• Journal of KIBIM
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• v.11 no.4
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• pp.1-9
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• 2021

Comparing to general scanning data, the 3D digital map for large construction sites and complex buildings consists of millions of points. The large construction site needs to be scanned multiple times by drone photogrammetry or terrestrial laser scanner (TLS) survey. The scanned point cloud data are required to be registrated with high resolution and high point density. Unlike the registration of 2D data, the matrix of translation and rotation are used for registration of 3D point cloud data. Archiving high accuracy with 3D point cloud data is not easy due to 3D Cartesian coordinate system. Therefore, in this study, iterative closest point (ICP) registration method for improve accuracy of 3D digital map was employed by different overlap ratio on 3D digital maps. This study conducted the accuracy test using different overlap ratios of two digital maps from 10% to 100%. The results of the accuracy test presented the optimal overlap ratios for an ICP registration method on digital maps.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.8
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• pp.1849-1854
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• 2010

As for information system in hospital which digital hospital aims at, there are PACS(Picture Archiving and Communication System) and soon. PACS transfer and store various medical pictures which are occurring in hospital. The various medical pictures is captured by using keyboard or foot switch during a surgical operation. In this paper, foot switch USB module that can be mounted into a main foot switch case is designed and implemented, it is having a MCU circuit with a built-in micro-controller and a I/O interface having a maximum of five switch. we also developed foot switch control software program with various functions. The result of using the module in the hospital field confirms that the module operates safely.

• Journal of Biomedical Engineering Research
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• v.15 no.2
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• pp.175-182
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• 1994

The international standard for digital compression and coding of continuous-tone still image known as JPEG (Joint Photographic Experts Group) standard is investigated for medical image archiving and communication. The JPEG standard has widely been accepted in the areas of electronic image communication, computer graphics, and multimedia applications, however, due to the lossy character of the JPEG compression its application to the field of medical imaging has been limited. In this paper, the JPEG standard is investigated for medical image compression with a series of head sections of magnetic resonance (MR) images (256 and 4096 graylevels, $256 {\times}256$size). Two types of Huffman codes are employed, i. e., one is optimized to the image statistics to be encoded and the other is a predetermined code, and their coding efficiencies are examined. From experiments, compression ratios of higher than 15 were obtained for the MR images without noticeable distortion. Error signal in the reconstructed images by the JPEG standard appears close to random noise. Compared to existing full-frame bit-allocation technique used for radiological image compression, the JPEG standard achieves higher compression with less Gibb's artifact. Feature of the progressive image build-up of the JPEG progressive coding may be useful in remote diognosis when data is transmitted through slow public communication channel.

• Journal of the Korean Society for Library and Information Science
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• v.46 no.2
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• pp.83-113
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• 2012

This research seeks to develop preservation metadata and to provide guidelines to apply PREMIS-METS decisions in a METS profile in the National Library of Korea. The process of developing metadata is divided into three steps, that is, analysis of metadata schema in other digital preservation initiatives, analysis of resources and preservation policies, and interviews with librarians in the National Library of Korea. A metadata schema consists of four main entities - object, event, agent, and rights. The study also provides a cataloging example as well as principles using PREMIS-METS for archiving digital resources. The schema has values to manage digital resources effectively and efficiently in the National Library of Korea.

• Journal of the Korean Society for information Management
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• v.25 no.3
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• pp.5-25
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• 2008

Individuals and organizations in the modern society produce diverse digital objects everyday, which are not only valuable information resources at present but also will be invaluable digital heritage for the future generation. TRAC(Trustworthy Repositories Audit & Certification: Criteria & Checklist) is one of the evaluating tools against which digital archives could be assessed for their preparedness to perform the task of long-term preservation. The current study uses TRAC to assess OASIS(Online Archiving & Searching Internet Source). The results show that the web archive has a greater room for strengthening in the object management infrastructure than in organizational and technical infrastructures.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.6C
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• pp.824-833
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• 2004

Due to the bandwidth and storage limitations, medical images are needed to be compressed before transmission and storage. DICOM (Digital Imaging and Communications in Medicine) specification, which is the medical images standard, provides a mechanism for supporting the use of JPEG still image compression standard. In this paper, we explain a method for compressing medical images by JPEG standard and propose two methods for JPEG compression. First, because medical images differ from natural images in optical feature, we propose a method to design adaptively the quantization table using spectrum analysis. Second, because medical images have higher pixel depth than natural images do, we propose a method to design Huffman table which considers the probability distribution feature of symbols. Therefore, we propose methods to design a quantization table and Huffman table suitable for medical images. Simulation results show the improved performance compared to the quantization table and the adjusted Huffman table of JPEG standard. Proposed methods which are satisfied JPEG Standard, can be applied to PACS (Picture Archiving and Communications System).

• Journal of Korean Library and Information Science Society
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• v.47 no.4
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• pp.359-384
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• 2016

This study aims to develop digital archives for honam catholic history institute. To achive the goal, this study considers historical archives of honam catholic history institute. Also, this study proposed an effective archiving method based on OSS(open source software) for contents collection, management, preservation and service. Archiving of local cultural contents can contribute to the local development along with cultural industry policy. This study performed interview with people in charge of management of archives to extract general requirements for implementation of local archives. With the results, this study limitations of current archives management and considerations of implementation of local archives. This study proposed a method to effectively solve the limitations through the processes.

• Journal of the Korean Society for Library and Information Science
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• v.58 no.2
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• pp.33-56
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• 2024

In this study, we analyzed the current situation of court libraries and aimed to propose a future-oriented strategy for preserving and managing their collections. Based on literature and status analysis, the study presents the future preservation strategy of court library collections in three main categories: First, securing space for the long-term preservation of court library collections; second, establishing a system for collecting and preserving court library collections; and third, performing digital archiving for the permanent preservation and utilization of court records, valuable legal volumes, administrative materials, and other judiciary-specific resources. Through this, court libraries, including those in various courts, should resolve the issue of insufficient collection storage space, preserve holdings systematically and efficiently, and activate library use.

• Proceedings of the KOSOMBE Conference
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• v.1994 no.12
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• pp.26-27
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• 1994

The first step implementation of a hospital-wide Picture Archiving Communications System (PACS) at a newly built hospital Samsung Medical Center (SMC), is described. Current clinical operation encompasses the fiber optics delivery of direct-interfaced magnetic resonance imager (LRI), X-ray computed tomography (CT). digital subtraction angiography (DSA) and computed radiography (CR) digital images via high performance file server to the departments of radiology, neurosurgery, orthopedics surgery, neurology, emergency room and the surgical intensive care unit.

• Journal of the Korean Society for Library and Information Science
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• v.35 no.1
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• pp.47-75
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• 2001

The purpose of this study is to improve the academic information flow systems in university environment. The study explored various aspects of academic research flow systems, such as national standards and rules for digital library of electronic theses and dissertations, and national information infrastructure for digital data collection, management flow system through networks. Based on the analysis of current situations, the study developed the procedures and systems for digitalizing, collecting, processing, archiving, and providing of graduate research works.