, Mi-Yeong;Kim, Gi-Cheon
    • Information and Communications Magazine
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    • v.29 no.6
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    • pp.58-66
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    • 2012
  • 최근 스마트폰 사업자와 통신사, 단말기 제조사 등의 사업자를 중심으로 모바일 서비스 시장을 선점하기 위한 연구들이 진행되고 있다. 스마트폰에서는 NFC(Near Field Communication) 기반의 모바일 결제 시스템에 대한 관심이 높아지고 있는데, 이는 양방향 데이터 전송이 가능하고, 보안기능을 제공하기 때문이다. NFC 관련 기술 및 서비스는 각 사업자들이 서비스 및 환경을 통해서 지원하며, 각 상호협력을 통해서 안내, 광고, 결제, 인증 등의 서비스를 제공하고 있다. 본고에서는 NFC의 주요 내용 및 특징에 대해서 살펴보고, 국내외 시장 현황 및 사업자별 개발 현황에 대해서 고찰한다. 그리고 이를 통해 NFC의 활성화를 위하여 고려해야 하는 사항에 대해서 논의한다.

Extraction of Highlight Scenes in Soccer Videos Using Statisical Threshold (통계적 임계값을 이용한 축구경기의 하이라이트 장면 검출)

  • 한지석;박기태;이종설;이석필;문영식
    • Proceedings of the Korean Information Science Society Conference
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    • 2003.10b
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    • pp.607-609
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    • 2003
  • 동영상 자동 분석은 비디오 데이터의 내용 기반 색인과 검색을 위한 첫 단계이다. 본 논문에서는 정형적인 구조를 가진 뉴스와는 달리 비정형적인 특성을 가진 축구 동영상에서 사용자의 관심이 되는 하이라이트 장면의 영상 특징을 이용하여 그 구조를 분석하여 하이라이트 장면을 검출하는 방법을 제안한다. 이전 연구를 토대로 그라운드영역과 골대 유무에 따라 하이라이트 후보 장면을 찾는 과정에서 경기마다 달라지는 임계값에 영향을 받지 않는 알고리즘을 제안하였다. 실험결과 제안된 방법이 여러 종류의 축구 경기 하이라이트 분석에 있어서 그 성능이 우수함을 확인할 수 있었다.

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Design of ALTIBASE^{TM}$ Storage Manager for High Performance and High Availability (고성능 고가용성을 위한 ALTIBASE^{TM}$ 자료저장 관리기의 설계)

  • 임화정;이규웅;정광철
    • Proceedings of the Korean Information Science Society Conference
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    • 2004.04b
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    • pp.196-198
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    • 2004
  • 기존 디스크 기반 데이터베이스 관리 시스템은 디스크를 주저장장치로 활용하는 특징적 환경 때문에 주기억 상주 데이터베이스 관리 시스템의 메모리 관리, 인덱스 관리, 자료저장관리 기능 등에 대한설계 및 구현 기술이 기본적으로 다르다. 본 논문에서는 현재 상용 시스템으로 사용되고 있는ALTIBASE$^{TM}$ 주기억 상주 DBMS의 설계 및 구현내용을 기술한다.

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Analysis and Design of Data-Encryption Platform Based on Android (안드로이드 기반 데이터 암호화 플랫폼 분석 및 설계)

  • Cho, Dae-Kyun;Yun, Sung-Yeol;Park, Seok-Cheon
    • Proceedings of the Korea Information Processing Society Conference
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    • 2012.04a
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    • pp.742-744
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    • 2012
  • 최근 모바일 보안에 많은 이슈가 되고 있고, 그 중 많은 사람들이 이용하는 안드로이드 어플리케이션에서도 악성 어플리케이션이 등장함에 따라 많은 개인정보 피해가 속출되고 있다. 이에 따라 안드로이드 어플리케이션의 데이터유형 별로 특징을 분석하고, 분석된 유형별로 사용할 수 있도록 암호화 알고리즘을 분석하며, 분석된 내용을 바탕으로 안드로이드에서 사용할 수 있도록 플랫폼의 형태로 설계하였다.

Design and Implementation of Content-based Video Database using an Integrated Video Indexing Method (통합된 비디오 인덱싱 방법을 이용한 내용기반 비디오 데이타베이스의 설계 및 구현)

  • Lee, Tae-Dong;Kim, Min-Koo
    • Journal of KIISE:Computing Practices and Letters
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    • v.7 no.6
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    • pp.661-683
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    • 2001
  • There is a rapid increase in the use of digital video information in recent years, it becomes more important to manage video databases efficiently. The development of high speed data network and digital techniques has emerged new multimedia applications such as internet broadcasting, Video On Demand(VOD) combined with video data processing and computer. Video database should be construct for searching fast, efficient video be extract the accurate feature information of video with more massive and more complex characteristics. Video database are essential differences between video databases and traditional databases. These differences lead to interesting new issues in searching of video, data modeling. So, cause us to consider new generation method of database, efficient retrieval method of video. In this paper, We propose the construction and generation method of the video database based on contents which is able to accumulate the meaningful structure of video and the prior production information. And by the proposed the construction and generation method of the video database implemented the video database which can produce the new contents for the internet broadcasting centralized on the video database. For this production, We proposed the video indexing method which integrates the annotation-based retrieval and the content-based retrieval in order to extract and retrieval the feature information of the video data using the relationship between the meaningful structure and the prior production information on the process of the video parsing and extracting the representative key frame. We can improve the performance of the video contents retrieval, because the integrated video indexing method is using the content-based metadata type represented in the low level of video and the annotation-based metadata type impressed in the high level which is difficult to extract the feature information of the video at he same time.

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A Object-Based Image Retrieval Using Feature Analysis and Fractal Dimension (특징 분석과 프랙탈 차원을 이용한 객체 기반 영상검색)

  • 이정봉;박장춘
    • Journal of Korea Multimedia Society
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    • v.7 no.2
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    • pp.173-186
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    • 2004
  • This paper proposed the content-based retrieval system as a method for performing image retrieval through the effective feature extraction of the object of significant meaning based on the characteristics of man's visual system. To allow the object region of interest to be primarily detected, the region, being comparatively large size, greatly different from the background color and located in the middle of the image, was judged as the major object with a meaning. To get the original features of the image, the cumulative sum of tile declination difference vector the segment of the object contour had and the signature of the bipartite object were extracted and used in the form of being applied to the rotation of the object and the change of the size after partition of the total length of the object contour of the image into the normalized segment. Starting with this form feature, it was possible to make a retrieval robust to any change in translation, rotation and scaling by combining information on the texture sample, color and eccentricity and measuring the degree of similarity. It responded less sensitively to the phenomenon of distortion of the object feature due to the partial change or damage of the region. Also, the method of imposing a different weight of similarity on the image feature based on the relationship of complexity between measured objects using the fractal dimension by the Boxing-Counting Dimension minimized the wrong retrieval and showed more efficient retrieval rate.

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Story-based Information Retrieval (스토리 기반의 정보 검색 연구)

  • You, Eun-Soon;Park, Seung-Bo
    • Journal of Intelligence and Information Systems
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    • v.19 no.4
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    • pp.81-96
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    • 2013
  • Video information retrieval has become a very important issue because of the explosive increase in video data from Web content development. Meanwhile, content-based video analysis using visual features has been the main source for video information retrieval and browsing. Content in video can be represented with content-based analysis techniques, which can extract various features from audio-visual data such as frames, shots, colors, texture, or shape. Moreover, similarity between videos can be measured through content-based analysis. However, a movie that is one of typical types of video data is organized by story as well as audio-visual data. This causes a semantic gap between significant information recognized by people and information resulting from content-based analysis, when content-based video analysis using only audio-visual data of low level is applied to information retrieval of movie. The reason for this semantic gap is that the story line for a movie is high level information, with relationships in the content that changes as the movie progresses. Information retrieval related to the story line of a movie cannot be executed by only content-based analysis techniques. A formal model is needed, which can determine relationships among movie contents, or track meaning changes, in order to accurately retrieve the story information. Recently, story-based video analysis techniques have emerged using a social network concept for story information retrieval. These approaches represent a story by using the relationships between characters in a movie, but these approaches have problems. First, they do not express dynamic changes in relationships between characters according to story development. Second, they miss profound information, such as emotions indicating the identities and psychological states of the characters. Emotion is essential to understanding a character's motivation, conflict, and resolution. Third, they do not take account of events and background that contribute to the story. As a result, this paper reviews the importance and weaknesses of previous video analysis methods ranging from content-based approaches to story analysis based on social network. Also, we suggest necessary elements, such as character, background, and events, based on narrative structures introduced in the literature. We extract characters' emotional words from the script of the movie Pretty Woman by using the hierarchical attribute of WordNet, which is an extensive English thesaurus. WordNet offers relationships between words (e.g., synonyms, hypernyms, hyponyms, antonyms). We present a method to visualize the emotional pattern of a character over time. Second, a character's inner nature must be predetermined in order to model a character arc that can depict the character's growth and development. To this end, we analyze the amount of the character's dialogue in the script and track the character's inner nature using social network concepts, such as in-degree (incoming links) and out-degree (outgoing links). Additionally, we propose a method that can track a character's inner nature by tracing indices such as degree, in-degree, and out-degree of the character network in a movie through its progression. Finally, the spatial background where characters meet and where events take place is an important element in the story. We take advantage of the movie script to extracting significant spatial background and suggest a scene map describing spatial arrangements and distances in the movie. Important places where main characters first meet or where they stay during long periods of time can be extracted through this scene map. In view of the aforementioned three elements (character, event, background), we extract a variety of information related to the story and evaluate the performance of the proposed method. We can track story information extracted over time and detect a change in the character's emotion or inner nature, spatial movement, and conflicts and resolutions in the story.

Musician Search in Time-Series Pattern Index Files using Features of Audio (오디오 특징계수를 이용한 시계열 패턴 인덱스 화일의 뮤지션 검색 기법)

  • Kim, Young-In
    • Journal of the Korea Society of Computer and Information
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    • v.11 no.5 s.43
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    • pp.69-74
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    • 2006
  • The recent development of multimedia content-based retrieval technologies brings great attention of musician retrieval using features of a digital audio data among music information retrieval technologies. But the indexing techniques for music databases have not been studied completely. In this paper, we present a musician retrieval technique for audio features using the space split methods in the time-series pattern index file. We use features of audio to retrieve the musician and a time-series pattern index file to search the candidate musicians. Experimental results show that the time-series pattern index file using the rotational split method is efficient for musician retrievals in the time-series pattern files.

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Patent Image Retrieval Using SURF Direction histograms (SURF 방향 히스토그램을 이용한 특허 영상 검색)

  • Yoo, Ju-Hee;Lee, Kyoung-Mi
    • Journal of KIISE
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    • v.42 no.1
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    • pp.33-43
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    • 2015
  • Recently, patent images are growing importance and thus patent image retrieval is a growing area of research. However, most existing patent image retrieval systems use edges extracted in the images, whose performance is affected by the quality of edge detection in the image pre-processing step. To overcome this disadvantage, we propose a SURF-based patent image retrieval method which uses the morphological characteristics of the images. The proposed method detects SURF interest points with directions and computes regional histograms. We apply the proposed method to a patent image database with 2000 binary images and we show the proposed retrieval system achieves excellent results, even when the images have some loss or degradation.