• 전기전자학회논문지
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• 제18권4호
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• pp.536-543
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• 2014

Terrain classification is still a challenging issue in image processing, especially with high resolution satellite images. The well-known obstacles include low accuracy in the detection of targets, especially for the case of man-made structures, such as buildings and roads. In this paper, we present an efficient approach to classify and detect building footprints, foliage, grass and road from high resolution grayscale satellite images. Our contribution is to build a strong classifier using AdaBoost based on a combination of co-occurrence and Haar-like features. We expect that the inclusion of Harr-like feature improves the classification performance of the man-made structures, since Haar-like feature is extracted from corner features and rectangle features. Also, the AdaBoost algorithm selects only critical features and generates an extremely efficient classifier. Experimental result indicates that the classification accuracy of AdaBoost classifier is much higher than that of the conventional classifier using back propagation algorithm. Also, the inclusion of Harr-like feature significantly improves the classification accuracy. The accuracy of the proposed method is 98.4% for the target detection and 92.8% for the classification on high resolution satellite images.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2001년도 The Pacific Aisan Confrence On Intelligent Systems 2001
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• pp.265-271
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• 2001

It is highly for the research in artificial intelligence area to be able to manage knowledge as human beings do. One of the fantastic natures that human knowledge management systems have is being active. Human beings actively manage their knowledge, solve conflicts and make inference. It makes a major difference from artificial intelligent systems. This paper focuses on the discussion of the features of that human knowledge systems, which underlies the active nature. With the features extracted, further research can be done to construct a suitable infrastructure to facilitate these features to build a man-made active knowledge management system. This paper proposed 10 features that human beings follow to maintain their knowledge. We believe it will advance the evolution of active knowledge management systems by realizing these features with suitable knowledge representation/decision models and software agent technology.

• 대한공간정보학회지
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• 제7권1호
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• pp.75-86
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• 1999

3차원 도시 모델은 여러 가지 인공구조물, 자연 지물 요소로 구성되며, 이 중에서 대부분을 차지하고 있는 것은 건물이다. 따라서 건물을 얼마나 정확하고 신속하게 추출하여 기존의 데이터베이스를 갱신할 수 있느냐는 중요한 문제라 할 수 있다. 이러한 문제의 해결 방안으로 DTM으로부터 추출한 건물 정보로 DTM을 재구성한다면, 이를 하나의 3차원 도시 모델로 이용할 수 있다. 따라서 본 연구는 고해상도 DTM과 항공사진의 edge 정보에 수리형태학(mathematical morphology) 및 영상분할 기법 등을 적용하여 건물의 윤곽선 및 높이 정보를 추출하는 것을 목적으로 한다. 본 연구의 결과, 수리형태학의 opening 연산을 통해 건물의 추출이 가능하였으며, 항공사진에서 추출한 edge 정보를 이용하여 건물 추출의 정확도를 향상시킬 수 있었다.

• 한국콘텐츠학회논문지
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• 제14권5호
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• pp.425-435
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• 2014

항공사진이나 위성영상으로부터 건물, 도로 등과 같은 인공지물을 추출하기 위한 연구가 활발히 수행되어 왔으며, 최근 수치항공사진의 해상도가 크게 개선됨에 따라 인공지물 추출 시 종종 원치 않는 잡영들이 검출되곤 한다. 본 연구에서는 이러한 잡영 문제를 보완하고 필요로 하는 대상물을 추출해 내기 위한 목적으로 알고리즘을 개발하였다. 이 알고리즘은 RGB영상의 채널을 분리하고 채널간의 차연산을 수행한 후 각 결과를 이진화하고 잡영제거 및 형태복원을 통하여 경계를 추출하도록 구성되었다. 경계 검출을 수행하기에 앞서 실험에 사용될 수치항공칼라사진에 대하여 광속조정, 수치지형모형 추출, 수치정사사진 생성 및 모자이크 작업 등의 사전처리 과정을 거쳤으며, 이렇게 하여 얻어진 수치정사사진 상에서 소형건물의 지붕경계를 본 연구에서 개발한 알고리즘을 사용하여 추출하였다. 또한 지붕경계 추출 결과를 종래의 방법으로 얻어진 결과와 비교함으로써 알고리즘의 타당성이 입증될 수 있었다.

• Spatial Information Research
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• 제21권5호
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• pp.53-61
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• 2013

본 연구는 영문판 전자지도 서비스를 위한 지명 영문표기의 세부기준과 원칙을 제시하는데 연구목적이 있다. 이를 위하여 국내에서 지명의 영문표기를 위해 활용하고 있는 지침과 국외 전자지도서비스에서의 한국지명의 영문표기 현황을 살펴보았다. 현황조사 결과 국내 외에서 지명의 영문표기방식이 통일되어 있지 않아 혼란을 야기함을 알 수 있었다. 이렇게 혼용되고 있는 지명의 영문표기 방식 중에서 외국인이 이해하기 쉽고 선호하는 표기방식을 파악하기 위하여 외국인을 대상으로 지명의 영문표기방식의 선호도를 조사하였다. 조사결과 외국인은 로마자만 표기하는 것보다는 로마자와 의미역을 병기하는 것을 선호하는 것으로 나타났다. 이러한 선호도 조사 결과를 반영하여 본 연구에서는 우리나라 지명을 자연지명, 인공지명, 행정지명으로 구분하여 각 지명별로 영문표기의 기준과 원칙을 제시하였다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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• pp.14-17
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• 2007

To make use of surveying data obtained from different sensors and different techniques in a common reference frame, it is a pre-requite step to register them in a common coordinate system. For this purpose, we have developed a methodology to register IKONOS-2 Satellite Imagery using ALS data. To achieve this, conjugate features from these data should be extracted in advance. In the study, linear features are chosen as conjugate features because they can be accurately extracted from man-made structures in urban area, and more easily than point features from ALS data. Then, observation equations are established from similarity measurements of the extracted features. During the process, considering the characteristics of systematic errors in IKONOS-2 satellite imagery, the transformation function were selected and used. In addition, we also analyzed how the number of linear features and their spatial distribution used as control features affect the accuracy of registration. Finally, the results were evaluated statistically and the results clearly demonstrated that the proposed algorithms are appropriate to register these data.

• 복식
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• 제23권
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• pp.53-65
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• 1994

The images signifying flight in modern costumes are not made of one characteristic but the combination of complex meanings. Among the distinctive features some of them are as follows. First, the flying styles found in the costumes showed the birds as agents which sent human spirit to the celestial body. By simplifying the images of the wings connecting the present age with the heavenly body, the transforming emotions towards rhythm, direction, and organic curves transcending the real objectively constitutes a new space for expression. Second, colors appeal directly to man's emotions and incites emotional responses. The flying was shown in lines and colors. By using horizontal , vertical, oblique, and spiral lines and contrasted and paralleled colors, man's desire to fly dwells in newly colored space by reflecting speculative emotion through uniting surface. Third, the flying except for the costumes can be found in the advertisement through model's pose and camera technique, the flying itself is described through model's pose, the materials of the costumes, details, and sustaining stuffs. This symbolizes man's wish towards the unknown world vividly and dynamically. As discussed above the spirit of flying was, when expressed distinctively , in accordance with the varying cultural traits and transitions. The shape made by the vitality of symbolizing flying birds and animals along with the flying in the natural aspects such as wind and cloud were reappeared, simplified and symbolized , in modern costumes as consituting a new modeling space.

• 한국산업융합학회 논문집
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• 제17권1호
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• pp.27-34
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• 2014

This paper proposes a new approach to the designed of visual feedback control system based on visual servoing method. The main focus of this paper is presented how it is effective to use many features for improving the accuracy of the visual feedback control of industrial articulated robot for assembling and inspection of parts. Some rank conditions, which relate the image Jacobian, and the control performance are derived. It is also proven that the accuracy is improved by increasing the number of features. The effectiveness of redundant features is verified by the real time experiments on a SCARA type robot(FARA) made in samsung electronics company.

• 건축역사연구
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• 제4권2호
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• pp.25-44
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• 1995

Bricks are the earliest man-made building materials. Small-size bar bricks were found in use in the Warring States Period(戰國時代) in China. During the Qin(秦) and the Han(漢) Dynasties, brick constructions were built on a larger scale, but most of them were tombs. In case of Korea, bricks were found in use in the Three Kingdoms Period, but also most of them were tombs. Starting from the Unified Silla Period(統一新羅時代), brick gradually became a universal practice to built Buddhist Pagodas with bar bricks. Brick pagodas emergence marked a stage where technological progress made it possible for man to built high-rise brick work, and their dvelopment further perfected masonry technique and enabled building technology to attain new heights. Though from the very start brick pagodas existed side by side with stone pagodas, at the enitial stage they were overshadowed by their wooden counterparts and stone counterparts, because masonry thechiques were then still rather primitive, while woodwork and stonework had already reached a fairly advaced stage. The pagodas in ancient Korea were closely related to the Chinese stupa, which consisted of three parts, namely, the base, the body and the spire. The fact was, soon after the stupas were introduced into Korea, the Korean stupas began to develop features of their own. Korean brick pagodas were made up of a single-storeyed square base, multi-storeyed square body with a small gate, and a steel post with several layers of lotus flower superimposed one on the other.

• 복식문화연구
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• 제3권2호
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• pp.201-214
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• 1995

The purpose of this study was to identify the key features of Sokol(蘇骨) and Kolso(骨蘇) and to determined the relation between sokol and kolso. A Comparative linguistical method was used for the analysis of this resarch. Also, sokol(蘇骨) and julpoong(折風) were examined to determine the relationship between the sokol and the julpoong. Results of this study indicated that the sokol and the kolso were identical head covering used by the nobility of Koguryo. The characteristics features of the sokol and kolso were that these tow head coverings wee made of purple ra(羅) and were decorated with gold and silver. The investigation found that the sokol and the kolso were not of Koguryo's native words. These words were derived from this neighboring words. The sokol and kolso were transliterations of neighboring words. The sokol and julpoong were different head coverings: The sokol was for the nobility while the julpoong was for a man of lowly position.