• 방송공학회논문지
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• 제7권2호
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• pp.136-144
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• 2002

본 논문에서는 다양하게 변화되는 캐릭터 영상을 색상과 형태의 정보를 포함한 국부 색상 분포(local color histogram)를 이용하여 유사도 검색을 하는 강인한 방법을 제안한다. 국부 색상 분포의 값을 양자화 하여 특징 값을 최적화하고, 대규모 데이터베이스에 저장되어 있는 영상정보와 Bipartite matching을 이용하여 검색한다. 제안되는 방법은 다양하게 변화되는 영상의 유사도 검색, 동영상 및 정지 영상에서 유사 영상 검색에 매우 효과적인 방법이다.

• 한국소음진동공학회논문집
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• 제25권5호
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• pp.337-344
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• 2015

As many of armored vehicles are seriously exposed to threat of IEDs(Improvised Explosive Devices) in the Afghanistan war and the Iraq war. V-shaped military vehicles are deeply studied in order to protect crews and mounted soldiers against land mines. Generally the experiment on full-scaled V-shaped structure needs excessively high cost, which becomes a huge barrier to study. In this paper, we explore the possibility to make a half-scaled model of the V-shaped structure by using the geometric similarity scaling. We demonstrate the geometric similarity scaling between the original model and the half-scaled model is established on the momentum and deflections of structure via computer simulations and experiments. At this stage, we conduct only numerical analysis of predicting vibration of V-shaped structure because measuring vibration of structure is difficult in the mass-explosion experiment, which is remained as future work.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2021년도 제64차 하계학술대회논문집 29권2호
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• pp.123-124
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• 2021

본 논문은 기존 폰트 디자인을 고찰하여 한글과 라틴 알파벳 디자인의 형태 유사성을 향상시키기 위한 기초 자료를 제공한다. 고찰을 위해 윤디자인 대표 폰트 20종을 선정하였다. 형태적 관점에서 글자 디자인적 유사성을 찾기 위해 낱자, 낱글자, 낱말, 문장을 기준으로 고찰하였다. 윤디자인 대표 폰트 20종의 한글과 라틴 알파벳 글자 디자인의 결과는 다음과 같다. 첫째, 낱자(자소) 디자인은 동일한 형태이지만, 크기와 비례가 변화할 수 있다. 둘째, 낱글자(음절) 디자인은 낱글자 전체의 디자인을 위해 부분적으로 다른 형태를 디자인할 수 있다. 셋째, 낱말(단어) 디자인은 낱말의 우월효과를 고려하여야 한다. 넷째, 문장의 디자인은 글줄의 흐름을 고려하여 글자의 크기, 비례와 기준선을 디자인하여야 한다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 추계종합학술대회 논문집
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• pp.903-906
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• 1998

We propose a new method for merging partical regions which have similar motion characteristics. In the proposed method, the trajectories of each partial regions are computed and the regions consisting a same object are merged by a similarity function defined in this paper. The similarity function is defined to take into consideration the motion characteristics of the trajectories. The proposed method shows good performance when the regions of an object show little variation in size and shape.

• 제어로봇시스템학회논문지
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• 제3권3호
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• pp.305-310
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• 1997

In this paper, a fuzzy set based machine-cell formation algorithm for cellular manufacturing is presented. The fuzzy logic is emoloyed to express the degree of appropriateness when alternative machines are specified to process a part shape. For machine grouping, the similarity coefficient based approach is used. The algorithm produces efficient machine cells and part families which maximize the similarity values.

• 한국정보과학회논문지:데이타베이스
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• 제36권2호
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• pp.73-83
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• 2009

본 논문에서는 영상 내의 객체의 형태(shape)에 기반한 객체 유사성 매칭(matching) 방법을 제안한다. 제안한 방법에서는 객체의 윤곽선(edge)에서 점들(edge points)을 추출하고, 추출된 점들의 위치 관계를 나타내기 위하여 각 점을 기준으로 로그 원형 히스토그램(log polar histogram)을 생성하였다. 객체의 윤곽을 따라가며 각 점에 대한 원형 히스토그램을 순차적으로 비교함으로써 객체간의 매칭이 이루어지며, 데이타베이스로부터 유사한 객체를 검색하기 위하여 사용한 매칭 방식은 널리 알려진 k-NN(nearest neighbor) 질의 방식을 사용하였다. 제안한 방법을 검증하기 위하여 기존의 형태 문맥 기법(Shape Context method)과 제안한 방법을 비교하였으며, 객체 유사성 매칭 실험에서 k=5일 때 기존 방법의 정확도가 0.37, 제안한 방법이 0.75-0.90이며, k=10일 때 기존 방법이 0.31, 제안한 방법이 0.61-0.80로서 기존의 방법에 비해 정확한 매칭 결과를 보여 주었다. 또한 영상의 회전 변형 실험에서 기존 방법의 정확도가 0.30, 제안한 방법이 0.69로서 기존 방법보다 회전 변형에 강인한(robust) 특성을 가짐을 관찰할 수 있었다.

• 한국컴퓨터그래픽스학회논문지
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• 제23권5호
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• pp.19-27
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• 2017

본 논문에서는 두개악안면 CBCT 영상에서 형상제약 정보를 사용한 하악골 자동 분할 방법을 제안한다. 제안방법은 다음의 두 단계로 구생된다. 첫째, MDCT 영상을 사용하여 생성된 통계형상모델을 통해 전역적 형상정보 기반의 하악골 분할을 수행한다. 둘째, 하악골의 지역적 형태 정보 및 밝기값 특징을 고려하여 하악골 분할 개선을 수행한다. 제안 방법의 성능을 평가하기 위해 전문가에 의한 수동 분할 결과를 기준으로 제안방법을 정성적, 정량적으로 평가하였다. 실험결과 큰 곡률로 이루어진 좁은 영역을 포함한 하악골 체부 영역과 위치 변이가 큰 관절구 영역에서 제안방법의 다이스계수(DSC: Dice Similarity Coefficient)는 각각 95.64%, 90.97%를 보였다.

• 복식
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• 제33권
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• pp.217-228
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• 1997

The purpose of this study was to investigate influence of the construction method of the circular skirt on drapability and shape of static silhouette and length variation. In made 24 types of skirts giving the variations (six kinds of peach skin-like finished fabrics two types of cutting method two types of machine stitch method of hem), The results were as follows: 1. Analysis of drapability In the cutting method thre was similarity between warp direction and true bias direc-tion. In the machine stitch method of hem there was similarity between blind stitch and blind stitch machine. According to the fabrics analysis of drapability was excellent in the order N/P 80/20(fabric 1)>P 100(fabric 5)>P 100(fabric 6)>P 100 (fabric 2)>P 100 (fabric 4)>N/C 50/50(fabric 3). 2. Analysis of the characteristics values of static silhouette shape In the cutting method shape of static sil-houette became wide in the warp direction. In the machine stitch method of hem shape of static silhouette became wide in the blind stitch. According to the fabrics shape of static silhouette became most wide in the N/C 50/50(fabric 3) and shape of static sil-houette become most narrow in the P 100(fabric 2,5) 3. Analysis of the length variation In the cutting method the true bias direc-tion was longer than the warp direction. In the machine stitch method of hem there was simi-machine stitch method of hem there was simi-larity between blind stitch and blind stitch ma-chine. In fabrics the P 100(fabric 6) showed the longest the N/C 50/50(fabric 3) showed most slight. Interaction between the cutting and messure-ment part of skirt lengh. In the warp diretion parts that showed longest length variation were C. G, K, O in the true bias diretion parts that showed most slight length variation were A, E, M, I.

• 한국의상디자인학회지
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• 제6권1호
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• pp.55-63
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• 2004

The dress culture of Korea and Turkey should be necessary to study in view of a similar culture of Korea and Turkey due to similarity of oriental culture. Thus, as two nation's dress is investigated, cultural characteristics and dress form of two nations are analyzed with cultural background in detail. Also, comprehension is determinated for the dress color and texture as well as dress culture. In this paper, It is investigated theoretically for the function, type, and class of dress. Also, The form of Korean Po are compared to background of Turkish dress and Sulltans' dress form. To unify a cultural propagation and dress form, technical, inductive contents analytical method as well as literature review are used in positivism. Subject is limited to the Korean Po and Sultans' dress of Turkey. As a results, as the nation's dress reflect to culture and society of the nation, Korean dress have some similarity and differences comparing Turkish dress as followings. In dress form of two nation, rectangular Gil's shape was very similar. Mu's shape was similar too. However, Sultans' dress had outside shape of caftan type and Po had full or partial wrinkles by transforming Mu. Also, Sultans' dress did not have Sup. Korean Po have side slits or back side slits and Jun-Sam but Sultans' dress had only some side slits.

• 대한조선학회논문집
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• 제48권5호
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• pp.445-450
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• 2011

In order to estimate a yacht sail performance, measuring system of aerodynamic forces acting on the yacht sail is constructed and experiments of flexible model sail are carried out at the medium-size subsonic wind tunnel of Chungnam National University. Experimental results for a flexible sail are compared with experimental and numerical results of fixed shape sail. In case of a fixed shape sail, lift and drag coefficients are rarely changed at all velocity conditions. However, those of the flexible sail are decreased as the incoming velocity is increased. These are understandably resulted from shape variations due to the flexible material. Therefore aero-elastic similarity should be more carefully considered in the model test rather than other similarities.