• The Korean Journal of Archival Studies
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• no.33
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• pp.155-206
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• 2012

Interests in archives management are getting expanded from the public sector into the cultural and artistic field for the ten years after legislation of "Act on the Management of Public Archives" in 1999. However, due to lack of recognition on the importance of archives in the cultural and artistic field, it is rather frequent that information is kept scattered or archives are lost. As an example, absence of precise contract documents or notes of bestowal keeps people from locating great amount of cultural properties, and because of it these creative properties are in the risk of thefts, the closed-door auctioning, or trades in unofficial channels. As how a nation manages cultural and artistic creation inside the nation reflects its cultural level, it can be said that one of the indexes to notice the extent of a nation's cultural level is to take a look at how they are circulated. This study started from this point. Growing economy and rising interests in culture and art made the society more cognizant of the importance and value that visual artworks have, but the archives and information which are showing the context of these artworks and are produced in the course of social interaction are relatively disregarded because too much emphasis lies on the work itself. It is harder to find archives or documentations in Korea than in other advanced countries about the artists themselves or philosophical discourse on the background of the artworks. There is not so much interest to preserve the archives and information produced after the exhibition also, and they are used for no more than promotion or reference. Hereupon, the researcher recognized the importance of visual arts archives and believed that systemic management on them are high in need. And metadata is an essential way for the systemic management, as recently management on artworks or their archives are conducted using the system of the agencies even though they are not produced electronically. The objective of this study is to manage visual arts archives systematically by designing a data model reflecting traits of visual arts archives. Metadata are needed in the every course of archives from acquisition to management, preservation and application. Visual arts archives find its rich value only when a systemic relationship is established among information on artist, artwork and events including exhibition. By establishing a Multiple Entity Data Model, in which artworks, artists and events (exhibitions) make relationship all together, metadata for management on visual arts archive gets more efficiency and at the same time explanatory trait of the archive gets higher. For this reason we, in the study, tried to design a data model by setting each as an independent entities and designating relations between them, in order to find a way to manage visual arts archives more systematically.

• Journal of KIISE
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• v.43 no.7
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• pp.795-800
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• 2016

In image classification, recent CNNs compete with human performance. However, there are limitations in more general recognition. Herein we deal with indoor images that contain too much information to be directly processed and require information reduction before recognition. To reduce the amount of data processing, typically variational inference or variational Bayesian methods are suggested for object detection. However, these methods suffer from the difficulty of marginalizing over the given space. In this study, we propose an image-text integrated recognition system using active vision based on Spatial Transformer Networks. The system attempts to efficiently sample a partial region of a given image for a given language information. Our experimental results demonstrate a significant improvement over traditional approaches. We also discuss the results of qualitative analysis of sampled images, model characteristics, and its limitations.

• The Journal of the Korea Contents Association
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• v.13 no.1
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• pp.64-72
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• 2013

In this study, we contemplated types, essence, characteristics of text data which is material for visual expression of text visualization part of data visualization research and also analysed the multidirectional means of expressive approach for it. Studies of text visualization are spread dramastically under the influence of computer development, open data, wide use of visualization tools, etc. For these reasons, text visualization works have been creating as art works or output of research through various inter-discipline convergent research with engineering, art, humanities, sociology, etc. Nevertheless the theoretical studies on text data itself and its visualization, and also systematic analysis of its approach are rarely made. Data is target of understanding and interpretation, and it has infinite information and possibility with process and approach for it. Considering the attainable status of data in future human society, text visualization which is convergent academic field of study starting with understanding and interpretation of data needs further methodological research and theoretical accumulate.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.383-385
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• 2007

웨이블릿 화상 코딩 기법은 자연적으로 레이어드된 비트스트림을 생성해 내기 때문에, 주파수 제한적인 채널 상황에서 에러에 강한 성능을 나타내고 있다. 본 논문에서는 Progressive Image Coder의 성능을 비교하고 평가하는 새로운 기법인 시각적 엔트로피를 이용해, 웨이블릿 영역에서 시각적인 가중치를 이용해 정량화하려고 한다. 이 시각적인 가중치는 주파수 영역과 공간 영역에서, 인간의 시각 체계(HVS, human visual system)에 기반 하여 만들어진 것으로, 웨이블릿 계수들의 코딩 순서를 결정하는 기준으로 사용되고, 이렇게 해서 시각적인 화질을 개선할 수가 있다. 정규화된 채널 용량이 0.3일 때, 전송 이득은 시각적 엔트로피로 측정해 보았을 때 23% 이상 얻을 수 있다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.8 no.2
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• pp.13-26
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• 1998

시각암호는 비밀화상을 share라 불리는 암호화된 형태로 분산하는 방법으로서n명의 참여자로 이루어진 잡합 p에 대하여, 각 참여자는 share로 구성된 슬라이드(transparency)를 한장씩 부여받는다. 참여자들의 인가된 부분집합은 슬라이드를 중첩시켜 시각적으로 비밀정보를 복원할 수 있지만, 다른 부분집합은 비밀 정보를 복원 할 수 없다. 이 방법은 비밀정보를 복원라기 위하여 인간의 시각 체계를 이용하므로 컴퓨터를 사용한 복잡한 연산이 필요 없는 이점이 있는 반면에 복원화상의 휘도가 손실되는 단점이 있다. 이논문에서는 참여자의 계층화를 고려한 (2, n) VCS(Visual Cryptography Scheme)를 구성하기 위한 새로운 모델을 제안하고 계층적 접근구조에 의해 휘도를 개선하는 방법을 보인다. 제안하는 방법의 효율을 평가하기 위하여 (2, n) VC로 재구성되는 화상의 휘도를 분석한다. 또한 그 응용으로서 한 장의 슬라이드로 사용자와 시스템 사이에 상호식별이 가능한 메카니즘을 제시한다.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04b
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• pp.604-606
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• 2000

본 논문에서는 인간의 시각 특성을 고려한 시각 적응적 DCT 영상 압축 방법이 제안되었다. 인간의 시각 체계의 특성 중 복잡한 영사이나 대비효과(contrast)가 큰 부분에서는 압축과정에서 발생한 왜곡이 쉽게 눈에 인지되지 않는 특성을 갖는 공간적 마스킹(spatial masking)을 이용하여 영상의 질을 어느정도 유지하면서 적응적 압축 방법에 의해 압축율을 보다 높이는 방법을 제시하였다. DCT 변환 블록에서 경계영역 정보를 많이 포함하는 부분을 추출한 후 이 영역은 다른 영역에 비해 복잡도가 더 높고 경계성분의 대비효과가 더 크기 때문에 이 영역의 분산을 취해 이 값에 따라 적응적으로 양자화한다. 실험결과, 제안된 영상 압축 알고리즘은 기존의 시각 적응적 압축 방법보다 좋은 성능을 보이며 특히 고주파 성분을 많이 가진 복잡한 영상에 대하여 높은 압축률을 보였다.

• Journal of Korea Multimedia Society
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• v.15 no.9
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• pp.1174-1183
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• 2012

This study, depending on the diversification of the information environment, was carried out to analyze the role of visual cues and the relationship between visual information structure in the process of user's visual immersion and recognition. Thus, we design evaluation model which used scientific instruments and subjective evaluation taking into account the latest graphical user trends, and analyze the data of immersion and recognition of the user experience that acquired through the process more systematic experimental procedure. Based on this, in the future, this study will be able to contribute implement the latest broadly applicable to the device of graphical information user basic design model and a standard evaluation model.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.13 no.2
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• pp.34-41
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• 2014

The purpose of this study is to present the improvement of connection system between traffic information centers for reliable traffic information service. We recognized traffic information error caused by too much time in conjunction between traffic information centers, lack of reliability of traffic information caused by absence of generation time and generation institution of traffic information. We presented minimization methods of connection time, improvement methods of reliability of traffic information and development methods of connection state management system.

• Journal of KIISE:Computing Practices and Letters
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• v.6 no.5
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• pp.487-495
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• 2000

Information Feature Visualization integrates the traditional information retrieval techniques and visualization techniques and reduces the time and effort from searching for requested information by promoting apprehension from the wide and various internet information. It's used to understand the related information tendency by supporting the statistic materials for retrieved results. It's useful to catch a tendency regarding information over the search process. Recently, by increasing interest in the information visualization in the library system, The research about various visualization technology and searching system has been developed by many researchers. So, to describe systematically and visually the feature of information, we'll make the element of information visualization uniform by various views and suggest paradigm renewing retrieval technology using information outlining techniques by developing search tool to improve apprehension about information and navigate more easily among information. We can improve user's apprehension about search information and search more usefully.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.6
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• pp.929-934
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• 2018

The Internet of Things (IoT) is the network of devices embedded with electronics, software, sensors, actuators, and connectivity which enables these objects to connect and exchange data without any human intervention. The importance of time information is increased in order to impose order on scattered sensor data streams, resolving conflicts through time stamp information and so on. Time information and time synchronization are critical building blocks in the IoT. They allow devices to share a consistent notion of time and it is easier to build efficient and robust collaborative services. This paper proposes a standard time management scheme in the Internet of Things. Many IoT applications involve collection and forwarding of event data. It is useful to know when an event occurs for the purposes of triggering an action. In order to verify the feasibility of the proposed scheme, it is implemented and evaluated in the Arduino development environment.