• Title/Summary/Keyword: Media Transformation

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Producing Stereoscopic Video Contents Using Transformation of Character Objects (캐릭터 객체의 변환을 이용하는 입체 동영상 콘텐츠 제작)

  • Won, Jee-Yean;Lee, Kwan-Wook;Kim, Man-Bae
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2010.07a
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    • pp.307-309
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    • 2010
  • 본 논문에서는 깊이맵을 활용하여 살아있는 객체 입체영상 구현을 제안한다. 살아있는 객체 입체영상은 입력영상에 있는 각 객체가 움직이도록 제작되어 2D영상의 시청에서 살아있는 객체들을 시청할 수 있다. 제안 시스템은 C언어를 기반으로 제작되었으며, 한 장의 영상이 주어지면 그래픽 툴을 이용하여 영상에 따른 배경영상, 마스크 영상, 배경 깊이맵 영상, 객체 깊이 맵영상 파일을 생성한다. 이렇게 제작된 입력영상, 마스크영상을 이용하여 각 객체를 이동, 회전, 확대/축소를 통해 결과적으로 살아있는 객체로 구현하며, 이에 따라 변환된 영상에 깊이맵영상을 이용하여 실감있는 입체영상으로 구현한다. 실험영상은 조선시대 화가인 신윤복의 단오풍정을 이용하여 2D 입체영상으로 구현하였다.

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AN APPROXIMATE ANALYTICAL SOLUTION OF A NONLINEAR HYDRO-THERMO COUPLED DIFFUSION EQUATION

  • Lee, Jeong-woo;Cho, Won-cheol
    • Water Engineering Research
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    • v.2 no.3
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    • pp.187-196
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    • 2001
  • An approximate analytical solution of a nonlinear hydro-thermo coupled diffusion equation is derived using the dimensionless form of the equation and transformation method. To derive an analytical solution, it is drastically assumed that the product of first order derivatives in the non-dimensionalized governing equation has little influence on the solution of heat and moisture behavior problem. The validity of this drastic assumption is demonstrated. Some numerical simulation is performed to investigate the applicability of a derived approximate analytical solution. The results show a good agreement between analytical and numerical solutions. The proposed solution may provide a useful tool in the verification process of the numerical models. Also, the solution can be used for the analysis of one-dimensional coupled heat and moisture movements in unsaturated porous media.

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Study of 4-Nitroazoxybenzenes (Part II) The Nature of $\alpha$-and $\beta$-4-Nitroazoxybenzene in Strongly Acidic Solution (4-Nitroazoxybenzene에 關한 硏究 (第2報) 强酸 溶液中에서의 $\alpha$- 및 $\beta$-4-Nitroazoxybenzene의 性質)

  • Chi Sun Hahn
    • Journal of the Korean Chemical Society
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    • v.7 no.4
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    • pp.225-229
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    • 1963
  • The nature of the two isomers of 4-nitroazoxybenzenes in strongly acidic solution have been analyzed by U.V. spectrophotometry. Oxygen atom in the azoxy-group of $\alpha$-and $\beta$-4-nitroazoxybenzene in strong acid solution migrates neither to para position nor ortho position of the unsubstituted benzene ring of the compound in contrast with the cases of methyl-and bromo-substituted azoxybenzene, and shown no Wallach rearrangement. Since the $^1A{\rightarrow}^1H$ bands of the spectra shown hyperchromic effect whereas the ${\pi}{\rightarrow}{\pi}^*$ bands of them exhibit extream hypochromic effect, it appears most likely that trans ${\rightarrow}$cis isomerization take place in the media. A mechanism of a triangular transition state by which the transformation might be proceeded, is proposed.

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Analysis of Wave Reflection from an Open-Ended Coaxial Probe Using the FDTD Method (FDTD 방법을 이용한 동축선로 끝단에서의 전파반사 분석)

  • 박기억;손병문;오이석;구연건
    • Journal of the Korean Institute of Telematics and Electronics D
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    • v.35D no.10
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    • pp.7-12
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    • 1998
  • The wave reflections from several types of open-ended coaxial probes contacted on the various materials have been analyzed precisely by using the finite-difference time-domain(FDTD) technique in this paper. Due to the coordinate transformation from three-dimension to two-dimension, the computation was performed very efficiently. It was found that the reflection from an open-ended coaxial probe reduces as frequency or diameter of a coaxial line increases. The reflections from multi-layered media were also analyzed by the FDTD method. This analysis technique was verified by comparison with measurements and theoretical computations.

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Novel Synthesis of Hydrophilic Dipolar Chromophores using Dendronized Sulfonates

  • Kim, Mi-Rae;Maheswara, Muchchintala;Do, Jung-Yun
    • Bulletin of the Korean Chemical Society
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    • v.32 no.2
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    • pp.664-672
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    • 2011
  • A series of hydrophilic chromophores was synthesized through introduction of dendritic sulfonate anions using click chemistry. A dendron structure bearing several sulfonate groups enhances hydrophilicity of attached chromophores. A click triazole formation connects chromophores with hydrophilic groups. A neutral trichloroethyl sulfonate has versatile features such as easy introduction, chemical endurance for isolation or storage, and convenient transformation to a hydrophilic anion. Zinc and OH mediated cleavage of trichloroethyl group from the neutral sulfonate undergoes to generate a water-soluble sulfonate anion. The solubility was examined with different counter cations and in different pH media and thus increased with the number of attached sulfonate ion. Two hydrophilic chromophores of stilbene-derived and azobenzene-derived dipolar structures exhibit clear negative and positive solvatochromism in protic solvents, respectively.

AN INTERACTIVE BUILDING MODELING SYSTEM BASED ON THE LEGO CONCEPT

  • Chen, Sheng-Yi;Lin, Cong-Kai;Tai, Wen-Kai
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2009.01a
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    • pp.128-135
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    • 2009
  • In this paper, we proposed an interactive GUI (Graphical User Interface) system to model buildings with an editable script. Our system also provides probabilistic finite-state machine (PFSM) to define the relationships of sub-models with transformation matrices and transition probabilities for constructing new novel building models automatically. User can not only get various building models by PFSM but also adjust the probabilities of sub-models from PFSM to get desired building models. As shown in the results, the various and vivid building models can be constructed easily and quickly for non-expert users. Besides, user can also edit the script file which is provided by our system to modify the properties directly.

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A FACE IMAGE GENERATION SYSTEM FOR TRANSFORMING THREE DIMENSIONS OF HIGHER-ORDER IMPRESSION

  • Ishi, Hanae;Sakuta, Yuiko;Akamatsu, Shigeru;Gyoba, Jiro
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2009.01a
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    • pp.703-708
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    • 2009
  • The present paper describes the application of an improved impression transfer vector method (Sakurai et al., 2007) to transform the three basic dimensions (Evaluation, Activity, and Potency) of higher-order impression. First, a set of shapes and surface textures of faces was represented by multi-dimensional vectors. Second, the variation among faces was coded in reduced parameters derived by applying principal component analysis. Third, a facial attribute along a given impression dimension was analyzed to select discriminative parameters from among principal components with higher sensitivity to impressions, and obtain an impression transfer vector. Finally, the parametric coordinates were changed by adding or subtracting the impression transfer vector and the image was manipulated so that its facial appearance clearly exhibits the transformed impression. A psychological rating experiment confirmed that the impression transfer vector modulated three dimensions of higher-order impression. We discussed the versatility of the impression transfer vector method.

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Interpolation in the transformation domain by camera model (카메라 모델에 의한 변환 영역에서 보간)

  • 이학무;강문기
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 1998.06a
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    • pp.127-130
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    • 1998
  • 3차원의 영상을 2차원 화면에 투영시키기 위해서는 영상에 대한 카메라의 촬영 각도와 촬영 거리를 일치시켜주어야 한다. 이를 위해서 다른 각도와 거리에서 촬영한 영상을 같은 각도와 거리에서 촬영한 영상으로 만들어 주는 변환을 만들었다. 그러나 이러한 변환을 하였을 때 디지털 영상은 경계부분이나 직선 등이 끊어지는 현상이 발생하게 된다. 본 논문에서는 변환된 영역에서의 정수 점에 원래 영상의 점을 바로 대응시키지 않고 주변 점의 다항식으로 나타낼 수 있다. 이 다항식의 계수를 정하는 방법으로 변환된 영역에서의 정수 점에 대응하는 원래 영상의 점을 구하여 2차 선형 보간법(Bilinear interpolation)을 사용하였다. 변환된 영역에서의 정수 점에 대응하는 원래 영상에서의 좌표를 얻기 위해 주변 4개의 점 내에서는 부분적으로 선형적임을 가정하였다. 위의 방법으로 주변 점들의 에너지를 각 정수 점들로 분산시킴으로써 경계 점이나 직선들이 잘 보존된 상태로 변환할 수 있었다.

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Signal Detection Using Sparse Transformation and Compressed Sensing (Sparse화를 통한 압축센싱에 기반한 신호검출기법에 관한 연구)

  • Lee, Jaeseok;Wang, Jian;Shim, Byonghyo
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2012.07a
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    • pp.317-318
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    • 2012
  • Sparse한 신호 복원 방법으로 underdetemined system에서 11-minimization을 이용한 compressive sensing의 연구와 함께, 11-minimization 비해 간단한 greed 알고리듬도 활발히 연구되고 있다. 이에 본 논문은 greed 알고리듬의 대표적인 orthogonal matching pursuit기법에서 iteration 마다 support 선택 개수에 따른 성능을 연구한다. 모의 실험을 통해 OMP의 iteration 단계에서 하나의 support만 선택하는 것보다 다수의 support를 선택하는 것이 더 낮은 sparsity의 신호를 복원할 수 있고 더 낮은 계산량의 이득을 가져오는 것을 확인 할 수 있다.

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Transformation of Stereoscopic Images for 3D Perception Improvement (입체영상의 3D 증강을 위한 입체영상 변환)

  • Gil, Jong-In;Kim, Manbae
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2012.07a
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    • pp.325-327
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    • 2012
  • 최근 국내외 디지털 가전 업체들은 다양한 3D 기술을 앞세워 가정 내에서도 편하게 즐길 수 잇도록 다양한 3DTV를 출시하고 있다. 이러한 3DTV에서 입체영상을 시청하기 위해서는 입체콘텐츠가 제작되어 전송되어야 한다[1]. 이러한 입체 콘텐츠는 RGB 영상과 깊이맵을 이용하여 생성할 수 있는데, 이때 깊이맵은 사용자의 용도에 따라 다양한 형태로 변환될 수 있다. 최근엔 이러한 깊이맵과 3D 영상의 컬러를 변환하여 지각 깊이감을 개선하는 영상처리 기술에 대한 관심이 높아지고 있다. 이에 따라, 본 논문에서는 기존의 컬러 변환을 통한 2D 영상의 지각 깊이감 개선을 입체영상에 적용하여, 3D 지각 입체감을 동시에 향상시키는 방법을 제안한다. 이를 위해 대조 변환 및 배경 다크닝 방법을 제안하고, 실험을 통해 제안 방법이 상기 목적을 얻을 수 있는 것을 검증하였다.

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