• 방송공학회논문지
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• 제8권2호
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• pp.172-180
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• 2003

본 논문은 얼굴 모션 캡쳐 애니메이션을 위한 빠르고 정확한 추출 및 추적 알고리즘을 제안한다. 제안한 알고리즘은 추출 및 추적의 두 단계로 구성된다. 먼저 신경회로망 기반의 영역 병합 기법을 이용하여 입력 영상으로부터 다중 마크를 분리한다. 그 다음, 신경회로망 기반의 추적 알고리즘을 사용하여 각각의 프레임에서 추출된 다중 마크들을 추적한다. 실험의 결과는 추출단계에서는 노이즈를 제거하고 처리 시간을 줄일 수 있었다. 또한 낮은 프레임율에서도 성능이 좋은 추적 결과를 얻을 수 있었다.

• 한국측량학회지
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• 제20권3호
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• pp.235-242
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• 2002

고해상도의 IKONOS 위성 영상데이터로부터 도로 정보를 판독.추출하고 그 정확도를 분석하고자 하였다. RFM을 이용하여 기하보정영상을 생성한 후, 이 영상으로부터 도로를 판독하고 스크린디지타이징 하였다. 도로 판독 및 추출 정확도를 평가하기 위하여 도로 경계선의 위치와 도로 폭을 수치지도와 비교한 결과, 도로 경계선은 $\pm$3.4m, 도로의 폭은 $\pm$1.1m의 정확도로 추출되었다.

• International Journal of Contents
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• 제2권3호
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• pp.27-32
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• 2006

We present an effective algorithm for automatic tracing of retinal vessel structure and vascular landmark extraction of bifurcations and ending points. In this paper we deal with vascular patterns from RGB images for personal identification. Vessel tracing algorithms are of interest in a variety of biometric and medical application such as personal identification, biometrics, and ophthalmic disorders like vessel change detection. However eye surface vasculature tracing in RGB images has many problems which are subject to improper illumination, glare, fade-out, shadow and artifacts arising from reflection, refraction, and dispersion. The proposed algorithm on vascular tracing employs multi-stage processing of ten-layers as followings: Image Acquisition, Image Enhancement by gray scale retinal image enhancement, reducing background artifact and illuminations and removing interlacing minute characteristics of vessels, Vascular Structure Extraction by connecting broken vessels, extracting vascular structure using eight directional information, and extracting retinal vascular structure, and Vascular Landmark Extraction by extracting bifurcations and ending points. The results of automatic retinal vessel extraction using jive different thresholds applied 34 eye images are presented. The results of vasculature tracing algorithm shows that the suggested algorithm can obtain not only robust and accurate vessel tracing but also vascular landmarks according to thresholds.

• Journal of Information Processing Systems
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• 제15권4호
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• pp.931-956
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• 2019

Documents contain information that can be used for various applications, such as question answering (QA) system, information retrieval (IR) system, and recommendation system. To use the information, it is necessary to develop a method of extracting such information from the documents written in a form of natural language. There are several kinds of the information (e.g., temporal information, spatial information, semantic role information), where different kinds of information will be extracted with different methods. In this paper, the existing studies about the methods of extracting the temporal information are reported and several related issues are discussed. The issues are about the task boundary of the temporal information extraction, the history of the annotation languages and shared tasks, the research issues, the applications using the temporal information, and evaluation metrics. Although the history of the tasks of temporal information extraction is not long, there have been many studies that tried various methods. This paper gives which approach is known to be the better way of extracting a particular part of the temporal information, and also provides a future research direction.

• 한국식품영양학회지
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• 제20권1호
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• pp.14-19
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• 2007

본 연구는 커피의 품질에 큰 영향을 미치는 카페인, 산도 등을 알아보기 위하여 생산지별 커피 생두를 로스팅 단계에 따른 명도 차이 및 추출 온도 조건에 따른 pH, 산도, 고형분, 카페인 함량 등에 대하여 조사하였는데 그 결과는 다음과 같았다. 추출온도에 따른 pH는 원산지별, 종류별로 큰 차이를 보이지 않았으며, 산도의 경우 추출온도가 낮을수록 수치가 높게 나타나는 경향을 보였는데, 특히 에티오피아 커피와 인도네시아 커피의 산도가 높게 나타났다. 고형분 함량 변화의 경우 원두 내부의 세포구조가 완전히 팽창되어 있는 상태에서는 추출액이 쉽게 통과하므로 추출온도가 빠르게 떨어지지 않아 고형분의 함량이 증가하는 경향을 보였는데, 커피 중 콜롬비아 커피의 고형분 함량이 전체 추출온도에서 모두 가장 높게 나타났다. 또한 볶은 원두의 카페인 함량에서는 콜롬비아, 에티오피아, 브라질 커피의 함량이 각각 11.19, 12.08, 12.56 mg/g으로 나타났으며, 이는 인도네시아, 베트남 커피의 23.15, 22.36 mg/g보다 2배 정도 낮은 것으로 나타났다. 그리고 추출온도별 카페인 함량을 분석한 결과 낮은 온도에 비해 높은 온도에서 추출할 경우, 카페인 함량이 증가하는 추세를 보였다. 이상의 결과에서 arabica 종인 콜럼비아 커피가 카페인 함량은 적은 반면 향미는 더 풍부하여 다른 품종의 커피보다 맛이 더 좋은 것으로 나타났다.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.1253-1253
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• 2022

Although the construction industry is changing from a 2D-based to a 3D BIM-based management process, 2D drawings are still used as standards for permits and construction. For this reason, 2D deliverables extracted from 3D BIM are one of the essential achievements of BIM projects. However, due to technical and institutional problems that exist in practice, the process of extracting 2D deliverables from BIM requires additional work beyond generating 3D BIM models. In addition, the consistency of data between 3D BIM models and 2D deliverables is low, which is a major factor hindering work productivity in practice. To solve this problem, it is necessary to build BIM data that meets information requirements (IRs) for extracting 2D deliverables to minimize the amount of work of users and maximize the utilization of BIM data. However, despite this, the additional work that occurs in the BIM process for drawing creation is still a burden on BIM users. To solve this problem, the purpose of this study is to increase the productivity of the BIM process by automating the process of extracting 2D deliverables from BIM and securing data consistency between the BIM model and 2D deliverables. For this, an expert interview was conducted, and the requirements for automation of the process of extracting 2D deliverables from BIM were analyzed. Based on the requirements, the types of drawings and drawing expression elements that require automation of drawing generation in the design development stage were derived. Finally, the method for developing automation technology targeting elements that require automation was classified and analyzed, and the process for automatically extracting BIM-based 2D deliverables through templates and rule-based automation modules were derived. At this time, the automation module was developed as an add-on to Revit software, a representative BIM authoring tool, and 120 rule-based automation rulesets, and the combinations of these rulesets were used to automatically generate 2D deliverables from BIM. Through this, it was possible to automatically create about 80% of drawing expression elements, and it was possible to simplify the user's work process compared to the existing work. Through the automation process proposed in this study, it is expected that the productivity of extracting 2D deliverables from BIM will increase, thereby increasing the practical value of BIM utilization.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(3)
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• pp.77-80
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• 2001

In general, the informations of the inner image that user interested in are limited to a special domain. In this paper, as using Wavelet Transform for dividing image into high frequency and low frequency, We can separate foreground including many data. After calculating object boundary of separated part, We extract special features using Color Coherence Vector. According to results of this experiment, the method of comparing data extracting foreground features is more effective than comparing data extracting features of entire image when we extract the image user interested in.

• 산업기술연구
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• 제21권A호
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• pp.141-146
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• 2001

XML is fast emerging as the dominant standard to represent and exchange data in the Web. As the amount of data available in the Web has increased dramatically in recent years, the data resides in different forms ranging from semi-structured data to highly structured data in relational database. As semi-structured data will be represented by XML, XML will increase the ability of semi-structured data. In this paper, we propose an idea for extracting schema in XML document using DTD.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 19-21 Oct. 1992
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• pp.1078-1083
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• 1992

Extracting the process planning information from the CAD data is the key issue in integrated CAD/CAM system. In this paper, we develop algorithms for extracting the shape and setup configuration for NC machining of prismatic parts. In determining the workpart shape, the minimum-enclosing condept is applied so that the material waste is minimized. To minimize the number of setups, feature based algorithm is developed considrint the part shape, tool shape, and tool approach direction. The validity and effectiveness of the developed algorithms were tested by computer simulations.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1999년도 하계종합학술대회 논문집
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• pp.301-304
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• 1999

In this paper, we proposed the new method of extracting the position and the length of the input-line by using only two parameters ($\theta$, $\rho$) from the HT(Hough Transform) data. The computer simulations and the optical experiments by using the HT CGH(Computer Generated Hologram) filter is perfermed. The results are very similar to those of the computer simulation results.