• Archives of design research
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• v.17 no.3
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• pp.101-110
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• 2004

The purpose of this study is to draw a distinction between general computer graphics courses and game development ones and to find out making various improvements in game graphics courses. In addition to general hand-drawing skills and computer graphics technology which are essential for the students who major in game graphics; however, the special classes should be required for them to comprehend the work process of game development and to produce the game graphics data. This necessity of the discriminative education is going to be an identification of game development department. Although loading game data onto a game engine and finding out the solution to problems of data is one of the excellent settlement for educating game graphics students, it is not possible to purchase the commercial game engine such as Quake or Lithtech and to analyze the commercial program libraries. For this reason, this research presents the replacement of commercial game engine with VRML97 for the academic purpose and shows what effect upon education will be. It is expected that the VRML97 can be a substitute of the game engine for the effectiveness of game graphics education with more active study and verification of game fields.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.7 no.1
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• pp.56-67
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• 2013

Because H.264/SVC can meet the needs of different networks and user terminals, it has become more and more popular. In this paper, we focus on the spatial resolution scalability of H.264/SVC and propose a blind video watermarking algorithm for the copyright protection of H.264/SVC coded video. The watermark embedding occurs before the H.264/SVC encoding, and only the original enhancement layer sequence is watermarked. However, because the watermark is embedded into the average matrix of each macro block, it can be detected in both the enhancement layer and base layer after downsampling, video encoding, and video decoding. The proposed algorithm is examined using JSVM, and experiment results show that is robust to H.264/SVC coding and has little influence on video quality.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.792-799
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• 2006

회화적 렌더링의 궁극적 목적은 주어진 영상을 사람이 직접 그린듯한 회화적 느낌을 가미하는 것이다. 이러한 회화적 느낌을 표현하기 위한 중요한 요소에는 브러시의 그리는 방향과 다양한 브러시 사이즈, 그리고 캔버스 위에 브러시로 그려지는 위치 등이 있다. 본 논문에서는 브러시의 방향을 효과적으로 표현하기 위해 영상의 방향 보간을 먼저 하였다. 그리고 입력 영상과 캔버스의 최대 차이점에서 에지와의 거리를 고려하여 동적인 브러시의 사이즈를 표현 하였다. 그리고 그려진 주변의 일정 영역 안에서 다시 최대 차이점을 찾아나가는 방법으로 다음 브러시의 위치를 결정하였다. 이렇게 실제 회화를 그리는 과정을 따라감으로써 사실적인 회화적 렌더링의 결과를 얻을수 있었다.

• The Korean Journal of Applied Statistics
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• v.6 no.1
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• pp.23-28
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• 1993

The increase in computing power and the decrease in price of computers has enabled statistical computer graphics to progress tremendously in recent years. Many people can now access to the newly developed computer graphical methods easily. The direct manipulation on screen and the symultaneous realization of the results are two main ingradients of dynamic graphics. We compare the dynamic graphical features in two relatively new packages; SPLUS and XLISP-STAT. XLISP-STAT is very lean packed with powerful dynamic graphical tools. The statistical computer graphics, being still in the state of infancy, has a lot of room to grow, and is a new research area with a great potential.

• Proceedings of the Korea Society for Simulation Conference
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• 2001.10a
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• pp.237-247
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• 2001

In this paper we present an overview of existing state of the art visualization techniques fur the interactive analysis of results from numerical simulations and measurements. We describe the basic concepts and key ideas behind these different visualization methods in this paper. The potential of these techniques for an efficient integration into a virtual reality environment will be investigated. Furthermore we present our first demonstrator fur visualizing multiparametric data and give an outlook on our plans for further exploiting and developing these techniques in an upcoming project.

• YAKHAK HOEJI
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• v.38 no.6
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• pp.721-724
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• 1994

According to computer graphics/Grid search analysis, ${\beta}-keto$ carboxylic acid of nalidixic acid which has an antibacterial activity as DNA-gyrase inhibitor has been known to have got four different conformational energy values. In orders, the energy value of conformation A,B,C and D was -6.603, -4.114, -1.766 and 7.327 kcal/mol. The difference of energy value between conformation A and D was 13.9 kcal/mol. Usually conformation C was used in literature. However, it had a energy value of -1.766 kcal/mol as the result of the analysis which is about 5 kcal/mol higher than the most stable conformation A. Therefore, conformation A is expected to be more stable than conformation C.

• Journal of the Korea Computer Graphics Society
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• v.23 no.3
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• pp.47-54
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• 2017

In this paper, we propose an improved curvature-based GPU (Graphics Processing Unit) isosurface ray-casting technique. Our method adopts the fast evaluation method proposed by Sigg et al. [1] to find the isosurface, but replaces the computation of the gradient and Hessian with the de Boor algorithm. In this way, we can reduce the number of additional texture fetches from 84 to 27 thus improving the performance by up to ${\approx}30%$, depending on the platforms.

• Journal of the Korea Computer Graphics Society
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• v.10 no.4
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• pp.6-12
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• 2004

웹은 플랫폼에 의존하지 않고 모든 사람들이 공통으로 이용할 수 있는 인터페이스를 제공하기 때문에 웹브라우저상에 3차원 의료 데이터를 가시화하여 표현한다면 원격 진단, 의료 교육 등에 이용될 수 있다. 이 논문은 3차원 의료정보를 3차원 의료 볼륨 데이터, 3차원 의료 영상, 볼륨 렌더링 응용의 3 종류로 구분하여 이들을 XML로 표현하는 방법 및 텍스처 맵핑 기반의 디렉트볼륨렌더링(Direct Volume Rendering)을 SVG(Scalable Vector Graphics)으로 표현하여 SVG 뷰어 상에 표시하는 방법을 제안한다. 제안 방법의 실행 결과는 웹 브라우저 상에서 의료데이터의 분석이 가능하게 하고, 또한 볼륨렌더링 응용프로그램을 SVG로 표현, 결과 이미지를 SVG 뷰어로의 표시가 가능하다는 것을 보여준다.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04b
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• pp.643-645
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• 2000

This paper puts emphasis on navigation in virtual environment, which is one of the major interfaces for the interactivity between human and virtual environment in virtual reality circumstances and worlds. It proposes a new navigation method: 2d Map-Based navigation, which prevents user's spatial lost in 3D Virtual Environment. The 2D Map-Based Navigation is composed of three major processes, Constant Velocity Navigation, Collision Detection and Avoidance, and Path Adjustment. The 2D Map-Based Navigation can reduce user's difficulties and improve user's sense of presence and reality in the virtual environments. The experiment study proved that the 2D Map-Based Navigation is a very natural, straightforward and useful navigation interface in the virtual environment.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06a
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• pp.103-105
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• 2006

회화적 렌더링의 궁극적 목적은 입력된 이미지를 가지고 손으로 그린듯한 느낌을 표현하는 것이다. 이러한 회화적 느낌을 표현하기 위한 요소에는 브러시의 위치 방향, 그리고 사이즈 등이 있다. 본 논문에서는 다음 그려질 위치가 정적 격자단위로 정해지는 것이 아닌 동적인 격자를 사용하여 결정되었다. 이때 브러시의 방향을 효과적으로 표현하기 위해 영상의 방향 보간을 하였다. 그리고 입력 영상과 캔버스의 최대 차이점에서 에지와의 거리를 고려하여 동적인 브러시의 사이즈를 표현하였다. 그리고 텍스처를 가진 다양한 브러시를 사용하여 질감을 효과적으로 표현하였다. 위의 과정들을 통하여 전통적인 오일 페인팅(oil painting)의 결과를 얻을 수 있었다.