• 제목/요약/키워드: 능동적 형태모델

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Lip Contour Extraction Using Active Shape Model Based on Energy Minimization (에너지 최소화 기반 능동형태 모델을 이용한 입술 윤곽선 추출)

  • Jang, Kyung-Shik
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.10
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    • pp.1891-1896
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    • 2006
  • In this paper, we propose an improved Active Shape Model for extracting lip contour. Lip deformation is modeled by a statistically deformable model based Active Shape Model. Because each point is moved independently using local profile information in Active Shape Model, many error may happen. To use a global information, we define an energy function similar to an energy function in Active Contour Model, and points are moved to positions at which the total energy is minimized. The experiments have been performed for many lip images of Tulip 1 database, and show that our method extracts lip shape than a traditional ASM more exactly.

The Pupil Motion Tracking Based on Active Shape Model Using Feature Weight Vector (특징 가중치 벡터를 적용한 능동 형태 모델 기반의 눈동자 움직임 추적)

  • Kim, Soon-Beak;Lee, Soo-Heum
    • Proceedings of the Korea Institute of Convergence Signal Processing
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    • 2005.11a
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    • pp.205-208
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    • 2005
  • 본 논문은 특징 가중치 벡터를 적용하여 능동형태 모델(Active Shape Model)기반에서 눈동자의 움직임 추적 속도를 향상시키는 방법을 제안한다. 일반적인 능동형태 모델에서는 객체 추적을 위한 PDM 구성을 위해 각 특징점 구성 벡터의 유클리디안 거리의 최소 값으로 Training Set정렬 과정을 수행한다. 이 과정에서 적절하지 못한 샘플 영상으로 인해 안정된 PDM을 구성하지 못하는 문제점이 발생한다. 이러한 문제점을 해결하기 위하여 본 논문에 서는 형태를 구성하는 특징점마다 가중치를 부여하는 벡터를 작성하고, 최소자승근사법으로 최유사 특징점 벡터를 산출하기 위한 선형방정식을 구상하였다. 이로 인해 안정된 PDM을 구성할 수 있었으며, 눈동자 추적실험을 통해 형태적 움직임을 보정하는 실험을 수행하였다. 실험결과 기존의 능동형태 모델에 비해 반복연산의 횟수가 줄어들고, 다양한 형태로 나타나는 눈동자의 움직임 추적에 보다 안정적인 결과를 얻을 수 있었다.

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Lip Recognition using Lip Shape Model and Down Hill Search Method (입술의 형태 모델과 Down Hill 탐색 방법을 이용한 입술 인식)

  • 이임건;장경식
    • Journal of Korea Multimedia Society
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    • v.6 no.6
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    • pp.968-976
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    • 2003
  • In this paper, we propose a novel method for lip recognition. Lip model is built based on the concatenated gray level distribution model, and the recognition problem is simplified as the minimization problem of matching object function. The Down Hill Simplex Algorithm is used for the minimization with the proposed novel method for setting initial condition, which can refrain Iteration from converging to local minima. The proposed algorithm shows extracting lip shape from the test image where Active Shape Model fails.

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An Active Temporal Rule Model on Temporal Database (시간지원 데이터베이스 상의 능동적 시간지원 규칙 모델)

  • Park, Jeong-Seok;Kim, Hyun-Chul;Ryu, Keun-Ho
    • Journal of Internet Computing and Services
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    • v.1 no.1
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    • pp.15-26
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    • 2000
  • To efficiently manage data varying over time and process event driven transactions, some of the various database applications recently emerged require database systems supporting both a temporal data model and active rule processing. There has been much progress in independent research on temporal databases and active databases, but studies on databases which support both functions, have been rare. In this paper, an active temporal rule model supporting both active rule processing and temporal data model is presented with its rule expression language. This active temporal rule model contributes to the active function extension of the temporal database, and to establishing the concept of data access events which refer temporal attributes of data in active rules.

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Lip Recognition Using Active Shape Model and Shape-Based Weighted Vector (능동적 형태 모델과 가중치 벡터를 이용한 입술 인식)

  • 장경식
    • Journal of Intelligence and Information Systems
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    • v.8 no.1
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    • pp.75-85
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    • 2002
  • In this paper, we propose an efficient method for recognizing lip. Lip is localized by using the shape of lip and the pixel values around lip contour. The shape of lip is represented by a statistically based active shape model which learns typical lip shape from a training set. Because this model is affected by the initial position, we use a boundary between upper and lower lip as initial position for searching lip. The boundary is localized by using a weighted vector based on lip's shape. The experiments have been performed for many images, and show very encouraging result.

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Wavelet transform-based hierarchical active shape model for object tracking (객체추적을 위한 웨이블릿 기반 계층적 능동형태 모델)

  • Kim Hyunjong;Shin Jeongho;Lee Seong-won;Paik Joonki
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.11C
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    • pp.1551-1563
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    • 2004
  • This paper proposes a hierarchical approach to shape model ASM using wavelet transform. Local structure model fitting in the ASM plays an important role in model-based pose and shape analysis. The proposed algorithm can robustly find good solutions in complex images by using wavelet decomposition. we also proposed effective method that estimates and corrects object's movement by using Wavelet transform-based hierarchical motion estimation scheme for ASM-based, real-time video tracking. The proposed algorithm has been tested for various sequences containing human motion to demonstrate the improved performance of the proposed object tracking.

Design and Implementation of an Active Rule System on Temporal Databases (시간 데이터베이스에서 능동 규칙 시스템의 설계 및 구현)

  • Kim, Hong-Gyun;Nam, Kwang-Woo;Ryu, Keun-Ho;Lee, Jong-Hun
    • Proceedings of the Korea Information Processing Society Conference
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    • 2001.04a
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    • pp.85-88
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    • 2001
  • 이 논문은 시간 데이터베이스에 능동 규칙 시스템을 결합한 능동적 시간 데이터베이스의 능동 규칙 및 실행 모델을 제안하며 그 모델을 설계 구현한다. 기존의 시간 데이터베이스 능동 규칙 연구들이 시간 릴레이션에 대한 조건-조치 형태의 규칙 지원에 머물렀던데 비하여 제안하는 능동 규칙 모델은 유효시간 및 트랜잭션 시간을 지원하는 이원 시간 릴레이션에 대해 SQL3 트리거의 기능 모두를 시간 데이터베이스 상에서 지원한다. 즉, 전이 릴레이션 및 전이 변수, 조건-조치의 류플 및 문 단위 수항을 포함한다. 또한, 능동 규칙의 유효시간 정의 및 유효시간 사건 등의 새로운 개념을 제시하고 시스템 구조 및 설계 구현에 대하여 기술한다.

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Hierarchical Active Shape Model-based Motion Estimation for Real-time Tracking of Non-rigid Object (계층적 능동형태 모델을 이용한 비정형 객체의 움직임 예측형 실시간 추적)

  • 강진영;이성원;신정호;백준기
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.41 no.5
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    • pp.1-11
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    • 2004
  • In this paper we proposed a hierarchical ASM for real-time tracking of non-rigid objects. For tracking an object we used ASM for estimating object contour possibly with occlusion. Moreover, to reduce the processing time we used hierarchical approach for real-time tacking. In the next frame we estimated the initial feature point by using Kalman filter. We also added block matching algorithm for increasing accuracy of the estimation. The proposed hierarchical, prediction-based approach was proven to out perform the exiting non-hierarchical, non-prediction methods.

An Architecture and Model of Dynamic Service Control Platform for Personalized IPTV Service (IPTV 서비스 개인화를 위한 동적 서비스 제어 플랫폼 구조 및 모델)

  • Kim, Young-Jun;Chong, Il-Young
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.35 no.2B
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    • pp.313-324
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    • 2010
  • IPTV has been launched to provide a simple convergence service with broadcast and communication, and now it is evolving to support personalized service capabilities according to user's requirements. The paper presents DSON architecture and its control model to provide personalized features and user centric capability in IPTV services over service overlay network. Furthermore, the paper introduces DSON based service models on community IPTV and home IPTV service model.

Semantics of Active Rule in Active Temporal Databases (능동적 시간 데이터베이스에서 능동 규칙의 의미 모델)

  • Nam, Kwang-Woo;Ryu, Keun-Ho;Lee, Jong-Hun
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.38 no.3
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    • pp.41-54
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    • 2001
  • This paper propose an active rule and its semantic model integrating active rule system into temporal database. Most of previous works have been focused on condition action(CA) rule for temporal relations. However, proposed active rule model supports full SQL:3 trigger functionalitics including transition variable and table as well as tuple-level and statement-level active rules in E CA granularity. A bi-temporal concept of active rule and valid time event are also proposed newlv.

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