• The Journal of the Korea institute of electronic communication sciences
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• v.6 no.4
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• pp.505-509
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• 2011

Home network system makes it available for controlling inside home and for controlling from outside as well with personal computer, cellular phone or smart phone, by connecting diverse information equipments within home such as lighting, gas, and heating equipments with network. Integrated server and wall-pad, which form home network system, have demerits as saying of being high-priced and of needing to implement network infrastructure. This study suggested the intelligent home network system, which uses smart phone of supplementing these merits of home network system. It substituted high-specification input & output equipment in the currently and widely supplied smart phone for display and touch screen, which are user interface part of the existing wall-pad, and implemented the common wall-pad with low cost by concentrating management and control function of home network on smart phone.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.10
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• pp.1767-1772
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• 2006

Computer-generated integral imaging system is an auto-stereoscopic display system that users can see and feel the stereoscopic images when they see the pre-rendered elemental images through a lens array. The process of constructing elemental images using computer graphics is called image mapping. Viewpoint vector rendering (VVR) method is one of the image mapping algorithm specially designed for real-time graphics applications, which would not be affected by the size of the rendered objects or the number of elemental lenses used in the integral imaging system. This paper describes a new VVR framework which improved its rendering performance considerably. It also compares the previous VVR implementation with the new VVR work utilizing GPU and shows that newer implementation shows pretty big improvements over the old method.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.3
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• pp.587-595
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• 2015

A by-pass path in wireless sensor networks is the alternative path which be able to forward data when a routing path is being broken. One reason of depleting energy is occurred by the path. The method for solving prior to addressed the problem is proposed. However, this method may deplete radio resource. The best path has advantage that network lifetime of sensor nodes is prolonged; on the contrary, in order to maintain the best path it have to share their information between the entire nodes. In this paper, we propose the best path searching algorithm in the distributed three dimensional sensor networks. Through the neighboring informations sharing in the proposed method, the proposed algorithm can decide the best k-path as well as the extension of network lifetime.

• The Journal of the Convergence on Culture Technology
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• v.8 no.3
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• pp.313-321
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• 2022

As 5G is getting developed, people are getting interested in immersive content. Some predicts that immersive content may be implemented in real life such as holograms, which were only possible in movies. Holograms, which has been studied for a long time since Dennis Gabor published the basic theory in 1948, are constantly developing in a new direction with digital technology. It is developing from a traditional optical hologram, which is produced by recording the interference pattern of light to a computer generated hologram (CGH) and a digital hologram printer. In order to produce a hologram using a digital hologram printer, holographic element (Hogel) image must first be created using multi-view images. There are a method of directly photographing an actual image and a method of modeling an object using 3D graphic production tool and rendering the motion of a virtual camera to acquire a series of multi-view images. In this paper, we propose a new method of getting image, which is one of the visual effect, VFX, producing multi-view images using chroma key composition. We shoot on the green screen of actual object, suggest the overall workflow of composition with 3D computer graphic(CG) and explain the role of each step. We expected that it will be helpful in researching a new method of image acquisition in the future if all or part of the proposed workflow to be applied.

• Journal of the HCI Society of Korea
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• v.12 no.1
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• pp.5-13
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• 2017

Interactive intervention of the human presenter is one of the important factors that make the visualization more effective. Rather than just showing the content, the presenter enhances the process of the information delivery by providing the context of visualization. In this paper, we define this as an augmented presentation. In augmented presentation concept, the presenter can facilitate presentation more actively by being fully immersed in the visualization space and reaching and interacting into digital information. In order to concrete the concept, we design presentation space that enables the presenter to be seamlessly immersed in the visualization. Also we increase the presenter's roles as a storyteller, controller and augmenter allowing the presenter to fully support communicative process between the audience and the visualization. Then, we present an augmented presentation system to verify the proposed concept. We rendered 3D visualization through a half-mirror film and a wall projection screen that are place in parallel and applied with stereoscopic images, then, spatially align the presenter inside the virtual visualization space. After that, we conduct a controlled experiment to investigate the subjective level of immersion and engagement of the audience to HoloStation compared to traditional presentation system. Our initial investigation suggests that the newly conceived augmented presentation has potential not only to enhance the information presentation but also to supports the delivery of visualization.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.05a
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• pp.351-354
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• 2011

Home network system makes it available for controlling inside home and for controlling from outside as well with personal computer, cellular phone or smart phone, by connecting diverse information equipments within home such as lighting, gas, and heating equipments with network Integrated server and wall-pad, which form home network system, have demerits as saying of being high-priced and of needing to implement network infrastructure. Also, there is also risk, which is unavailable for controlling equipments inside home, or can cause malfunction of equipments given the occurrence of a problem about integrated server This study suggested the intelligent home network system, which uses smart phone of supplementing these merits of home network system. It substituted high-specification input & output equipment in the currently and widely supplied smart phone for display and touch screen, which are user interface part of the existing wall-pad, and suggest the common home network system by concentrating management and control function of home network on smart phone.

• Journal of Advanced Navigation Technology
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• v.12 no.4
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• pp.317-323
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• 2008

The technical progress of wireless communication in an information-oriented society is heading for the wireless internet service. Handphone is limited in a low capacity memory, size of screen, wireless internet. But it can do service in mobile, nontheless of the time, space. This paper says that online studying in wire internet is capable of servicing in mobile environment. The way of SMS transmission in the agency is linked in the SMS agency, but the way of SMS exclusive modem does service in linking with personal computer. This paper says that the SMS service is possible with SMS exclusive modem, mirroring of the client demand in database.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.830-835
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• 2006

본 연구에서는 바둑을 응용하여, 모바일에서 가능한 6면체 게임으로 구현 하였다. 기존의 바둑과 같은 룰과 비슷한 내용의 게임으로서 모바일 버튼의 단순 조작만으로 가능한 게임이다. 게임에 사용되는 6면체 바둑판과 바둑돌들은 PHOSHOP을 이용하여 3차원 모양의 객체로 생성하였다. 프로그래밍은 SKT GENX기반으로 구현하였다. 기존의 바둑판은 가로 세로 교차된19줄이 평면에 그려져 있으나, 6면체 바둑판은 한 평면에 가로 세로 5줄이 주사위 모양의 6표면에 연결되어있다. 대국 시의 모바일 화면 인터페이스는 바둑판의 6면 중 3면을 동시에 보이는 입체도와 6면을 펼친 전개도가 있다. 입체도는 모바일 버튼 조작에 의해 6면을 상하좌우 회전이 가능하도록 하였다. 입체도와 전개도는 동시에 보는 것을 기본으로 하나 사용자 선택에 의해 두 그림의 크기 위치 등이 다양하게 가능하도록 제공하고 있다. 바둑돌의 착점방식은 모바일 버튼 조작에 의해 커서의 이동으로 가능하다. 게임은 네트워크를 이용한 사람과 사람이 가능하도록 약식으로 구현하였다. 게임의 내용은 6면의 입체적 상황을 고려하면서 작전을 세워야 하므로 기존의 평면바둑에 비해 좀더 고난도의 사고와 전략을 요구하는 게임이다. 그리고 6면체 바둑게임은 모바일 스크린환경에서 기존의19줄 평면바둑이 문제시 될 수 있는 가독성과, 한 게임에 사용되는 시간에 대해서 유리한 요인으로 실용화의 가능성을 제시하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10b
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• pp.24-29
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• 2006

본 연구에서는 기존의 바둑게임을 모바일에 적합한 6면체 표면에서 가능한 게임으로 사용성을 고려하여 구현 하였다. 모바일 버튼의 단순 조작만으로 가능한 게임이다. 바둑이 모바일용으로 대중화 되지 못한 원인인 제한된 스크린에서 가독성의 한계와 게임 소요 시간을 짧게 개선하여 모바일에 적합하도록 하였다. 기존의 평면바둑판을 가로세로 5줄로 주사위형 6면으로 입체화 하였다. 화면 인터페이스는 바둑판의 6면 중 3면이 동시에 보이는 입체도와 6면을 펼친 전개도가 있다. 입체도는 모바일 버튼 조작에 의한 6면을 상하좌우 회전이 가능하도록 하였다. 입체도와 전개도는 동시에 보는 것을 기본으로 하나 사용자 선택에 의해 두 그림의 크기 위치 등이 다양하게 하였다. 바둑돌의 착점방식은 모바일 버튼 조작에 의해 커서의 이동으로 가능하다. 게임은 네트워크를 이용한 사람과 사람이 가능하도록 약식으로 구현하였다. 게임의 내용은 6면의 입체적 상황을 고려하면서 작전을 세워야 하므로 기존의 평면바둑에 비해 좀더 고난도의 사고와 전략을 요구하는 게임이다. 시간성, 이동성, 평면에서 입체공간으로의 발상의 전환 등, 모바일 특성을 고려하여 바둑게임을 구현하고자 한다.

• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.569-572
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• 2008

I proposed wireless ordering system using Qt embedded. This system will make the good use of real life applications and make fit for practical use. I embodied data input, transfer, gathering and back-transfer on wireless network using TCP/IP protocol on QSocket provided by Qt. Server environment is Linux 9.0 and gcc-2.95.3 on PC, and three target-boards consist PXA255 processor with wireless-LAN card which communicate through wireless access pointer. Software tools on target-board are gcc, tmake, qt-X11, qt-embedded and etc. I designed touch-screen interface for user convenience.