• Transactions of the Korean Society of Mechanical Engineers A
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• v.38 no.9
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• pp.1029-1036
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• 2014

Several types of automatic 3D scanners are available for use in the 3D scanning industry, e.g., an automatic 3D scanner that uses a robot arm and one that uses an automatic rotary table. Specifically, these scanners are used to obtain a 3D shape using automatic assisting devices. Most of these scanners are required to perform numerous operations, such as merging, aligning, trimming, and filling holes. We are interested in developing an automatic 3D shape collection device using a spherical-coordinate-based guiding system. Then, the aim of the present study is to design an automatic guiding system that can automatically collect 3D shape data. We develop a 3D model of this system and measuring data which are collected by a personal computer. An optimal design of this system and the geometrical accuracy of the measured data are both evaluated using 3D modeling software. The developed system is then applied to an object having a highly complex shape and manifold sections. Our simulation results demonstrate that the developed system collects higher-quality 3D data than the conventional method.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.11
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• pp.224-229
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• 2018

Korea is experiencing a rapid increase in electricity consumption due to rapid economic development, and many power transmission towers are installed to provide smooth power supply. The high-voltage transmission line is mainly made of aluminum stranded wire, and the wire is loosely guided so that some deflection is maintained. The degree of deflection has a great influence on the quality of the construction and the life of the cable. As the time passes, the shrinkage and expansion occur repeatedly due to the weight of the cable and the surrounding environment. Therefore, periodic monitoring is essential for the management of the power transmission line. In this study, the power transmission lines were monitored using 3D laser scanning technology. The data of the power transmission line of the study area was acquired and the point cloud type 3D geospatial information of the transmission line was extracted through data processing. The length of the transmission line and deflection amount were calculated using the 3D geospatial information of the transmission line, and the distance from the surrounding obstacles could be calculated effectively. The result of study shows the utilization of 3D laser scanning technology for transmission line management. Future research will contribute to the efficiency of transmission line management if a transmission line monitoring system using 3D laser scanning technology is developed.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.10a
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• pp.21-25
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• 2008

최근 측량기술이 발전함에 따라 다양한 지형공간정보를 획득할 수 있게 되었다. 특히 레이저스캐닝 기술의 도입은 정밀한 지형과 식생 및 인공지물 등에 대한 정보를 신속하게 획득하여 원하는 최신 정보를 가공할 수 있게 되었다. 본 연구에서는 라이다의 식생 데이터에서 점의 밀도 분포를 통하여 정량적인 식생분포 분석을 실시하였다. 또한, 정밀한 지형 모델에 대하여 생성되는 라이다 등고선의 효율적인 활용을 위하여 단계별로 필터링을 실시하여 정확성은 유지하면서 저용량의 등고선을 생성하고 도로 및 엔지니어링 분야 활용을 높일 수 있도록 하였다. 이러한 지능적이고 과학적인 연구는 국내 라이다데이터의 적극적인 활용성을 높이고 누구나 쉽게 사용할 수 있도록 하는데 목적이 있으며, 건설 분야뿐만 아니라 생태지도 및 주제도, 재해 환경 분야, 홍수지도, 도시모델링 등 다양한 분야의 활용성을 가능하도록 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.11a
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• pp.609-612
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• 2006

본 연구는 진단용 DNA 칩의 자동판독 시스템을 제안하는 것을 목적으로 한다. 일반적인 자동판독 시스템의 사양을 정의하고 그 구현방법을 제안하였다. 응용 예로서 자궁경부암 진단용 DNA 칩을 대상으로 GenePix 스캐너 프로그램 환경에 적용하였다. 영상획득은 GenePix 의 라이브러리를 사용하여 HTML 언어로 구현하였고, 영상의 판단과 보고서 생성은 Microsoft Visual C++ 6.0를 사용하여 COM 형태로 구현하였다. 결과 보고서는 한글 2002 문서에 환자 정보와 결과 정보 등에 해당하는 곳에 미리 정의된 표지문자열들을 삽입하여 템플릿을 만들었다. 판독 시스템은 템플릿을 읽어들여 처리 결과의 내용으로 표지문자열들을 치환하여 보고서를 생성하였다. 제안한 시스템을 통해서 스캐닝을 통한 영상획득, 영상읠 판독, 결과 보고서 생성으로 구성된 전체 판독과정이 사용자의 개입 없이 자동으로 처리될 수 있었다. 본 시스템은 기존에 수작업을 자동화여 판독 시간을 단축하고 판독 기준을 정량화하여 진단용 DNA 칩이 대량검사 활용되는 공헌할 것으로 기대된다.

• Proceedings of the KIEE Conference
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• 2003.07d
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• pp.2585-2587
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• 2003

한전에서는 전력설비의 효율적인 관리를 위하여 일찌기 배전분야에 GIS를 도입하여 신배전정보시스템(NDIS : New Distribution Information System)을 구축, 시범운영을 마치고 전국에 단계적으로 확대운영하고 있다. GIS를 업무에 활용하기 위해서는 설비도면의 입력이 선행되어야 하나 이를 수작업에 의존할 경우 많은 비용과 시간이 소요될 뿐만 아니라 입력자의 숙련정도에 따라 자료의 정확도가 달라지게 되므로, 이러한 문제점들을 근본적으로 해결하고자 설비의 위치, 심볼, 계통연결, 속성자료 등을 컴퓨터로 자동인식 입력시켜 수작업을 최소화하는 기법 및 적용연구가 필요하며, 특히 국가기본도를 Base Map으로 사용함에 따른 상대오차 보정문제도 해결되어야 한다. 본 개발은 변전소에서 전력수용가까지의 전력공급설비를 나타내는 배전설비도면에서 도면내 주요 설비인 전주와 전선을 인식하는 방법 즉, 반투명 필름에 손으로 그려진 배전설비도면의 스캐닝 영상을 인식기법을 적용하여 설비내용, 설치위치, 전선종류별 설치상태 등 지리정보시스템에서 사용될 정보를 Digital 형태의 Data로 자동생성하고 국가기본도와의 상대오차보정까지 처리하는 것을 주요내용으로 하고 있다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.329-336
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• 2008

Nowadays with advancement in technology and aging society, the number of disabled citizens is increasing. The disabled citizens always need a caretaker for daily life routines especially for mobility. In future, the need is considered to increase more. To reduce the burden from the disabled, various devices for healthcare are introduced using computer technology. The power wheelchair is an important and convenient mobility device. The demand of power wheelchair is increasing for assistance in mobility. In this paper we proposed a robotic wheelchair for mobility aid to reduce the burden from the disabled. The main issue in an autonomous wheelchair is the automatic detection and avoidance of obstacles and going to the pre-designated place. The proposed algorithm detects the obstacles and avoids them to drive the wheelchair to the desired place safely. By this way, the disabled will not always have to worry about paying deep attention to the surroundings and his path.

• The Journal of the Korea Contents Association
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• v.17 no.1
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• pp.740-749
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• 2017

The epigraphy is a text or a picture engraved on metal or stone. One of advantages of rubbing of ancient inscription has been used in epigraphic field is simple. But the rubbing is not an optimal method in viewpoints of resolution and noise to decode the inscribed characters. In this study, we proposed a new research method that increases the possibility of a reading by reflecting the 3D characteristics of the engraved letters. The proposed techniques apply 3D scanning technology to obtain three-dimensional and high quality data of each of the letters in the epigraphy and use Ambient Occlusion visualization techniques to express the shade according to the 3D form of the letters. Research result enhances the readability of the letters that removed the damaged and worn information from the letters information of surface. This research contributes to narrow the scope of a particular letter and read to the controversial letters on the Pohang Jungsoengri Silla Stone Monument(Korea's national treasure number 318).

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.8
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• pp.1759-1764
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• 2012

This paper describes FPGA design and realization using the shading correction algorithm for a CCD scan image enhancement. The shading algorithm is used by LUT (Look-up Table). The image enhancement results from that the histogram minimum value and maximum with respect to all pixels of the CCD image should be extracted, and the shading LUT is constructed to keep constant histogram with offset data. The output of sensor be converted to corrected LUT image in preprocessing, and the converting system is realized by FPGA to be enabled to operate in real time. The result of the experimentation for the proposed system is showed to take the scanning time 2.4ms below. The system is presented to be based on a low speed processor system to scan enhanced images in real time and be guaranteed to be low cost.

• Journal of Korean Society for Geospatial Information Science
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• v.15 no.2 s.40
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• pp.67-75
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• 2007

There are a number of risks in constructing tunnel-structures. Therefore, the precise and rapid observation about inside deformation of the tunnel is required to prevent these risks from occurring and to secure safety. But currently, the real situation is that the crown settlement, cavity deformation and ground surface settlement rely upon the universal mensuration which uses total station or various kinds of measuring instruments. Recently, according to improvement and progress of measuring technology, three-dimensional laser scanning is used as the method to provide data for maintaining structures. It solves the reliability problem of measuring method for the transformational volume of existing structures, provides data that enables to judge visually by three-dimensioning the shape change of structures and makes it possible to deliberate speedy countermeasure. And it can also be efficiently used in the structure maintenance and field measurement.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.11
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• pp.1505-1510
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• 2018

Product modeling technology for graphics is rapidly developing. And 3D data application and usability are increasing.modeling of product design is a very important factor in constructing. 3D modeling in product design takes a lot of production time. Recently, the reverse design method is very useful because of application of 3D data and shortening of production time. In this study, first, 3D point cloud and mesh data are generated using photographs based on image data. The second is to modify the design and the third is to make the prototype with the 3D printer. This product design and production process suggests the utilization and possibility of image data, the shortening of 3D modeling production time and efficient processes. Also, the product design process proposes a model of a new product development system to adapt to the production environment.