• International Journal of Fuzzy Logic and Intelligent Systems
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• 제10권1호
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• pp.31-36
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• 2010

Many clustering algorithms have been used in diverse fields. When we need to group given data set into clusters, many clustering algorithms based on similarity or distance measures are considered. Most clustering works have been based on hierarchical and non-hierarchical clustering algorithms. Generally, for the clustering works, researchers have used clustering algorithms case by case from these algorithms. Also they have to determine proper clustering methods subjectively by their prior knowledge. In this paper, to solve the subjective problem of clustering we make empirical comparisons of popular clustering algorithms which are hierarchical and non hierarchical techniques using Silhouette measure. We use silhouette information to evaluate the clustering results such as the number of clusters and cluster variance. We verify our comparison study by experimental results using data sets from UCI machine learning repository. Therefore we are able to use efficient and objective clustering algorithms.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.645-646
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• 2008

Silhouette extraction is widely used in many computer graphics applications. In this paper, we proposed a method for extracting 3D silhouette and internal pattern from 3D vector data. To do this, we first make an edge-list, secondly define the silhouette, and finally remove hidden lines. After getting the silhouette, we extract internal pattern using adjacent edge's dihedral. The proposed method not only effectively improves the performance of extracting 3D silhouette and internal pattern from 3D vector data but also reduces the computational complexity.

• 제어로봇시스템학회논문지
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• 제13권8호
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• pp.749-753
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• 2007

In this paper, a generalized version of the Motion Silhouette Image(MSI) called the Generic Motion Silhouette Image (GMSI) is proposed for gait recognition. The GMSI is a gray-level image and involves the spatiotemporal information of individual motion. The GMSI not only generalizes the MSI but also reflects a flexible feature of a gait sequence. Along with the GMSI, we use the Principal Component Analysis(PCA) to reduce the dimensionality of the GMSI and the Nearest Neighbor(NN) for classification. We apply the proposed feature to NLPR database and compare it with the conventional MSI. Experimental results show the effectiveness of the GMSI.

• 한국지능시스템학회논문지
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• 제17권7호
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• pp.913-918
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• 2007

본 논문에서는 인간과 로봇의 인터액션을 위해 연속된 이미지 정보로부터 얻을 수 있는 색상(color)과 기울기(gradient) 정보를 이용하여 인간 몸의 실루엣 추출 기법을 제안한다. 연속된 이미지 정보로부터 얻어진 RGB 영상 정보에서 색상 배경 제거 기법은 각각의 신체 비율 정보로부터 추출된 모션 영역 정보에서 색상 공판별 평균 이미지 정보를 얻고 옷 색상 정보를 볼록 합하여 계산된다. 기울기 배경 제거 기법은 공간상 정보와 시간상 정보의 볼록 합으로 계산된다. 최종적으로 색상 정보와 기울기 정보의 볼록 합을 하여 인간 몸의 실루엣을 추출한다. 마지막으로, 실험을 통하여 제안된 기법의 성능을 확인하였다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.643-644
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• 2008

Various researches on 3D silhouette extraction have been performed in the area of computer graphic. This paper presents a new method for internal pattern extraction by using an arbitrary region silhouette control technique. The proposed method was tested by using 3D data of stone pagodas. The results show that the proposed method particularly improves the performance of internal pattern extraction.

• 한국지능시스템학회논문지
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• 제15권7호
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• pp.852-857
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• 2005

본 논문은 지능형 로봇 시스템을 위한 인간 몸의 하이브리드 실루엣 추출 기법을 제안한다. 지능형 로봇은 내부적인 진동과 낮은 해상도로 인해 강인한 실루엣 추출을 필요로 한다. 이를 극복하기 위해서 본 논문에서는 하이브리드 실루엣 추출 기법을 제안하였다. 하이브리드 실루엣은 영상간의 공간차 및 시간차 정보를 고려 생성되며 움직임 영역 모델을 통해 두 정보간의 중요성에 가중치를 준다. 최종적으로 실험결과를 통해 제안된 기법의 우수성을 확인하였다.

• 한국컴퓨터그래픽스학회논문지
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• 제7권3호
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• pp.1-7
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• 2001

본 논문에서는 canal 곡면의 투시 윤곽곡선 (perspective silhouette)에 대한 매개변수화 (parametrization) 방법과 윤곽곡선을 이루는 모든 연결된 구성요소 (connected component)를 발견하는 효율적이고 안정성 있는 알고리즘을 제시한다. Canal 곡면은 반경이 변화하면서 이동하는 구 (moving sphere)의 외곽곡면 (envelope surface)이며, 구의 중심점의 궤적을 나타내는 곡선 C(t)와 구의 반경 함수 r(t)에 의해 정의된다. 이동 구는 canal 곡면과 원에서 교차한다. Canal 곡면을 원의 집합으로 분할함으로써, 각각의 원 위에서 주어진 관측점에 대한 투시적 윤곽곡선을 구성하는 점을 계산하여 매개변수화하는 방법을 제시한다. 고정된 중심점 $C(t_*)$와 반경 $r(t_*)$를 갖는 이동 구는 canal 곡면과 하나의 원 $K(t_*)$에서 교차한다. 또한 이동 구를 관측점에서 볼 때의 윤곽곡선도 다른 하나의 원 $Q(t_*)$을 구성한다. 두 원 $K(t_*)$와 $Q(t_*)$가 한 점에서 접하게 되는 t의 값을 구함으로써 canal 곡면에 대한 윤곽곡선을 이루는 모든 연결된 구성요소를 발견하는 효율적인 방법을 제시한다.

• 한국의상디자인학회지
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• 제11권1호
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• pp.155-167
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• 2009

This study reviewed the basic principle of "Maximalism" fashion and analyzed the properties of fashion types with found the frequencies of various styles and design factors of "Maximalism" fashion in collection. The limits of this study is from 2001, s/s, maximalism was embossed in a modem fashion, to 2007, f/w, and collected the fashion collection pictures from www.samsungdesign.net and www.style.com. The results of this study are as follows. First, the most frequent style of "Maximalism" design showed in International fashion collection was "exaggerated style." Second, the design factors of "Maximalism" fashion were also examined. In case of silhouette, "hourglass silhouette" was the most frequent silhouette. In case of pattern, "solid" color was the most frequently used. In case of materials, the soft materials were the most frequently used. Third, the frequencies of design factors of maximalism by presentation types was compared and analyzed. In case of expansion, "bulk silhouette" was the most frequent silhouette to be appeared, and about multi-ethnic, futurelism, and elegance, "hourglass silhouette" was frequent appeared. In case of pattern, "solid" color was the most frequently used in all types. In case of materials, the hard materials were the most frequently used in expansion, multi-ethnic and futurelism. "Maximalism" fashion which is most splendid trend would grow up rapidly in the modem fashion market and influence on the other fashion trend in our every day life. Consequently, this research can be referred as practical information in fashion marketing and it will contribute to the future fashion research as well.

• 복식문화연구
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• 제20권1호
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• pp.49-61
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• 2012

This study focuses on looking at the influence of silhouette in the 1930s on fabric pattern design by comprehending how differently flower-pattern design were found according to clothing silhouette. The period scope of research was limited to 1930s, and the research object was set as the flower patterns seen in the designer's high-fashion and the women's daily apparel as well as the clothes for sports and leisure activities. Based on the above research scope, the researcher investigated the clothing silhouette and the textile patterns in 1930s by reviewing the literature about domestic and foreign books, research papers, domestic and foreign fashion magazines, information on the Internet. A glance at the women's clothing in the 1930s reveals that they emphasized something inactive, elegant, feminine and that great popularity was given to feminine silhouette that closely fitted the body and long and slim, as skirts became longer and longer. Like this, silhouette refused traditional methods in the technique of expressing flower patterns that were on-trend in that period, pursued the freedom of line and form, used shadowing technique by means of free pens and brushes and the effect of watercolors. It also arranged in a semitransparent way and painted contours alone, too. Flower patterns fell into two categories: amorphous abstract patterns and standardized abstract patterns. The patterns expressed themselves, divided into small-scale irregular patterns and abstract geometric patterns that filled the entire textile.

• 복식
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• 제62권7호
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• pp.67-78
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• 2012

This study considered and analyzed the influence of changed clothing silhouettes on the textile patterns by investigating the changes of geometry patterns in response to the changes of western women's apparel silhouette in the 1960s. The period scope of research was limited to the 1960s, and the research object was set as the geometry patterns seen in the designer's high-fashion. The researcher investigated the clothing silhouette and the textile patterns in 1960s by reviewing the literature about domestic and foreign books, research papers, domestic and foreign fashion magazines, information on the Internet. For the western women's apparel in 1960s, some active, simple styles were popular under the social atmosphere when more women actively entered the society. Influenced by popular art trends at that time, the silhouette was expressed in the geometry pattern among many textile patterns. The geometry pattern either appeared as a regularly overall repeating geometry pattern and the regularly partial repeating geometry pattern. The regularly overall repeating geometry pattern arranged the straight lines in the same interval. But the regularly partial repeating geometry pattern was arranged without order to emphasize the motif in some parts of clothing or to give some ornament effect, or was arranged asymmetrically.