• Journal of Korea Multimedia Society
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• v.21 no.7
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• pp.764-771
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• 2018

In this paper, we propose a high-quality image acquisition algorithm using only a single image, which the high-quality image is normally referred as HDR ones. In order to acquire the HDR image, conventional methods need many images having different exposure values at the same scene and should delicately adjust the color values for a bit-expansion or an exposure fusion. Thus, they require considerable calculations and complex structures. Therefore, the proposed algorithm suggests a completely new approach using one image for the high-quality image acquisition by applying statistical difference and histogram manipulation, or histogram specification, techniques. The techniques could control the pixel's statistical distribution of the input image into the desired one through the local and the global modifications, respectively. As the result, the quality of the proposed algorithm is better than those of conventional methods implemented in commercial image editing softwares.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2009.01a
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• pp.346-350
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• 2009

Digital Multimedia Broadcasting (DMB) is the mobile TV service based on a digital radio transmission system that provides high quality audio/video and other auxiliary data services. As users want to store the DMB content in their device to be consumed later or to be shared among users, a standardized format needs to be specified to guarantee the interoperability for the DMB contents for various devices. DMB AF (Application Format) specification defines a file format for DMB contents and services. It specifies how to combine the variety of DMB contents with associated information for a presentation in a well-defined format that facilitates storage, interchange, management, editing, and presentation of the DMB contents in protected, governed, and interoperable ways. In this paper we present our implementation of DMB AF as part of the development of DMB AF reference software. Our implementation of DMB AF is developed as the reference software for the standard specification that consists of a three applications: packager, media player, metadata browser and collection of supporting libraries used by the applications.

• Journal of Korea Game Society
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• v.18 no.3
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• pp.39-48
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• 2018

The composition of the 'The Game Story' should reflect the game play and development environment. To do that, I borrowed a coordinate format called 'Spatio-temporal Coordinate Array' that was not based on text-based storytelling. I wanted to create a way for the story to describe relationship between 'action' based on time and 'object' based on space. One way to do this was to analyze the concepts using a mystery game in which Spatio-temporal Array is a large role in user's decision-making. As a result, I found that the method -Spatio-temporal coordinates- was an editor containing game play, and a setting tool capable of being used as a conceptual diagram.

• Journal of Korea Multimedia Society
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• v.22 no.6
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• pp.716-728
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• 2019

This study explores the concept of spectacular realism. and finds out how spectacular realism is made in movies. The Movies's spectacle is a realistic spectacle that does not miss the reality. so audiences can immerse themselves in it. Nowadays the spectrum of visual realism is becoming very diverse. "Perceptual realism" means to feel more like real than to reproduce reality as it is. "Synthetic realism" is a realism that CGI makes. And "Spectacular realism" makes the spectators concentrate to images than narrative or character. It means the dominance of the visual. The films and showed "Spectacular realism" especially in the aerial battle scenes. The films use 'Presentation of a new spatial sensation using unusual angles', 'Editing that constitutes transcendental time' and 'Intense contrast' as methods to embody spectacular realism. And the harmonious arrangement of transcendental images and very realistic screens effectively embodies Spectacular Realism. This discussion, which began in the air battle scene, could contribute to a broader and more diverse exploration of the implementation of spectacular realism images in the future.

• Journal of Korea Multimedia Society
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• v.21 no.11
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• pp.1342-1352
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• 2018

Voice Command systems are important means of ensuring accessibility to digital devices for use in situations where both hands are not free or for people with disabilities. Interests in services using speech recognition technology have been increasing. In this study, we developed a mobile writing application using voice recognition and voice command technology which helps people create and edit documents easily. This application is characterized by the minimization of the touch on the screen and the writing of memo by voice. We have systematically designed a mode to distinguish voice writing and voice command so that the writing and execution system can be used simultaneously in one voice interface. It provides a shortcut function that can control the cursor by voice, which makes document editing as convenient as possible. This allows people to conveniently access writing applications by voice under both physical and environmental constraints.

• Journal of Korea Multimedia Society
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• v.24 no.4
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• pp.558-568
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• 2021

The digital image to be accepted as legal evidence, it is important to verify the authentication of the digital image. This study proposes a method of authenticating digital images through three steps of comparing the file structure of digital images taken with iPhone, analyzing the encoding information as well as media logs of the iPhone storing the digital images. For the experiment, digital image samples were acquired from nine iPhones through a camera application built into the iPhone. And the characteristics of file structure and media log were compared between digital images generated on the iPhone and digital images edited through a variety of image editing tools. As a result of examining those registered during the digital image creation process, it was confirmed that differences from the original characteristics occurred in file structure and media logs when manipulating digital images on the iPhone, and digital images take with the iPhone. In this way, it shows that it can prove its forensic authentication in iPhone.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06b
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• pp.576-579
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• 2008

본 논문은 NAND 플래시 메모리를 기반으로 한 멀티미디어 휴대 장치에서 동영상 파일을 고속으로 편집하고 동시에 필요한 저장 공간 소모를 최소화 하는 기법을 제안한다. 동영상 파일 편집 후 저장에 있어서 현재의 NAND 플래시 파일 시스템들은 편집 내용을 빈 공간에 새로 저장하기 때문에, 대용량의 파일일수록 많은 시간과 저장 공간이 소모 된다. 본 논문에서 제안하는 기법은 동영상 편집 후 파일 간에 중복되는 데이터를 새로 저장하지 않고 공유하도록 하면서 소모되는 시간과 공간을 최소화 한다. 이를 위해 파일 간 공유 되는 데이터를 관리하는 페이지 공유 맵을 설계하고 이를 이용한 동영상 고속 편집저장 기법을 제시한다.

• Proceedings of the Korea Contents Association Conference
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• 2003.05a
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• pp.67-73
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• 2003

The cyber-education is fully recognized and proliferated such as to Internet language centers or virtual universities, and so on. However, the acquisition of e-learning tools as well as the construction of educational contents are quite difficult tasks. Therefore, in this study, important information for the acquisition of hardwares such as multimedia editing tools, servers, educational facilities is suggested, and the critical success factors for the acquisition of cyber educational solution softwares such as authoring tools and loaming management systems are proposed.

• Proceedings of the IEEK Conference
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• 2000.06e
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• pp.214-217
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• 2000

To help the blind to find the information easily on World Wide Web, this research has tried to develop the device which enables us to convert HTML for the general into HTML for the blind. This program consists of the items as follows: 1. Web Robot to gather the internet browser and the general HTML. 2. Restoring DB by Parsing process 3. Multimedia editor for the use of web DB to add the literal and acoustic description to the editing function. 4. Convertor which gathers the DB and then changes into HTML for the blind. This project is designed to make it easy for the manager to establish the web site for the blind. We expect that this program will basically help the blind to overcome the inequality in the common information.

• Proceedings of the KIEE Conference
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• 2007.04a
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• pp.17-19
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• 2007

This paper describe an interactive video object segmentation tool which can be used to generate MPEG-4 video object planes for multimedia broadcasting and enables content based functionalities. In order to apply these functionalities, each frame of video sequence should be represented in terms of video objects. Semiautomatic segmentation can be thought of as a user-assisted segmentation technique. A user can initially mark objects of interest around the real object boundaries. Then the user-guided and selected objects are continuously separated from the unselected areas though time evolution in the image sequences. We proposed method shows very promising result and this encourages the development of object based video editing system.