• ETRI Journal
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• v.36 no.5
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• pp.791-798
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• 2014

As a new hybrid broadcasting service, augmented broadcasting shows enhanced broadcasting content on a large TV screen, while augmented reality (AR) on a mobile device augments additional graphical content onto an input image from the device's own camera to provide useful and convenient information for users. A one-sided broadcasting service using AR has already been attempted in virtual advertisements during sport broadcasts. However, because its augmentation is preprocessed before the video image is transmitted, the viewer at home may have no influence on this formation; and no interaction for the user is possible unless the viewer has a direct connection to the content provider. Augmented broadcasting technology enables viewers to watch mixed broadcasting content only when they want such service and to watch original broadcasting content when they do not. To realize an augmented broadcasting service, the most important issue is to resolve the hybrid content synchronization over heterogeneous broadcast and broadband networks. This paper proposes a novel hybrid content synchronization scheme for an augmented broadcasting service and presents its implementation and results in a terrestrial DTV environment.

• Journal of the Korean Society of Clothing and Textiles
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• v.35 no.4
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• pp.396-407
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• 2011

Various media are expanding the fantastic expression methods and sphere wider than now. As an intermediate for expressing fully self-desires, fashion of the day has surfacing an important concept called fantastic that does not exist and surpasses reality in expressing the ideal body of a desiring body. Goth and cospre are personal expressions of movie costumes that visualize virtual reality as representative of fantastic fashions. The fantastic is a modem concept putting together SF, fantasy, magical realism, fable, and surrealism. Studies in fashion fields related to fantastic have treated fantastic illiberally and peripherally owing to the centering on the SF genre or fantasy. The thesis that dealt with an important fashion as an external favorite as well as the socio-cultural contents of the expressed body in genre expression remains inadequate. In research methods, this study carried out theoretical reviews on the concept and characteristic of the fantastic through literature data that includes local and international theoretical books, monographs, and dissertations that are related to the fantastic. The experimental analysis was executed by collecting fashion works shown after 2000 and included in special fashion editions, collection magazines, Internet materials, and monographs. The results show that the categorization of expression characteristic (according to fantastic spheres) appeared as 5 kinds such as uncanny borderline, cyborg grotesque, heroic superman, myth allegory, and unconscious meaninglessness.

• International journal of advanced smart convergence
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• v.9 no.3
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• pp.192-198
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• 2020

The 3D point cloud is a key technology of object detection for virtual reality and augmented reality. In order to apply various areas of object detection, it is necessary to obtain 3D information and even color information more easily. In general, to generate a 3D point cloud, it is acquired using an expensive scanner device. However, 3D and characteristic information such as RGB and depth can be easily obtained in a mobile device. GNN (Graph Neural Network) can be used for object detection based on these characteristics. In this paper, we have generated RGB and RGBD by detecting basic information and characteristic information from the KITTI dataset, which is often used in 3D point cloud object detection. We have generated RGB-GNN with i-GNN, which is the most widely used LiDAR characteristic information, and color information characteristics that can be obtained from mobile devices. We compared and analyzed object detection accuracy using RGBD-GNN, which characterizes color and depth information.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.385-386
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• 2018

최근 실감형 미디어에 대한 관심이 증폭되고 있으며 제조, 교육, 의료, 국방 등에 분야에서 기존 산업과 융합하여 많은 연구가 진행되고 있으며 MPEG에서도 이러한 실감형 미디어 기술에 대한 자체적인 표준화가 진행 중에 있다. 하지만 실감형 미디어에 대한 제작기술과 디스플레이기술에 대한 이슈는 있으나 콘텐츠 보호에 대한 기술 연구는 활발하게 진행되지 않고 있다. 더구나 실감형 미디어가 최근 웹하드, 토렌트 등에서 불법 유출 되고 있어 이에 대응한 저작권기술연구가 필요하다. 본 논문은 MPEG 산하에서 표준화가 진행되는 실감형 미디어 지원 포맷인 OMAF 구조를 설명하고 이에 대한 기술적 특징을 활용하여 특징점으로 활용될 수 있는 이미지 영역에 대한 선택 방안을 제안한다.

• Journal of the Ergonomics Society of Korea
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• v.31 no.4
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• pp.577-583
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• 2012

Objective: This paper describes the process and results related to the development of gesture recognition-based natural user interface(NUI) for vehicle maintenance e-Training system. Background: E-Training refers to education training that acquires and improves the necessary capabilities to perform tasks by using information and communication technology(simulation, 3D virtual reality, and augmented reality), device(PC, tablet, smartphone, and HMD), and environment(wired/wireless internet and cloud computing). Method: Palm movement from depth camera is used as a pointing device, where finger movement is extracted by using OpenCV library as a selection protocol. Results: The proposed NUI allows trainees to control objects, such as cars and engines, on a large screen through gesture recognition. In addition, it includes the learning environment to understand the procedure of either assemble or disassemble certain parts. Conclusion: Future works are related to the implementation of gesture recognition technology for a multiple number of trainees. Application: The results of this interface can be applied not only in e-Training system, but also in other systems, such as digital signage, tangible game, controlling 3D contents, etc.

• Journal of Broadcast Engineering
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• v.26 no.6
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• pp.680-691
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• 2021

Due to the recent developments of attaining 3D contents by using devices such as 3D scanners, the diversity of the contents being used in AR(Augmented Reality)/VR(Virutal Reality) fields is significantly increasing. There are several ways to represent 3D data, and using point clouds is one of them. A point cloud is a cluster of points, having the advantage of being able to attain actual 3D data with high precision. However, in order to express 3D contents, much more data is required compared to that of 2D images. The size of data needed to represent dynamic 3D point cloud objects that consists of multiple frames is especially big, and that is why an efficient compression technology for this kind of data must be developed. In this paper, a motion estimation and compensation method for dynamic point cloud objects using 3D DCT is proposed. This will lead to switching the 3D video frames into I frames and P frames, which ensures higher compression ratio. Then, we confirm the compression efficiency of the proposed technology by comparing it with the anchor technology, an Intra-frame based compression method, and 2D-DCT based V-PCC.

• Journal of Korean Elementary Science Education
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• v.43 no.3
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• pp.415-432
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• 2024

This study developed and applied the teacher education model and its principles for science classes using Virtual and Augmented Reality (VR/AR) content and analyzed preservice elementary teachers' feedback on the teacher education model and the changes in their perceptions as to the use of VR/AR content. First, existing Technological Pedagogical Content Knowledge (TPACK) teacher education models and prior studies on the use of the VR/AR contents were reviewed to derive the teacher education model to cultivate the VR/AR-TPACK and set the key principles for each of its stages. The developed teacher education model has five stages: exploration, mapping, collaborative design, practice, and reflection. Second, to examine the appropriateness of the model's five stages and principles, we applied it within the regular course of instruction at the university of education, which was attended by 25 preservice elementary teachers. This study collected data from surveys on the perception of the usage of VR/AR contents before and after the course, as well as the group lesson plans prepared by the preservice teachers, and their feedback on the teacher education model. The feedback on the teacher education model and the survey conducted by the preservice teachers before and after the course were analyzed through open coding and categorization. As a result, most preservice teachers expressed positive opinions about the activities and experiences at each stage of the implementation of the teacher education model. Perceptions related to the usage of the VR/AR content changed in three aspects: first, the vague positive perception of the VR/AR content has changed to a positive perception based on specific educational affordance. Second, they recognized the need for preparedness by anticipating potential problems associated with the use of the VR/AR content. Third, they came to view the VR/AR contents as a useful instructional resource that the teachers could use. Based on these results, we discussed the implications for the VR/AR-TPACK teacher education model and assessed the limitations of the research.

• Journal of Korea Society of Digital Industry and Information Management
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• v.10 no.4
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• pp.171-180
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• 2014

Screen golf may be said as one of the most successful digital contents business along with the game industry. The success of the screen golf is because the high tech virtual reality technology is applied to the business in a way that it can meet the five senses of human and that the user can be absorbed into it. In addition, the interaction and playfulness in the screen golf helps the users to get more involved in the game, thus enhancing its value as one of the entertainments. Especially, this study focuses on its interaction and playfulness, which helped the screen golf succeed as a business because they help people to get more absorbed in the game through the communication and fun. From this point of view, the screen golf can be considered to have the best characteristics by which the users can be motivated to use the screen golf. Now along with the public success of the screen golf, the screen golf is recognized as the core field of digital contents. So, the screen golf needs the approaches and researches from multiple points of views, including culture and arts.

• International journal of advanced smart convergence
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• v.11 no.3
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• pp.93-101
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• 2022

Immersion is a features of VR technology, and the most important condition for evaluating VR experience. With the improvement of VR technology, including the presentation accuracy of VR content, the degree of interaction is diversified, the user's immersion in VR equipment should not only be improved technically, but researched from the user's perception level. The paper defines two important factors, immersion and presence, in a participant's experience with a VR device. Although the current technology can already simulate the real environment information visually and audibly, the content of the VR environment is not enough for us to achieve a completely real experience. Based on the Flow theory of Csikszentmihalyi and the sensory immersion achieved by current technology, this paper proposes the key factors of how to achieve conscious immersion for users in VR media. We prove that immersion is an indicator of the true degree of sensory simulation of VR equipment and is the basis for the realization of flow experience. What really makes the participant feel a perfect experience is the content provided by the VR environment and gave participants a sense of presence, it is not limited to video or games. On the premise of the Multi-Sensory, Immersion, Interactivity and Imagination experience achieved by using virtual reality technology, combined with the content creation of flow theory, the interactive immersion achieved by users is an important method to realize the awareness immersion of VR equipment.

• Journal of Fashion Business
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• v.21 no.2
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• pp.1-15
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• 2017

This study aims to identify the special features of high-concept funology observed in fashion products and expressional media by exploring funology in an era of high-concept, the emotional paradigm of the 21st century. High-concept funology in today's fashion can be explained as follows: First, 'virtual reality', which is often seen in fashion shows and fashion commercials, enhances consumer participation and involvement with blurred boundaries between the real world and the virtual world. With the expansion of various forms of real-time communication with consumers, positive images of the brand are being projected to the consumers. Second, 'form transformability', which is often found in fashion products, promotes customers' purchase desire as they are able to present themselves in a more versatile way in the fashion product that is changeable in various designs. Third, 'integration of different fields', which is easily found in various fashion goods, engages consumers in a mutual interaction under an entertaining setting with the product that is made to satisfy their needs attuned to their digital lifestyle. Fourth, 'interactive responsiveness', which is mainly recognized in fashion stores and commercials, is characterized by its interactive playfulness that encourages consumer participation through entertainment contents and promotes brand intimacy, eventually adding more value to its name.