• Electronics and Telecommunications Trends
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• v.26 no.4
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• pp.123-133
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• 2011

2009년 말 개봉된 영화 아바타의 흥행 성공과 함께 새롭게 시작된 3차원 영상에 대한 열풍은 영화뿐 아니라 방송, 게임 등 영상산업 전반에 커다란 파급효과를 가져왔다. 이에 그치지 않고, 디스플레이의 대형화 추세에 따라 대화면 TV가 범용화되면서 초고해상도 고품질 영상에 대한 소비자의 욕구가 어느 때보다 높아졌고, 주요 선진국에서는 Post-HDTV 시대를 선점하기 위하여 치열한 경쟁 속에 차세대 방송 서비스를 준비하고 있다. HDTV 이후의 차세대 방송을 UHDTV라고 하며, 가정에서 70mm 영화보다 뛰어난 화질(HD 화면 4~16배 크기에 해당, 최대 비디오 해상도 $7,680{\times}4,320$)과 다채널(~22.2ch) 음질로 극장급의 초고품질 서비스를 제공하여, 소비자의 실감방송에 대한 요구를 만족시킬 수 있는 방송 서비스 제공을 목표로 한다. 본 고에서는 UHDTV 방송을 위한 국내외 관련 기술동향 및 표준화 동향에 대해 살펴보고, 끝으로 UHDTV의 향후전망에 대해 살펴보고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04b
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• pp.499-501
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• 2001

본 논문에서는 사실적인 아바타(avata) 구현의 핵심이라 할 수 있는 입체적인 얼굴 표현을 위해, (※원문참조) 기하학적인 정보를 사용하지 않고 중첩 메쉬를 허용하는 개선된 메쉬 워프 알고리즘(mesh warp algor※원문참조)을 이용하여 IBR(Image Based Rendering)을 구현하는 방법을 제안한다. 3차원 모델을 대신하기 위해 (※원문참조) 인물의 정면, 좌우 반측면, 좌우 측면의 얼굴 영상들에 대해 작성된 메쉬를 사용한다. 합성하고자 하는 (※원문참조) 정면 얼굴 영상에 대해서는 정면 메쉬만을 작성하고, 반측면이나 측면 메쉬는 표준 메쉬를 근거로 자(※원문참조)된다. 얼굴 포즈 합성의 성능을 펴가하기 위해, 얼굴을 수평으로 회전하는 실제 포즈 영상과 합성된 포(※원문참조)에 대해 주요 특징점 들을 정규화 한 위치 오차를 측정한 결과, 평균적으로 양 눈의 중심에서 입의 (※원문참조)리에 대해 약 5%의 위치 오차만이 발생한 것으로 나타났다.

• The Journal of the Korea Contents Association
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• v.11 no.1
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• pp.157-164
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• 2011

Since the movie "Avatar" made world-widely a big success, people's interest to 3D stereoscopic vision has been increasing explosively. However, it is hard to predict that for how long this tremendous attention to 3D stereoscopic would last; consumers have accumulated experience and predominant consciousness from social and cultural environmental various factors. This paper, we will try to see how people interact with 3D stereo through the empirical study. Using Jannett (2009)'s immersion questionnaire, we will measure how different people get immersed while playing game in 3D stereoscopic and 2D.

• Journal of Digital Contents Society
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• v.11 no.3
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• pp.299-306
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• 2010

According to development of Internet and computer graphics technology, Digital fashion technology makes virtual fitting service capable by reappearing of clothes in 3D. In this paper, We suggest that combined solution which you could use virtual fitting service with various device. For example, imaginary mirror(such as digital information display), pc, mobile in different situations such as store, internet shopping market, commercial. Users can experience imaginary mirror that is located in store or 3D virtual fitting service for digital fashion in internet shopping market, mobile application. In addition, We proposed the solution that user can send experienced virtual fitting service results to other person by image file form of MMS.

• Journal of Korea Multimedia Society
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• v.15 no.6
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• pp.827-836
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• 2012

After successful advent of Microsoft's Kinect, many interactive contents that control user's 3D avatar motions in realtime have been created. However, due to the Kinect's intrinsic IR projection problem, users are restricted to face the sensor directly forward and to perform all motions in a standing-still position. These constraints are main reasons that make it almost impossible for the 3D character to navigate the virtual environment, which is one of the most required functionalities in games. This paper proposes a new method that makes 3D character navigate the virtual environment with highly realistic motions. First, in order to find out the user's intention of navigating the virtual environment, the method recognizes walking-in-place motion. Second, the algorithm applies the motion splicing technique which segments the upper and the lower motions of character automatically and then switches the lower motion with pre-processed motion capture data naturally. Since the proposed algorithm can synthesize realistic lower-body walking motion while using motion capture data as well as capturing upper body motion on-line puppetry manner, it allows the 3D character to navigate the virtual environment realistically.

• Convergence Security Journal
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• v.22 no.3
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• pp.19-24
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• 2022

Metaverse is a compound word of the English words 'meta', meaning 'virtual' and 'transcendence', and 'universe' meaning the universe. dimensional virtual world. Metaverse is a concept that has evolved one step further than virtual reality (VR, a cutting-edge technology that enables people to experience life-like experiences in a virtual world created by a computer). It has the characteristic of being able to engage in social and cultural activities similar to reality. However, there are many security issues related to this, and cybersecurity vulnerabilities may occur. This paper analyzes cybersecurity threats that may occur in the metaverse environment and checks vulnerabilities.

• Journal of Korea Game Society
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• v.3 no.1
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• pp.74-85
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• 2003

If the game characters in the cyber world speak the same dialogues as in the real world, it will give game players more fun and realism. And game players are more and more immersed into the cyber space. However, we observed that only simple and primitive dialogues are used at the market places in most MMORPGS. We introduce personality psychology theory for generating the personality of NPC in MMORPG. And we suggest how to make a conversation between PC (Playable Character) and NPC (Non - Playable Character) according to 'Extroversion - Introversion dimension' and 'Neuroticism dimension'. And we implement the personality dialogue generation program, which is composed of two parts. One is for generating personality, and the other for making dialogue. Personality generator can set a NPC's personality automatically, and Dialogue Maker can control the dialogue styles, quantities, and characteristics of NPC. Thus, the program implemented in this paper can help game designer and scenario writer to make game characters easily. The approach in this paper can be applied to generate various game characters and used to represent agents and avatars of real-time animation.

• The Journal of the Convergence on Culture Technology
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• v.2 no.3
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• pp.15-22
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• 2016

The purpose of this study is to propose improvements for 3D garment simulation system by comparison with the difference between real garment and 3D garment simulation of women's jacket. The process of the study was to take pictures on the standard sized subject wearing the jacket of basic size, to get a avatar from body sizes of the subject, and to obtain images of 3D garment simulation on the avatar. The appearance evaluation was resulted by the method of a questionnaire survey after presenting the images to 24 members of patterner and 22 members of designer. On that appearance evaluation by designer group, perform comparative analysis of differences between the real garment and the 3D garment simulation of women's jacket. On that appearance evaluation by patterner group, perform comparative analysis of differences between the real garment and the 3D garment simulation of women's jacket. There were the differences on 4 areas: 1 questions of the side, 1 questions on the back, 7 questions on the sleeve, and 1 questions on the collar, and the results showed that the 3D garment simulation was preferable on each question.

• Journal of the Korean Institute of Intelligent Systems
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• v.19 no.1
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• pp.1-5
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• 2009

This paper suggests to apply mirror-reflected method based 2D emotion recognition database to 3D application. Also, it makes facial expression of fuzzy modeling using probability of emotion. Suggested facial expression function applies fuzzy theory to 3 basic movement for facial expressions. This method applies 3D application to feature vector for emotion recognition from 2D application using mirror-reflected multi-image. Thus, we can have model based on fuzzy nonlinear facial expression of a 2D model for a real model. We use average values about probability of 6 basic expressions such as happy, sad, disgust, angry, surprise and fear. Furthermore, dynimic facial expressions are made via fuzzy modelling. This paper compares and analyzes feature vectors of real model with 3D human-like avatar.

• Journal of KIISE:Computing Practices and Letters
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• v.13 no.6
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• pp.412-416
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• 2007

In this paper, we present a haptic virtual exhibition space that allows users to interact with 3D graphic objects not only through the sense of sight but also through the sense of touch. The haptic virtual exhibition space offers users in different places some efficient ways to experience the exhibitions of a virtual musical museum using the basic human senses of perception, such as vision, audition, and touch. Depending on 3D graphic objects, we apply different properties to let those feel realistic. We also provide haptic device based navigation which prevents users from rushing between various interfaces: keyboard and mouse. The haptic virtual museum is based on Client-Server architecture and clients are represented in the 3D space in the form of avatars. In this paper, we mainly discuss the design of the haptic virtual exhibition space in detail and in the end, we provide performance analysis in comparison to other similar applications such as QTVR and VRML).