• Title/Summary/Keyword: Dynamic Object

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A block-based face detection algorithm for the efficient video coding of a videophone (효율적인 화상회의 동영상 압축을 위한 블록기반 얼굴 검출 방식)

  • Kim, Ki-Ju;Bang, Kyoung-Gu;Moon, Jeong-Mee;Kim, Jae-Ho
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.9C
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    • pp.1258-1268
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    • 2004
  • We propose a new fast, algorithm which is used for detecting frontal face in the frequency domain based on human skin-color using OCT coefficient of dynamic image compression and skin color information. The region where each pixel has a value of skin-color were extracted from U and V value based on DCT coefficient obtained in the process of Image compression using skin-color map in the Y, U, V color space A morphological filter and labeling method are used to eliminate noise in the resulting image We propose the algorithm to detect fastly human face that estimate the directional feature and variance of luminance block of human skin-color Then Extraction of face was completed adaptively on both background have the object analogous to skin-color and background is simple in the proposed algorithm The performance of face detection algorithm is illustrated by some simulation results earned out on various races We confined that a success rate of 94 % was achieved from the experimental results.

The Features of the Baroque Architecture viewed through the "Le Pli" of Deleuze (들뢰즈의 "주름 : Le Pli"을 통해 본 바로크 건축의 특성)

  • Lee, Young-Mi;Cheon, Deuk-Youm
    • Journal of architectural history
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    • v.17 no.6
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    • pp.7-27
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    • 2008
  • The primary object of this study lies in reilluminating the meaning of the Baroque, through studying arts and architecture by means of the features of Baroque aesthetics suggested by Deleuze in his writing 'Le Pli' on the basis of Leibniz's 'Pli' concept. Through this study we can see the following. In the first place, the six features - pli, separation between the inner and the exterior, highs and lows, unfolding, texture and paradigm presented as the features of Baroque aesthetics - have to be understood not as being independent features but as those derived from a series of continuous process of folding and unfolding. In the second place, Deleuze's thinking ranging from the 'Pli' of the Baroque to the paradigm derived on the ground of Leibniz thinking is a dynamic world of folding and unfolding, ultimately seeking unity through the topological changes and succession repeating deterritorization and reterritorization. In the third place, most architectural trends claiming 'Fold Architect' or the 'Pli' of Deleuze as their architectural philosophy are committing errors of mass-producing standardized designs by confining the meaning of Deleuze's 'Pli' concept into a simple reproduction of plied superficial things. With this finding in mind, the concept of folding and unfolding examined through reilluminating the Baroque Architecture where the 'Pli' concept is embodied, suggests to us that the problems of contemporary architecture should be rightened, and shows us that it can become an architectural philosophy which can be concretely realized in architecture.

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Coherent X-ray Diffraction Imaging with Single-pulse Table-top Soft X-ray Laser

  • Kang, Hyon-Chol;Kim, H.T.;Lee, S.K.;Kim, C.M.;Choi, I.W.;Yu, T.J.;Sung, J.H.;Hafz, N.;Jeong, T.M.;Kang, S.W.;Jin, Y.Y.;Noh, Y.C.;Ko, D.K.;Kim, S.S.;Marathe, S.;Kim, S.N.;Kim, C.;Noh, D.Y.;Lee, J.
    • Proceedings of the Optical Society of Korea Conference
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    • 2008.02a
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    • pp.429-430
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    • 2008
  • We demonstrate coherent x-ray diffraction imaging using table-top x-ray laser at a wavelength of 13.9nm driven by 10-Hz ti:Sapphire laser system at the Advanced Photonics Research Institute in Korea. Since the flux of x-ray photons reaches as high as $10^9$ photons/pulse in a $20{\times}20{\mu}m^2$ field of view, we measured a ingle-pulse diffraction pattern of a micrometer-scale object with high dynamic range of diffraction intensities and successfully reconstructed to the image using phase retrieval algorithm with an oversampling ratio of 1:6. the imaging resolution is $^{\sim}150$ nm, while that is much improved by stacking the many diffraction patterns. This demonstration can be extended to the biological sample with the diffraction limited resolution.

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Development of a Cartesian-based Code for Effective Simulation of Flow Around a Marine Structure - Integration of AMR, VOF, IBM, VIV, LES (효율적인 해양구조물 유동 해석을 위한 직교좌표계 기반의 코드 개발 - AMR, VOF, IBM, VIV, LES의 통합)

  • Lee, Kyongjun;Yang, Kyung-Soo
    • Journal of the Society of Naval Architects of Korea
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    • v.51 no.5
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    • pp.409-418
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    • 2014
  • Simulation of flow past a complex marine structure requires a fine resolution in the vicinity of the structure, whereas a coarse resolution is enough far away from it. Therefore, a lot of grid cells may be wasted, when a simple Cartesian grid system is used for an Immersed Boundary Method (IBM). To alleviate this problems while maintaining the Cartesian frame work, we adopted an Adaptive Mesh Refinement (AMR) scheme where the grid system dynamically and locally refines as needed. In this study, We implemented a moving IBM and an AMR technique in our basic 3D incompressible Navier-Stokes solver. A Volume Of Fluid (VOF) method was used to effectively treat the free surface, and a recently developed Lagrangian Dynamic Subgrid-scale Model (LDSM) was incorporated in the code for accurate turbulence modeling. To capture vortex induced vibration accurately, the equation for the structure movement and the governing equations for fluid flow were solved at the same time implicitly. Also, We have developed an interface by using AutoLISP, which can properly distribute marker particles for IBM, compute the geometrical information of the object, and transfer it to the solver for the main simulation. To verify our numerical methodology, our results were compared with other authors' numerical and experimental results for the benchmark problems, revealing excellent agreement. Using the verified code, we investigated the following cases. (1) simulating flow around a floating sphere. (2) simulating flow past a marine structure.

Development of e-CRM System Using LBS of Cellular Phone and Call Back URL SMS (휴대폰의 위치기반서비스와 Call Back URL SMS를 이용한 e-CRM 시스템 개발)

  • Jeon, Jin-Ho;Seo, Phil-Kyo
    • Journal of the Korea Society of Computer and Information
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    • v.15 no.3
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    • pp.121-128
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    • 2010
  • Whenever and wherever, recognizing location of object such as human as well as things, ubiquitous Location-Based Service which provides useful service based on this are rising as an important service. In this paper, we implemented customized real time 1:1 e-CRM system that can communicate with user's mobile phone through using Location-Based Service of mobile phone. Among various scenarios that are applicable to designed system, development and test were conducted based on scenario that provides shopping information and discount information to customers through SMS as they approach to vicinity of large discount store and allow them to download discount coupons through Call Back. The suggested system will be applied to various service event and can be used as a customized real time marketing method according to user's personal activity area.

The Control Method of Rehabilitation Assistance Mobile Robot Using Force-Reflection Joystick (힘 반향 조이스틱을 이용한 재활보조용 이동 로보트의 제어 기법)

  • 이응혁;권오상;김병수;민홍기;장원석;홍승홍
    • Journal of Biomedical Engineering Research
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    • v.18 no.4
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    • pp.447-456
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    • 1997
  • When the disabled is operating a rehabilitation assisting system with a joystick by himself, unlike in the case of a normal person, tremor with joystick control or instant miscontrol can often occur. If these misoperations should be directly relayed to the system, shaking or malfunction of the mobile rehabilitation assisting system might be the result. The safety of the disabled is of prime concern. To solve this problem, that is, to prevent the miscontrol of the disabled operator and avoid crashes into his or her surroundings, we propose the force-reflection locomotion algorithm with the joystick. This method uses ultrasonic sensors to measure the distance between the object and mobile robot. Based on the reception of sensory data, the necessary torque is applied via the joystick to the attatched motor. To confirm the effectiveness of the proposed method, the subjects on the reflected force by the dynamic characteristics of the joystick and the reflected force by the distance information are tested Even though there are some differences in human dexterity, we confirmed the fact that the information from the obstacles was relayed to the operator via the joystick and resulted in an improved operational performance and safety level with regard to those obstacles.

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Web Contents Mining System for Real-Time Monitoring of Opinion Information based on Web 2.0 (웹2.0에서 의견정보의 실시간 모니터링을 위한 웹 콘텐츠 마이닝 시스템)

  • Kim, Young-Choon;Joo, Hae-Jong;Choi, Hae-Gill;Cho, Moon-Taek;Kim, Young-Baek;Rhee, Sang-Yong
    • Journal of the Korean Institute of Intelligent Systems
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    • v.21 no.1
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    • pp.68-79
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    • 2011
  • This paper focuses on the opinion information extraction and analysis system through Web mining that is based on statistics collected from Web contents. That is, users' opinion information which is scattered across several websites can be automatically analyzed and extracted. The system provides the opinion information search service that enables users to search for real-time positive and negative opinions and check their statistics. Also, users can do real-time search and monitoring about other opinion information by putting keywords in the system. Proposing technique proved that the actual performance is excellent by comparison experiment with other techniques. Performance evaluation of function extracting positive/negative opinion information, the performance evaluation applying dynamic window technique and tokenizer technique for multilingual information retrieval, and the performance evaluation of technique extracting exact multilingual phonetic translation are carried out. The experiment with typical movie review sentence and Wikipedia experiment data as object as that applying example is carried out and the result is analyzed.

Proxy Caching Grouping by Partition and Mapping for Distributed Multimedia Streaming Service (분산 멀티미디어 스트리밍 서비스를 위한 분할과 사상에 의한 프록시 캐싱 그룹화)

  • Lee, Chong-Deuk
    • Journal of the Korean Institute of Intelligent Systems
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    • v.19 no.1
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    • pp.40-47
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    • 2009
  • Recently, dynamic proxy caching has been proposed on the distributed environment so that media objects by user's requests can be served directly from the proxy without contacting the server. However, it makes caching challenging due to multimedia large sizes, low latency and continuous streaming demands of media objects. To solve the problems caused by streaming demands of media objects, this paper has been proposed the grouping scheme with fuzzy filtering based on partition and mapping. For partition and mapping, this paper divides media block segments into fixed partition reference block(R$_f$P) and variable partition reference block(R$_v$P). For semantic relationship, it makes fuzzy relationship to performs according to the fixed partition temporal synchronization(T$_f$) and variable partition temporal synchronization(T$_v$). Simulation results show that the proposed scheme makes streaming service efficiently with a high average request response time rate and cache hit rate and with a low delayed startup ratio compared with other schemes.

Geovisualization Environment for Spatio-temporal Trajectory of Personal Activity (시공간 개인통행자료의 지리적 시각화)

  • Ahn Jae-Seong;Lee Yang-Won;Park Key-Ho
    • Journal of the Korean Geographical Society
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    • v.40 no.3 s.108
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    • pp.310-320
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    • 2005
  • This study attempts at prototyping and evaluating a geovisualization tool that summarizes and explores human activity patterns using spatio-temporal trajectory data collected from GPS receiver. A set of core conceptualization developed in 'time geography' is successfully represented by our prototype based on the notion of 'space-time cube.' The notions of 'temporal dispersion cylinder' and 'parallel plane plot' are also implemented to allow funker analyses of human activity pattern on the space-time trajectory. The capabilities of the geovisualization environment we proposed include the interactive and dynamic functions that support a variety of explorations on the three components of spatio-temporal data : space(where), time(when), and object(what).

A Study on the Expressive Characteristics of Czech Cubism's furniture Design - chiefly focusing on mutual relationship with Czech Cubism's painting, craft, and architecture (체코 큐비즘 가구디자인에 나타난 표현특성에 관한 연구 - 회화, 공예, 건축과의 상호연관성을 중심으로 -)

  • Choi Byung Hoon;Kim Jin Woo
    • Korean Institute of Interior Design Journal
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    • v.14 no.3 s.50
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    • pp.165-172
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    • 2005
  • Cubism is a style that led the way to proclaim a new era of 20th century's art and contemporarily had an influence on several trends of thoughts. Geographically it formed Czech Cubism exerting an effect upon thoughts and plastic art of the progressive art group which showed activity around Prague, Czech in 1911, later for 10 years, it was developed as an unique form of which origin cannot be traced inside and outside Europe and expressed its own plastic art world in craft, furniture, painting, architecture, etc. The object of this study is to pull out the expressive characteristics showed especially in furniture design among Czech Cubism around interrelationship with painting, craft and architecture. The scope of study is to bring out the characteristics about the examples which 7 designers such as Josef Gocar, Pavel Janak, etc., who were representative designers of furniture design of Czech Cubism for 15 years from 1910 to 1925. The method of study is to investigate the origin of Czech Cubism by means of primitive elements of Africa, traces of Islamic architectures, and Czech traditional architectural motive, and the development process of Czech Cubism was arranged around the artist and exhibitions which led this current. After being synthesized the characteristics showed in painting, craft, architecture of Czech Cubism on the basis of the result of this study, the expressive characteristics of furniture design of Czech Cubism were brought out. As a result, the expressive characteristics of furniture design of Czech cubism are indicated in a large way as follow; 1) symbolic characteristic based on primitive plastic art, 2) dynamic characteristic by dividing form, 3) ethnic decorative characteristic combined with national motive. The significance of furniture design of Czech Cubism is not only to accept positively and digest the progressive trend of modern art, that is to say, Paris Cubism but also to succeed in recreate it in its own national style, to play a role to offer another motive to post modern design development at the end of 20th century and by means of these examples to provide the necessity and the base of more profound study in the future.