• Journal of Power System Engineering
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• v.13 no.2
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• pp.71-82
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• 2009

This paper presents a real-time haptic rendering method for a realistic force feedback in a remote environment with varying communication time-delay. The remote environment is assumed as a virtual environment based on a computer graphics, for example, on-line shopping mall, internet game and cyber-education. The properties of a virtual object such as stiffness and viscosity are assumed to be unknown because they are changed according to the contact position and/or a penetrated depth into the object. The DARMAX model based output estimator is proposed to trace the correct impedance of the virtual object in real-time. The output estimator is developed on the input-output relationship. It can trace the varying impedance in real-time by virtue of P-matrix resetting algorithm. And the estimator can trace the correct impedance by using a white noise that prevents the biased input-output information. Realistic output forces are generated in real-time, by using the inputs and the estimated impedance, even though the communication time delay and the impedance of the virtual object are unknown and changed. The generated forces trace the analytical forces computed from the virtual model of the remote environment. Performance is demonstrated by experiments with a 1-dof haptic device and a spring-damper-based virtual model.

• Journal of Korea Society of Digital Industry and Information Management
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• v.5 no.2
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• pp.29-37
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• 2009

Recently, the structure of simulation environment is important issue in all fields. In case of the training for operating the machines which are costly such as airplanes or spaceships, simulators could be helpful for decreasing the costs and training effects by simulating real situation. When we get the driving license, too many peoples are waiting for their turns because of limited cars and testing spaces in Korea. To solve this problem, we've designed and developed the basic design for the simulators. We suggested the Computer 3D Simulation Model for practice of a drives's license. The concept of this simulator was from a 3D Racing-game which suit for driving exercise. We provide users with handle-controlled simulation setting in order that users feel reality as if they drive really through this simulator. We also use 'force-feedback' system which give handle vibration in case users collide against obstacles or exceed the line since users can absorb the simulation program and feel the sense for the real. This paper is the study about modeling the driving exercise model made use of 'computer 3D simulation', and producing and utilizing the simulator through this modeling.

• Journal of the Korean Society of Costume
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• v.61 no.5
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• pp.48-63
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• 2011

Digital makeup(DM), depending upon computer graphic softwares, is applied to various fields, e.g. character works in movie and game industries and visual printouts in printing works. Focused on makeup field, DM is extremely conducive to developing, scientizing and informationalizing makeup patterns. Despite of unlimited potential of DM of which market size has been growing day by day, its practical use by domestic makeup experts and educators is much less active than expected as far, due to the lack of knowledge accumulation. The purpose of this study is to suggest some theoretical frameworks to generalize DM techniques and analyze two cases using the frames therefore support academicians' recent efforts to theorize DM techniques. The study 1) defines and categorizes the concepts of DM and DFX(digital special effect); 2) reviews the literature relevant to DM and generalizes the types and methods of DM techniques; 3) applies general frames to analyzing two movie cases, famous for their DM effects; 4) then suggests, based upon analytical results, some efficient ways for makeup experts to use DM techniques in practice. This study contributes to providing the theoretical grounds to conceptualize DM thus broadening makeup artists' interests in DM and awakening the scholarly concerns in cultural technology including DM.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.6
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• pp.2219-2224
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• 2010

Authoring AR(augmented-reality) contents not only takes too much time and cost, but also needs the help of professionals in the areas of computer science, VR(virtual reality), AR, 3D computer graphics, computer vision, etc. In this paper, we analyze the difficulties(inherent to developing AR contents) into three problems and present a formalized authoring approach for AR contents. The proposed approach is based on the Statecharts, which was originally designed for modeling real-time embedded systems. In order to apply he Statecharts to modeling AR contents, we defined the semantics of the Statecharts and various events for interaction modeling.

• Journal of Game and Entertainment
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• v.2 no.3
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• pp.15-23
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• 2006

In this paper, we present a case of making LOGO animation using particles with MAYA, a 3D computer graphics packages of Autodesk Inc. We composite a visual which shows a similar effects with a information movie of Torino 2006 Winter Olympic Games. By analysing the movie, we model a human body part as a set of cubes and animated the cubes to have dynamic visuals which shows similar visuals with the movie. All the system is implemented with MAYA MEL scripts. The system shows various visual effects by controlling options available in the designed UI.

• Archives of design research
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• v.11 no.1
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• pp.33-42
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• 1998

The movie, (Jurassic Park) made by ultramodern Computer Graphics has earned 100 million dollors admission fee in 9 days after opening release and has earned 3000 million dollors that add direct income to relative field income composed by fancy industry, theme park, and so on. If you compare the income with hollywood movies with ours total amount of export, you will know the contents industry scale Many countries weight on contents industry in national supports movies, now. All image softwares that have same target movies, computer game, animation, etc. compress to contents to entertainment and was expected to secure the superiority on the 21th ultramodern media industry. The one have hegemony 21th information period if how much have the contents by the dizital broadcasting. But meaning of intercultural communication play on important part more value of contents than value of political and economical aspect.

• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.19-23
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• 2008

The development of computer graphics techniques came after development of various entertainment industry such as movies, game and so on, and techniques that make diverse objects in virtual space and control the action of objects are growing rapidly. Especially objects(characters) play an important role in encouraging virtual space at computer animation field. If lots of objects are animated in virtual space, undesired matters of fixed topography or collision between objects etc occur. In order to solve this problem, we need control techniques in detail. This paper presents and implements collision evasion with submarine topography in a virtual aquarium and control technique about collision evasion with other objects.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.05a
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• pp.131-134
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• 2009

The development of computer graphics leads to high value-added products, such as film, game contents, 3D animation. In realistic animation, it is impossible and inefficient to produce the movement of each objects as handwork to display the various behaviors of a lot of characters. So we need the techniques of the crowd animation which presents the movement of objects realistically and efficiently by calculating automatically. In this paper, we designed a modeler which generates the attitudes of objects in crowd behavior animation using information of 3D models. We developed an animation system for crowd behavior which was applied for animation, VR, or games.

• International journal of advanced smart convergence
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• v.13 no.1
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• pp.23-36
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• 2024

Interest in virtual humans continues to increase due to the development of generative AI, extended reality, computer graphics technology, and the spread of a converged metaverse that goes beyond the boundaries between reality and virtuality. Despite the negative public opinion that virtual humans were just temporary form of entertainment event in the early days of their emergence, the reason they are showing continuous growth is due to the unique characteristics of virtual humans and the expansion of diverse usage from technological advancements. The production of video content using virtual humans is becoming vigorously active, but currently there is limitation and no exact process for the technology to apply virtual humans to video content for it to be produced accordingly to the characteristics or situations of virtual humans. In this study, we investigated the characteristics of virtual human production technology methods & processes, and identifying the impact of each production technology on the production environment through examples of virtual human content applied to domestic and international video contents. In conclusion, by proposing an appropriate production method for each content, we hope to develop and assist production practitioners so they can effectively use virtual humans in video content production.

• Journal of the Korea Computer Graphics Society
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• v.22 no.3
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• pp.43-52
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• 2016

This paper is to study techniques of a virtual reality to maximize the depth of the users' immersion based on differentiated interactive contents using korean traditional fairy tale. In order to increase more interests in korean traditional fairy tale, we produce a interactive 3D contents and propose a new approach to a system designing applying a virtual realities such as HMD, Leap motion. First, using Korean traditional fairy tale, we generate interactive contents consisting of scenes intensifying user's tensions while interaction of game process. Based on the interactive contents generated, we design scene generation using Oculus HMD, the gaze based input processes and a hand interface using Leap motion, in order to provide a multi dimensional scene transmission and an input process method to intensify the sense of the reality. We will verify through diverse tests whether the proposed virtual reality contents based on a technique of an input process will actually intensify the immersion in the virtual reality or not while minimizing the motion sickness of the users.