• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 Ⅳ
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• pp.1907-1910
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• 2003

This paper describes a method of stereo image composition for mixed reality without camera calibration or complicate tracking algorithm. The proposed system tracks the panel which has blob makers, and composes virtual objects naturally using the method of texture mapping which is often used in geological computer graphics mapping when we do mapping 2D computer graphic data or man-made 2D images. The proposed algorithm makes it possible for us to compose virtual data even in the case that the panel is bent. For composing 3D object, the system uses depth information obtained from stereo image so that we do not need cumbersome procedure of camera calibration.

• 한국산업보건학회지
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• 제27권4호
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• pp.333-351
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• 2017

Objectives: This study examines the relationships between indoor radon concentrations and distribution from soil geological mapping in the Hwacheon and Jangsu areas. Methods: GIS and a pivot table were used for inquiries about indoor radon contents, soil characteristics, and geological differences. Results: The Hwacheon area was characterized by the presence of normal and reverse faults as a passage of runoff for radon, sufficient occurrences of minerals containing uranium within granite as a radon source, a high concentration of radon within the granite area and clear differences of radon concentrations between granitic and metamorphic areas. The Jangsu area was characterized by the presence of normal faults, wide distributions of alluvium, and ambiguities on radon concentrations indoors among areas of geological differences. Considering the granite area and alluvium surrounded with granite areas, the characteristics of radon concentrations within soils and indoors in the Jangsu area are similar to those of the Hwacheon area. High concentrations are found with entisol and inceptisol in the Hawcheon area, but with entisol, inceptisol, and ultisol in the Jangsu area. High radon concentrations are found in sandy loam and/or loam. High concentrations are found in recently constructed or brick buildings, but low concentrations in traditional or prefabricated houses showing a high possibility of outward flow. Conclusions: The overall results suggest that radon concentrations in the Hwacheon and Jangsu area are dominantly influenced by geological characteristics with additional artificial influences.

• 지질공학
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• 제16권4호
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• pp.327-335
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• 2006

지하 불연속면의 탐지를 위한 굴절법 탄성파 자료에 대하여 3가지의 중요한 자료처리기법을 속도와 심도의 관점에서 비교 관찰하였다. 즉 수치모델링으로 생성된 수평 3층, 경사 3층, 수직단층, 매몰 수직 파쇄대 구조에 대한 발파점 자료들을 일반화된 역행 주시법(GRM), 일반화된 선형 역산법(GLI), 토모그래피를 적용하여 그 자료처리 결과들을 서로 비교 분석하였다. 토모그래피는 수직단층, 매몰 파쇄대등의 복잡한 지형기복에서 보다 정확한 지하속도구조를 파악할 수 있는 반면에 일반화된 역행 주시법(GRM)과 일반화된 선형 역산법(GLI)은 수평구조와 경사 경계면 등의 평면 불연속면에 효과적으로 나타나는데 이것은 이들 방법이 주시곡선의 초동 분석위주로 수행되기 때문인 것으로 해석된다.

• 자원환경지질
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• 제48권5호
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• pp.421-429
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• 2015

지질자원 분야에서 지질도 및 주제도 제작, 조사 및 관측 사업 등은 실용화상용화 목적의 연구개발사업과 달리 장기적이며 계속적인 연구개발의 성격을 가지고 있다. 이러한 장기적, 계속적인 사업의 경우 연구개발의 종료시점을 제시하기 어려워서 사업 평가 시 해당 연구사업의 현재 진행단계를 제시하기 어려운 면이 있다. 이러한 연구개발 분야의 진행 상태를 나타내는 정량 지표를 제시하기 위해, 기존의 실용화 기술에 적용하였던 NASA 기술개발단계(TRL, Technology Readiness Level)를 지질도 및 주제도 제작, 조사 및 관측 사업 등 지질자원 기반 연구개발 분야에 적용할 수 있게 개발하였다. 지질자원 기반 연구개발 분야에서도 적용범위(coverage) 개념을 적용하여 기본원리이해 기획연구(TRL 1)에서 최종 생산물(product)인 특정지역 및 전세계/전국토 정보 구축, 수요자 맞춤형 보급 연구(TRL 9)로 기술개발단계(TRL)를 제시할 수 있다. 그리고 시범적용 등의 실증연구 절차를 가지는 지질환경 등 분야에서도 실용화 성과를 기반으로 기술개발단계(TRL)를 적용할 수 있게 개발하였다. 시범지구 적용 등 실증연구 시작 단계를 TRL 5, 시범지구의 규모 및 적용 개수 확대를 TRL 6, 실제 규모 1/10 수준 시범지구 적용을 TRL 7로 제시할 수 있다.

• 지구물리와물리탐사
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• 제11권4호
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• pp.373-378
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• 2008

현재 전세계적으로 지구과학 분야의 지도제작은 Generic Mapping Tools (GMT) 소프트웨어가 사용되고 있으나, 사용자가 그 내용을 이해하기 쉽지 않고, 마이크로소프트 (MS) 윈도우 PC에서의 구동이 잘 되지 않은 단점이 있다. R언어는 패키지 'GEOmap'을 사용하면 MS윈도우상에서 GMT와 같은 지도작업이 잘 될 뿐 아니라, GMT에 비해 명령어가 이해하기 쉬우며, 명령에 대한 Help 기능이 컴퓨터 상에서 대화형으로 잘 구비되어 있다. 여기서는 'GEOmap'을 이용한 지도제작의 대강을 설명하고, 본 연구팀이 최근 발표한 토모그라피 지도제작에대한 적용례를 소개하였다.

• 대한원격탐사학회지
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• 제2권2호
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• pp.79-94
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• 1986

TM data, which have better resolution in spatial and spectral than MSS data, were used for this study, and several Image Processing Techniques (IPT) were examined for finding the best IPT to fit to lineament extraction and mineralized zone mapping. The Ryeongnam area was selected as test area, because the area is one of major mineralized zones in Korea and its hydrothermal alteration zone is wider and deeper than other areas. The spatial filtering method is most optimum one for limeament extraction: that is, the directional spatial filtering is most efficient to detect N-S, E-W direction lineaments on the image, and the high boost filtering can be applied for mapping all direction lineaments. The ratio method was selected for detecting altered zone. It is possible to make several tens combinations in ratio with 7 bands of TM data, but considering spectral characteristics of each band of TM to the geological meterials and vegetation, the band 4/band 3(A), band 5/band 7(B), and B/A ratio methods were chosen among them. The 5/7 ratio image did not show clearly the altered area due to noise from vegetation cover, so the 4/3 ratio imae was used for trying to decrease the effect of vegetation. As a result the B/A ratio image showed quite nicely the altered zone of the test area. In conclusion, the spatial filtering is the best image processing techniques for lineament mapping, and the B/A ratio image in TM data is useful for the mineralized zone mapping.

• 자원환경지질
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• 제44권4호
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• pp.321-327
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• 2011

창암점 도폭 (1:5만)을 조사하는 과정에서 속초시 서쪽의 미시령 인근에서 반심성암으로 구성된 미시령 병반의 존재를 알게 되었으며, 원래의 병반 모양을 알기 위해 석영장석반암 직 상위에 산점상으로 분포하는 퇴적층에 대한 구조등고선과 단면도를 통한 기하학적 복원을 하였다. 병반의 형성시기는 상기 반암의 관입시기인 $84.4{\pm}1.8$ Ma (SHRIMP)로 고려된다. 삭박되어 잃어버린 백담퇴적분지의 원래 크기는 동-서 폭이 6 km, 남-북 길이가 16 km에 달하는 것으로 산출되었다.

• 디지털산업정보학회논문지
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• 제12권1호
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• pp.27-33
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• 2016

In this study we propose a method for 3D landform reconstruction and object modeling method by generating contour lines on the map using a depth sensor which abstracts characteristics of geological layers from the depth map. Unlike the common visual camera, the depth-sensor is not affected by the intensity of illumination, and therefore a more robust contour and object can be extracted. The algorithm suggested in this paper first abstracts the characteristics of each geological layer from the depth map image and rearranges it into the proper order, then creates contour lines using the Bezier curve. Using the created contour lines, 3D images are reconstructed through rendering by mapping RGB images of the visual camera. Experimental results show that the proposed method using depth sensor can reconstruct contour map and 3D modeling in real-time. The generation of the contours with depth data is more efficient and economical in terms of the quality and accuracy.

• 한국철도학회논문집
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• 제5권2호
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• pp.84-92
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• 2002

For an efficient management and analysis of geological/geotechnical data obtained during site investigations or tunnel construction, Tunnel Information System(TIS) was developed in this study. TIS is running in CIS(Geographical Information System) which has a spatial data. TIS consists of two parts, the Tunnel Face Mapping System(FaceMap), to record a geological features by observations and measurements at the surface of the excavation, the Borehole Data Management System(BDMS), to store the different types of rock data related to boreholes. Using the database of collapsed tunnels, 20 in Korea and 84 in Europe and with an artificial neural network, an expert system was developed for inferring the tunnel collapse pattern and its volume. And by applying Geo-predict, the system developed, in tunnels under construction, observed data from the $\bigcirc$$\bigcirc$tunnl site was compared and analyzed.

• 자원환경지질
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• 제27권6호
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• pp.593-599
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• 1994

Drainage patterns were investigated to interpret the unknown geologic structure and geomorphic history in South Korea. Dendritic and rectangular patterns are most prominent ones developed in the granitic and sedimentary terrain. Drainage density ranges from 0.47 in the Nakdong river basin to 0.31 in the South Han river basin. Fine drainge texture is appeared in the Nakdong basin characterized by sedimentary beds of Mesozoic age, and coarse one are in the South Han river basin where Precambrian metamorphic rocks are dominated. Geological structures interpreted by stream pattern analysis are reasonally good agreement with the result by lineaments analysis and geological mapping.