• The KIPS Transactions:PartB
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• v.9B no.2
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• pp.181-190
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• 2002

This paper proposes a motion-video multimedia system needed for computer applications like remote lecturing, distance learning, product demonstrations, and so on. The applications need a multimedia system which can author and play a motion-Video that is composed with computer screen images and audio continuously varing as time flows, not with real motion videos. Since the computer screen images are not like the real world video images in several rejects, MPEG is not competent as a compression algorithm for computer screen images raring continuously In this paper a new compression algorithm has been proposed, and a multimedia system that authors and plays a motion-video file which contains computer screen images and audio has been implemented. Also this paper shows the result of performance evaluation of both the compression algorithm and the multimedia system implemented in the paper.

• The Journal of the Acoustical Society of Korea
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• v.28 no.2
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• pp.85-95
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• 2009

In the binaural synthesis environments, wide varieties of the head-related transfer functions (HRTFs) that have measured with a various direction would be desirable to obtain the accurate and various spatial sound images. To reduce the size' of HRTFs, interpolation has been often employed, where the HRTF for any direction is obtained by a limited number of the representative HRTFs. In this paper, we study on the distortion measures for interpolation, which has an important role in interpolation. With lhe various objective distortion metrics, the differences between the interpolated and the measured HRTFs were computed. These were then compared and analyzed with the results from the listening tests. From the results, the objective distortion measures were selected, that reflected the perceptual differences in spatial sound image. This measure was employed in a practical interpolation technique. We applied the proposed method to four kinds of an HRTF set, measured from three human heads and one mannequin. As a result, the Mel-frequency cepstral distortion was shown to be a good predictor for the differences in spatial sound location, when three HRTF measured from human, and the time-domain signal to distortion ratio revealed good prediction results for the entire four HRTF sets.

• Management & Information Systems Review
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• v.34 no.3
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• pp.197-213
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• 2015

This study is to investigate the effect of the motivation of choosing the tourist spots on the image of the tourist spots and the intention of revisiting targeting the tourists visiting Gamcheon Culture Village. The motivations of choosing the tourist spots, such as experiences, sightseeing, viewing of the cultural events, have a positive (+) effect on the affective image of the tourists. Only sightseeing in the motivations of choosing the tourist spots has a positive (+) effect on the epistemic image of the tourists. With the results of the analyzed effect of the affective image of the tourist spots on the intention of revisiting, it is revealed that the affective image has a significant effect on the intention of revisiting, not the epistemic image. It is suggested that the tourists have a good impression of Gamcheon Culture Village through experiences, sightseeing, viewing of the cultural events. In order for Gamcheon Culture Village to be one of the world-famous tourist spots, many attractions should be provided along with more different experience programs than now, various attractions, alley festivals held throughout the year. With the village developed with the greatest care, the tourists should have the intention of revisiting the village through experiences, sightseeing, viewing of the cultural events with their precious memories, since positive images tourists have tend to be anchored in the affective area rather than in the epistemic one.

• Transactions of the Society of Information Storage Systems
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• v.8 no.2
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• pp.67-71
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• 2012

Page-oriented holographic data storage (HDS) is very sensitive to the tilt error. Therefore, tilt error should be measured and compensated. Especially, mechanical tilt measurement method cannot cope with tilt error measurement because photopolymer medium has shrinkage problem. Therefore, the method to solve this problem is using the reconstructed image which can represent both tilt and shrinkage effect. In this paper, we suggest disc tilt measurement algorithm using image pattern of retrieval data.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2016.06a
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• pp.384-387
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• 2016

본 논문에서는 4K UHD 방송장비 중 디스플레이기기와 인코더의 성능 시험을 위해 개발된 패턴 발생장비를 소개하고 있다. 패턴의 제작 및 재생 방법에 따라 표출되는 패턴의 종류를 그래픽/실사, 정지/동영상으로 구분할 수 있는데 본 논문에서는 모션블러, 모션져더, AV lip sync, 텍스트 주변 인코딩 화질 열화 확인, 화이트 노이즈, 프레임 누락, HDR 확인, 지연시간 측정, 계단현상 확인, 이미지 스티킹 등 그래픽 동영상 패턴에 대해 각각의 제작 의도를 설명하고 이를 통해 디스플레이기기와 인코더의 성능을 평가하는 방법에 대한 간략한 소개와 개발된 패턴발생장비의 입출력 사양을 제시하고 있다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.12
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• pp.5023-5028
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• 2010

In this paper, an image based LED design simulator is proposed to reduce LED design cost mostly contingent on a design expert. Current techniques about LED design schemes have mostly treated text-based LED simulators. The proposed method is to provide novel and easy simulator for LED designers. At first, image filters including histogram equalization, bicubic interpolation. and scaling are employed. Color mapping and special effects are added as well. Experimental results classified into several categories along with running times are shown to validate the proposed methods.

• Proceedings of the KIEE Conference
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• 2000.11d
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• pp.815-817
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• 2000

근래 Web Server의 안정된 운용의 중요성이 급증하는 Network Traffic과 더불어 점차 증대되고 있다. 기본적인 Network 구성망은 Ethernet으로 표준적인 프로토콜은 TCP/IP로 기반을 잡고 있다. 날로 증가하는 Network Traffic을 효과적으로 처리하기 위해서는 Network의 bandwidth 및 서버가 처리할 수 있는 데이터 양을 분석하여 병목현상을 줄이고 데이터의 흐름을 원활히 하기 위한 데이터 buffer들의 설치와 적절한 운영 방법에 관한 연구가 필요하다. 본 논문에서는 Web Server로부터 image 데이터를 전송 받아 이를 원활히 display하기 위한 Application Layer에서의 buffer 크기 및 제어방법에 관한 연구를 수행하고 특히 연속적인 이미지의 전송과 재생에 관한 buffer management에 관하여 고찰한다.

• The Journal of Art Theory & Practice
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• no.10
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• pp.25-46
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• 2010

Street art operates within an already given visual order: the visuality of the modern city in which the regimentation of the image has become fully adaptive to-what Fredric Jameson termed-the logic of late capitalism. What is the relationship between street art and the hegemonic forms of the image dictated by the "city's rulers"? Does street art evoke an alternative kind of spectatorship? Can the unsolicited visual intervention in the life of the city open up an "optics" that resists the reifying patterns of the contemporary gaze? This paper follows Baudrillard's pioneering analysis of graffiti, arguing that the visuality of a certain kind of street images carries an important potential of challenging the hegemonic manner in which the contemporary image has come to dominate the field of vision.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04b
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• pp.403-405
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• 2001

이 연구는 오디오, 비디오, 이미지, 텍스트 등의 다양한 멀티미디어 객체들을 동기적으로 통합하여 표현하기 위한 SMIL(Synchronized Multimedia Integration Language) 표준을 지원하는 GUI 기반 저작도구의 구현에 대한 것이다. 현재까지 멀티미디어 저작을 위한 다양한 인터페이스가 개발되어 왔다. 본 논문에서는 멀티미디어의 논리적인 프리젠테이션 과정을 직관적으로 표현하기 위한 그래픽 사용자 인터페이스를 제안한다. 본 논문에서 제안하는 사용자 인터페이스는 일반적인 미디어객체들 간의 시간관계를 직관적으로 표현하고 편집할 수 있는 아이콘 기반의 인터페이스와, 미디어간의 세부적인 편집을 지원하는 시간기반의 인터페이스, 미디어 객체들의 공간적 재생 위치를 지정하는 배치(layout) 인터페이스 등이다. 이와 같은 다양한 인터페이스를 통합하여 위지위그(WYSIWYG) 방식으로 SMIL파일을 생성할 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.10a
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• pp.441-444
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• 2000

BPA(Black Printer Algorithm)은 잉크젯 프린터에서 사용되는 C(사이안), M(마젠타), Y(옐로우) 잉크에 대한 검정(Black) 잉크의 양을 결정하는 알고리즘이다. CMY 잉크로 인쇄한 이미지의 칼라 품질은 모니터가 재생할 수는 있는 칼라 영역보다 적다. 또한 CMY 잉크를 각각 100% 씩 섞었을 때 이론적으로는 검정 색이 나와야 하나 실제는 검정 색을 정확하게 재현하지 못한다. 그래서 대부분의 프린터는 검정(K) 잉크를 기본으로 제공하며 CMY 잉크로 표현될 회색 영역의 부분을 검정 잉크로 대신 표현해 주기 때문에 프린터의 재현 영역을 확장시킬 수 있다. 또한 검정 잉크의 사용으로 인쇄품질의 색조 대비(contrast)를 증가시킬 수 있고 CMY 잉크를 검정 잉크로 대신 인쇄하기 때문에 CMY 잉크를 절약하는 효과를 얻을 수 있다. 본 논문에서는 본 잉크젯 프린터의 K(black) 잉크와 CMY(cyan, magenta, yellow) 잉크와의 관계를 살펴보았고 이 특성을 이용해 검정 잉크를 조절하는 방법 중에 하나인 3차 다항식의 BPA(Black Printer Algorithm)를 구현하였다. 결과에서는 성능 테스트에 대한 내용과 성능 향상을 위한 방법에 대해 논의하였다.