• Title, Summary, Keyword: 복수영역

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Gesture Recognition in Multiple People Environment (복수 등장인물을 대상으로 한 제스처 인식)

  • Hong, Seok-Ju;Setiawan, Nurul Arif;Kim, Song-Gook;Kim, Jang-Woon;Lee, Chil-Woo
    • 한국HCI학회:학술대회논문집
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    • pp.891-896
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    • 2007
  • 지금까지 진행된 제스처 인식 연구는 한 사람을 대상으로 정적인 환경을 가정하여 이루어져 왔다. 본 논문에서는 복수의 등장인물이 존재하는 환경에서 대화 상대를 선택하여 제스처를 인식하는 방법에 대해 기술한다. 먼저 복수의 인물이 존재하는 환경에서 배경영역을 제외한 행위자의 영역을 추출한다. 그 후 각각의 행위자를 트래킹하면서 카메라와 가장 가까이 있는 행위자를 대화 상대자로 선택한다. 대화상대자가 선택되면 스테레오 카메라에서 입력된 영상에서 추출된 실루엣 이미지를 이용하여 얼굴과 두 손을 특징 영역으로 하여 매 프레임마다 Kalman filter를 사용하여 각 영역을 트래킹한다. 트래킹되는 특징 영역의 2차원 좌표 값을 모델 제스처의 2차원 좌표 값과 비교하여 가장 높은 유사값을 갖는 모델 제스처를 입력 제스처로 인식하게 된다. 본 논문에서 사용한 방법은 복수의 등장인물이 있는 경우 효과적으로 행위 대상자를 선택하여 제스처를 인식할 수 있다. 또한 제스처 인식에 있어서 단순한 큐 매칭을 사용함으로써 계산이 복잡하지 않은 장점이 있다. 실험을 통해 본 논문에서 제시한 방법을 적용함으로써 복수의 인물이 등장하는 환경에서 제스처 인식이 가능함을 입증한다.

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Narrow Band Interference Rejection for Spectrum Overlay Communications (주파수 복수통신을 위한 협대역 간섭신호제거)

  • 김제우;김희동;조동호
    • Information and Communications Magazine
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    • v.13 no.11
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    • pp.181-191
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    • 1996
  • In this paper we discuss narrow-band interference rejection schemes for spectrum overlay communications where direct sequence spread spectrum (DS/SS) communication system and narrow-band communication systems share the same frequency band. In this case, it is essential to reject the narrow-band signals to guarantee the performance of DS/SS system, while it is not necessarily required to reject the DS/SS signal to recover the narrow-band signal. We discuss several schemes such as time domain processing, frequency domain processing and exploiting the device characteristics to reduce the effect of narrow-band signal on DS/SS communication systems. Furthermore, we suggest a structure of tunable notch filter using gyrator that can easily be customized to ASIC.

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A Study on the Interpolation of Disparity in Segmentation-based Stereo Matching (영역 분할 기반 스테레오 정합의 변위 보간에 관한 연구)

  • 곽노윤
    • Proceedings of the Korea Multimedia Society Conference
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    • pp.371-376
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    • 2002
  • 본 논문은 영역 분할에 기반한 스테레오 정합에 있어서, 분할영역 내부에 존재하는 단계적인 변위의 변화를 추정할 수 있는 스테레오 정합 알고리즘에 관한 것이다. 우선, 분할영역을 효과적으로 표현할 수 있는 복수의 샘플점들을 선정한 다음에 각 샘플점 주위에 인접한 영역 내부의 미소영역을 취하여 스테레오 정함을 수행한다. 이후, 획득된 각 샘플점들의 변위를 이용하여 평면의 방정식을 통해 내부 변위를 보간함으로써 연산 시간을 감축함과 동시에 영역 내부의 단계적인 변위의 변화를 추정할 순 있다. 제안된 방법에 따르면, 분할된 영역을 사용함으로써 분할영역 자체가 구속 조건이 되어 특징 기반 기법들의 단점인 변위 보간의 문제점을 해결할 수 있다. 특히, 복수의 샘플점들 간의 변위차를 이용함으로써 영상 평면에 대해 깊이 방향으로 기울어진 영역 평면에 대한 변위의 기울기를 보간할 수 있음에 기인하여 조밀한 변위 맵을 얻을 수 있었다.

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Shape Design Sensitivity Analysis of Two-Dimensional Thermal Conducting Solids with Multiple Domains Using the Boundary Element Method (경계요소법을 이용한 2 차원 복수 영역 열전도 고체의 형상 설계 민감도 해석)

  • 이부윤;임문혁
    • Journal of the Korean Society for Precision Engineering
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    • v.20 no.8
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    • pp.175-184
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    • 2003
  • A method of the shape design sensitivity analysis based on the boundary integral equation formulation is presented for two-dimensional inhomogeneous thermal conducting solids with multiple domains. Shape variation of the external and interface boundary is considered. A sensitivity formula of a general performance functional is derived by taking the material derivative to the boundary integral identity and by introducing an adjoint system. In numerical analysis, state variables of the primal and adjoint systems are solved by the boundary element method using quadratic elements. Two numerical examples of a compound cylinder and a thermal diffuser are taken to show implementation of the shape design sensitivity analysis. Accuracy of the present method is verified by comparing analyzed sensitivities with those by the finite difference. As application to the shape optimization, an optimal shape of the thermal diffuser is found by incorporating the sensitivity analysis algorithm in an optimization program.

Multiple-Model Probabilistic Design of Repetitive Controllers (연속반복학습제어의 복수모형 확률설계기법)

  • Lee, Soo-Cheol
    • Journal of the Korea Industrial Information Systems Research
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    • v.13 no.2
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    • pp.1-7
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    • 2008
  • This paper presents a method to design a repetitive controller that is robust to variations in the system parameters. The uncertain parameters are specified probabilistically by their probability distribution functions. Instead of working with the distribution functions directly, the repetitive controller is designed from a set of models that are generated from the specified probability functions. With this multiple-model design approach, any number of uncertain parameters that follow any type of distribution functions can be treated. furthermore, the controller is derived by minimizing a frequency-domain based cost function that produces monotonic convergence of the tracking error as a function of repetition number. Numerical illustrations show how the proposed multiple-model design method produces a repetitive controller that is significantly more robust than an optimal repetitive controller designed from a single nominal model of the system.

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A Critical Approach to Thriller Films as Male-centric Narratives : Focusing on & (스릴러 영화의 남성 중심적 서사에 대한 비평적 접근 : <아저씨>와 <악마를 보았다>를 중심으로)

  • Hwang, Hye-Jin
    • Cartoon and Animation Studies
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    • pp.65-80
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    • 2011
  • The purpose of this study is to analyze & through the hypothesis which thriller films based their narratives on the specific characteristics of Koeran society have became mainstream genre in recent Korean film industry. In the viewpoint that popular films and discourses provide the imaginary form of solving problems which threatens the maintenance of status quo in real world. & intend to disclose the identities of antagonist who condense the contradiction of Korean Society and then represent protagonist's practices to integrate disruptions from that contradictions through being a revenger. In the process of reading texts, the fact that there are some crisis in Korean Society not only public realm but also private realm and male-subjects as protagonists struggle for protecting private realm has revealed. But each film appeals to the public using two different narrative strategies. has got popularity by making a fantasy which male-subject success to rebuild the family and punish antagonist severely. In the meantime the protagonist of cannot believe his victory, this kinds of anxiety might come from the traces of antagonist as reflects so many contradictions of Korean Society. At this point, we can expect there will be something new which retrospect our own history and gaze reality itself without ideologically given complex in Korean films in the near future.

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Multiple-Model Probabilistic Design for Centralized Repetitive Controllers of Multiple Systems (다물체시스템의 중앙집중 연속학습제어 복수모형 확률설계기법)

  • Lee, Soo-Cheol
    • Journal of the Korea Industrial Information Systems Research
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    • v.16 no.4
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    • pp.99-105
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    • 2011
  • This paper presents a method to design a centralized repetitive controller that is robust to variations in the multiple system parameters. The uncertain parameters are specified probabilistically by their probability distribution functions. Instead of working with the distribution functions directly, the centralized repetitive controller is designed from a set of models that are generated from the specified probability functions. With this multiple-model design approach, any number of uncertain parameters that follow any type of distribution functions can be treated. Furthermore, the controller is derived by minimizing a frequency-domain based cost function that produces monotonic convergence of the tracking error as a function of repetition number. Numerical illustrations show how the proposed multiple-model design method produces a repetitive controller that is significantly more robust than an optimal repetitive controller designed from a single nominal model of the multiple system.

Area Search of Multiple UAV's based on Evolutionary Robotics (진화로봇공학 기반의 복수 무인기를 이용한 영역 탐색)

  • Oh, Soo-Hun;Suk, Jin-Young
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.38 no.4
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    • pp.352-362
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    • 2010
  • The simultaneous operation of multiple UAV's makes it possible to enhance the mission accomplishment efficiency. In order to achieve this, easily scalable control algorithms are required, and swarm intelligence having such characteristics as flexibility, robustness, decentralized control, and self-organization based on behavioral model comes into the spotlight as a practical substitute. Recently, evolutionary robotics is applied to the control of UAV's to overcome the weakness of difficulties in the logical design of behavioral rules. In this paper, a neural network controller evolved by evolutionary robotics is applied to the control of multiple UAV's which have the mission of searching limited area. Several numerical demonstrations show the proposed algorithm has superior results to those of behavior based neural network controller which is designed by intuition.

전계해석을 위한 유한 요소법의 활용

  • 정상진
    • 전기의세계
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    • v.36 no.10
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    • pp.713-721
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    • 1987
  • 본고에서는 유한요소법(FEM:Finite Element Method)을 활용하여 이방법의 장점인 복수법, 시변전계 및 직류이온장의 해석기법을 소개하고 그약점인 개방된 영역의 전계해석을 위한 경계이완법의 설명과 계산예, 그리고 유한요소법에 의한 전계계산법의 문제점과 향후전망을 언급코자 한다.

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A Study on Characteristics of pH Control with Amines in the Secondary Side of Nuclear Power Plants (원전 2차 계통에서 아민의 pH 제어 특성 연구)

  • Rhee, In-H.;Ahn, Hyun-Kyoung;Park, Byung-Gi;Jun, Gwon-Hyuk;Ho, Song-Chan
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.8
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    • pp.3112-3118
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    • 2010
  • The pH control agent in PWRs, to insure the integrity of steam generator, was changed from ammonia to ethanolamine(ETA) which decreased pH at condensate system and low pressure feedwater heater drain system, so that several amines were investigated for the selection of the optimum amine. There was no single alternative amine to meet the optimum condition. The more volatile ammonia provides the higher pH in condensate, while the less volatile ETA increases the pH in wet steam area. Thus, the combined amine of ammonia and ETA is able to equally raise the pH in both region so that the flow accelerated corrosion be reduced in the every system of the secondary side and the integrity of steam generator be also improved in pressurized water reactors (PWRs).