• Journal of the Korea Society of Computer and Information
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• v.6 no.2
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• pp.14-19
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• 2001

This paper presents a new method of 3-D surface feature extraction using a quadratic pol expression. With a range image, we get an edge map through the modified scan line technique this edge map, we label a 3-dimensional object to divide object's region and extract cent corner points from it's region. Then we determine whether the segmented region is a planar or a curved from the quadric surface equation. we calculate the coefficients of the planar su the curved surface to represent regions. In this article. we prove performance of the metho synthetic and real (Odetics) range images.

• Proceedings of the Korea Contents Association Conference
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• 2014.11a
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• pp.101-102
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• 2014

현재 인간의 감성표현을 위한 수단중의 하나인 음악이 인간의 감성반응을 자극하는데 어떠한 역할과 기능을 하는가에 대한 연구가 활발히 진행되고 있다. 본 연구는 창작자 입장에서 감성 표현 시 음악의 요소들이 어떻게 활용되는지를 분석하고 각 의도된 정서 및 요소가 청취자의 감성반응으로 나타나는지를 연구하였다. 대표적인 음원 사이트인 네이버, 멜론, 엠넷에서 두 달 이상 5위안에 랭크된 곡들을 선정하였다. 선전된 각 곡들을 음악 전문가집단 대상에게 설문 조사하여 각 곡에 사용된 음악적 특징과 분석하고 각 요소 별 감성을 수집하여 연구 분석하였다. 이러한 연구를 토대로 창작자가 의도하는 감성과 청취자의 감성 반응에 대한 상관관계를 밝히는데 유용한 자료가 될 것이다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.26 no.6B
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• pp.810-819
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• 2001

칼라가 물체 인식에 아주 효율적인 단서를 제공하지만 칼라 분포는 시청 조건과 카메라의 위치에 아주 큰 영향을 받는다. 생김새와 모양의 변화에 의한 칼라 분포 변화 문제를 해결하기 위해 본 논문에서는 밝기 값의 변화에 영향을 받지 않고, 색상(hue) 성분에 민감한 칼라 벡터각(color vector angle)을 이용하여 칼라 에지를 추출한 후, 영상의 화소들을 평탄 화소와 에지 화소로 구분하여 칼라 특징 값을 추출하였다. 에지 화소의 경우에는 에지 주위 칼라 쌍의 전체 분포를 HLS 색좌표계의 비균일 양자화를 통해 칼라 인접 히스토그램(color adjacency histogram)으로 표현하고, 평탄 화소의 경우에는 HLS 색좌표계의 비균일 양자화와 칼라 벡터각 균일 양자화를 통해 칼라 벡터각 히스토그램(color vector angle histogram)을 구성하여 공간적인 칼라분포를 표현하였다. 제안한 칼라 히스토그램을 이용하여 영상 검색에 적용하여 성능을 실험한 결과, 작은 빈의 수를 가지는 제안한 방법이 기존의 방법들보다 훨씬 효율적이고, 생김새와 모양의 변화에 아주 강건한 영상 검색이 가능하였고, 기존의 칼라 히스토그램 역투사 방법보다 훨씬 정확한 물체 위치 추정이 가능함을 확인할 수 있었다.

• The korean journal of orthodontics
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• v.29 no.6 s.77
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• pp.707-720
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• 1999

The purpose of this study was to evaluate racial differences In head posture and the influence of head posture to the craniofacial morphology. The sample group of this study was made up of 51 Korean males and 120 Scandinavian Caucasian males. From the comparison of the cranio-cervical angle and the variables of craniofacial morphology between them, the following results were obtained. 1. The cranio-cervical angle (NSL/OPT) was on average 9.28 degrees larger In Koreans. 2. The length of the anterior cranial base (N-S) was on average 4.66mm shorter in Koreans. 3. The length of the maxillary base (sp-pm and ss-pm) were on average 2.75mm and 4.65mm shorter in Koreans respectively, the anterior maxillary height (n-sp) was on average 2.60mm longer, the posterior dimension (s-pm) was found to be 2.06mm longer in Koreans, and the maxillary inclination (NSL/NL) was identical in both samples. 4. The mandibular body length (pg-tgo) and ramus height (ar-tgo) were identical in the two groups, but the genial angle (ML/RL) was 3.22 degrees smaller and the mandibular plane inclination (NSL/ML) was 2.44 degrees larger in Koreans 5. The maxillary prognathism (s-n-sp and s-n-ss) and the mandibular prognathism (s-n-sm) were identical in both samples. 6. The sagittal jaw relationship (ss-n-pg) was 1.44 degrees larger in the Korean sample, but the vortical jaw relationship (NL/ML) was not significantly different. 7. The anterior facial height (n-gn) was 5.57mm longer in the Korean sample. 8. The mandibular alveolar prognathism (CL/ML) was 5.71 degrees greater and the interincisal angle (ILs/ILi) was 3.08 degrees more acute in Koreans. Taken together these results, craniofacial morphology can be influenced by the head posture defined by cranio-cervical angulation.

• Archives of design research
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• v.19 no.1 s.63
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• pp.79-88
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• 2006

A human face figure is a visual symbol of identity. Each different face per person is a critical information differentiating each person from others and it directly relates to individual identity. When we look back human history, historical change of recognition for a face led to the change of expression and communication media and it in turn caused many changes in expressing a face. However, there has not been no time period when people pay attention to a face more than this time. Technically, the advent of computer graphics opened new turning point in expressing human face figure. Especially, a visual image which can be produced, saved, and transferred in digital has no limitation in time and space, and its importance in communication is getting higher and higher. Among those visual image information, a face image in digital is getting more applications. Therefore, 3d (3-dimensional) expression of a face using computer graphics can be easily produced without any professional techniques, just like assembling puzzle parts composed of the shape of each part ands texture map, etc. This study presents a method with which a general visual designer can effectively express 3d type face by studying each producing step of 3d face expression and by visualizing case study based on the above-mentioned study result.

• Journal of Korea Society of Industrial Information Systems
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• v.7 no.1
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• pp.81-88
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• 2002

This paper proposes an extraction method which extracts two different thematic maps, which have different line thickness from each other in a raster image that contains the two thematic maps. In the proposed method, the depth of each pixel is calculated according to the amount of pixels in its surrounding neighborhood, and then the thinning is performed. By using depth threshold, two thematic maps are first extracted from the thinning result. There are noise images and skeleton disconnection in the lines of each extracted thematic map. Each thematic map extraction is finally completed after removing the noise images and connecting the disconnected lines. Through the experiment, we showed that the proposed method could be used for the extraction of each thematic map of a raster image which included two thematic maps.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.3
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• pp.681-687
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• 2000

Ideograph is a truly unifies data and procedural dependencies, Ideograph can be used to assist various program optimization, such as common expression elimination, code motion, constant folding etc. In this paper, we design and implementation of the optimized abstract syntax tree using Ideograph. Ideograph has control flow information and data flow information for source program. So we use a Ideograph in order to produce a optimized Ideograph with control flow information and data flow information.

• Annual Conference on Human and Language Technology
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• 1999.10e
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• pp.79-84
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• 1999

본 연구에서는 문서분류시스템에서 자질의 표현으로 전문분야사전을 이용한 분야정보와 개체정보추출을 통한 개체정보를 이용한다. 또한 지식정보를 보완하기 위해 통계적인 방법으로 범주 전문용어를 인식하여 자질로 표현하는 방법을 제안한다. 문서에 나타난 용어들이 어떤 특정 전문분야에 속하는 용어들이 많이 나타나는 경우 그 문서는 용어들이 속한 분야의 문서일 가능성이 높다. 또한, 정보추출을 통해 용어가 어떠한 개체를 나타내는지를 인식하여 문서를 표현함으로써 문서가 내포하는 의미를 보다 잘 반영할 수 있게 된다. 분야정보나 개체정보를 알 수 없는 용어에 대해서는 학습문서로부터 전문분야를 자동 인식함으로써 문서표현의 지식정보를 보완한다. 전문분야, 개체정보 및 범주전문용어에 기반해서 표현된 문서의 자질에 대해서 지지벡터기계 학습에 기반한 문서분류기틀 이용하여 각 범주에 대해 이진분류를 하였다. 제안된 문서자질표현은 용어기반의 자질표현에 비해 좋은 성능을 보이고 있다.

• Journal of KIISE:Software and Applications
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• v.29 no.6
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• pp.417-424
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• 2002

Automatic text categorization is a problem of assigning predefined categories to free text documents. In order to classify text documents, we have to extract good features from them. In previous researches, a text document is commonly represented by the frequency of each feature. But there is a difference between important and unimportant sentences in a text document. It has an effect on the importance of features in a text document. In this paper, we measure the importance of sentences in a text document using text summarizing techniques. A text document is represented by features with different weights according to the importance of each sentence. To verify the new method, we constructed Korean news group data set and experiment our method using it. We found that our new method gale a significant improvement over a basis system for our data sets.

• The Journal of the Korea Contents Association
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• v.10 no.5
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• pp.144-151
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• 2010

Five Plus One' is a result of visual expressions on five senses such as the sense of sight, hearing, smell, taste, and touch. Although I searched for the data on five senses, there were only information which was quoted in various languages and scientific bases, and also most of the books written were far from artistic expressions including visual pleasure and emotional expressions. In addition, most materials were mainly textbooks for children's intellectual development, academic papers, and medical publications. Therefore, I made this book that makes us to communicate about five senses and an inspiration even though we have a problem to read writings in both Korean and English. I arranged visual elements using illustrations and typography in various ways based on the scientific evidence.