• Journal of the Institute of Electronics Engineers of Korea SP
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• v.38 no.3
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• pp.269-281
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• 2001

This thesis deals with a novel font-dependent Hangul recognition algorithm invariant to position translation, scaling, and rotation using circular pattern vectors. The proposed algorithm removes noise from input letters using binary morphology and generates the circular pattern vectors. The generated circular pattern vectors represent spatial distributions on several concentric circles from the center of gravity in a given letter. Then the algorithm selects the letter minimizing the distance between the reference vectors and the generated circular pattern vectors. In order to estimate performances of the proposed algorithm, the completed Batang Hangul 2,350 letters were used as test images with scaling and rotational transformations. Experimental results show that the proposed algorithm are better than conventional algorithm using the ring projection in the recognition rates of Hangul letters with scaling and rotational transformation.

• Journal of the Korean Society of Clothing and Textiles
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• v.31 no.4 s.163
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• pp.633-645
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• 2007

The purpose of this study is to develop brassiere patterns which are both fitting and functional for women aged 19 to 24(the 1924 generation). We suggested a 'size chart for body measurements' for constructing basic brassiere patterns with six sizes of '70, 75', 'AA, A, B cups', which are used most frequently by the 1924 generation consumers. The scope of research was in reference to the statistical analysis results of the Size Korea(2004) body measurements and the results of the data from the preceding research. The 'drafting method for constructing basic brassiere patterns for the 1924 generation consumers' was completed by selecting a total of 18 subjects, 3 for each six sizes in the scope of research, and three wearing tests were carried out with the subjects. We compiled one brassiere pattern in six sizes obtained with the drafting method of constructing a basic brassiere pattern on another by block pattern in order to observe the phase of change in dimensions and shapes of paper pattern. The result was converted into the variations of a x-axis and a y-axis, and we suggested 'Size Grading Rule' and 'Cup Grading Rule' for the basic brassiere patterns. As the results of the wearing evaluation of the basic brassieres and measuring the variation in body dimensions by wearing brassieres, the dimensions and shapes of the basic brassieres suggested in this research proved to be fitting and to have a wearing effect that brings together and supports the breasts.

• Journal of Fashion Business
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• v.13 no.4
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• pp.178-190
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• 2009

The purpose of this study is to make reference for geometric fashion by investigating geometric patterns by linear types and to propose high value added print and fashion design by designing and producing geometric prints and apparel with them focusing on digital textile printing. As a method of the study, visual and textural data were investigated for theory of geometric pattern and fashion design samples were illustrated. The geometric pattern could be defined as abstract pattern which was crossed with straight line or curve. We could group it into three classes such as straight linear, curved, and mixed type. Images varied with linear types. The image of straight linear type was sharp and modern, that of curved one was soft and feminine and that of mixed one was gorgeous and artistic. And then, 3 geometric prints and 3 one-pieces were designed. The concept of design was simple optimism which was based on sixties. Target was young optimistic women group from the mid teens to the mid twenties who continued to seek after their unique individuality keeping their modern lifestyle. Geometric patterns with straight linear, curved, and mixed type were designed and dresses which went well with them were designed and produced. According to the result of this study, images of geometric fashion can be represented diversely by varying linear type, digital textile printing is good method for high value added geometric fashion because of its high quality and degree of sensitivity, and geometric pattern is a good source for contemporary fashion.

• Fashion & Textile Research Journal
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• v.25 no.3
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• pp.315-323
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• 2023

In the diverse modern era, individuals are actively striving to develop and demonstrate their capabilities . As a means of cultivating interest in hanbok and differentiatedabilities , there exists a national qualification verification for hanbok technician. This study focuses on using Saekdong-jeogori pattern that is suitable for design and allows for accurate pattern production in a short time for beginners taking the practical test for hanbok technicians. We analyzed five experimental Saekdong-jeogori patterns, from which the final patterns for research were derived through appearance tests on the first table evaluation and the second outfit evaluation. The Saekdong-jeogori pattern-1 for research utilized the body values presented by beginners taking the hanbok technician qualification verification, while the rest were calculated or applied using equivalents. The godae point and armhole depth were calculated based on the chest circumference, and the armhole curve, sleeve shape, doryeon line, and sleeve-end were drawn, regardless of the changes in the figures, using equal parts. The Saekdong-jeogori pattern-2 provided activity by vertically lowering the side line from the end of the armhole, and the keotseop line was drawn by moving 1 cm from the width of the Kit to the armhole line. The seopko was raised 0.2 cm from the keotseop reference line and0.2cm , and was supplemented by its connection to a natural curve.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.8 no.4
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• pp.130-135
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• 1999

The main scale of linear encoder greatly effects on the precision of displacement measurement. Especially when needing the long range measurement the length of main scale should be increased accordingly. In this paper we propose a linear encoder that uses laser interference pattern as main scale for long range measurement. The linear encoder is similar to Michelson interferometer excepting that the reference mirror is tilted so as to obtain interference fringe pattern and a grating panel is attached on a quadratic photo diodes. Four kinds of grating having phase difference of 0. $\pi$/4, $\pi$/2, 3$\pi$/4 are arranged on the panel. The experimental results show that signals of quadratic photo diode A, B, {{{{ {-}atop {A } }}}} and {{{{ {- } atop {B } }}}} are cosine wavelike and successive signals have phase difference of $\pi$/4 each other. So the proposed method can achieve improved measurement resolution.

• Structural Engineering and Mechanics
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• v.12 no.2
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• pp.189-200
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• 2001

This paper presents an experimental modal analysis of perforated rectangular plates in air or in contact with water. The penetration of holes in the plates had a triangular pattern with P/D (pitch to diameter) 2.125, 2.500, 3.000 and 3.750. The plate was clamped along the plate edges by a number of bolts and nuts. The natural frequencies of the perforated plates in air were obtained by the analytical method based on the relation between the reference kinetic and maximum potential energies and compared with the experimental results. Good agreement between the results was found for the natural frequencies of the perforated plates in air. Additionally, it was empirically found that the natural frequencies of the perforated plate in air increase with an increase of P/D, on the other hand, the natural frequencies of the perforated plate in contact with water decrease with an increase of P/D.

• Proceedings of the KIEE Conference
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• 1991.11a
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• pp.39-42
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• 1991

The Application of Artificial Neural Network(ANN) to forecast a load in a power system is investigated. The load forecasting is important in the electric utility industry. This technique, methodology based on the fact that parallel structure can process very fast much information is a promising approach to a load forecasting. ANN that is highly interconnected processing element in a hierachy activated by the each input. The load pattern can be divided distinctively into two patterns, that is, weekday and weekend. ANN is composed of a input layer, several hidden layers, and a output layer and the past data is used to activate input layer. The output of ANN is the load forecast for a given day. The result of this simulation can be used as a reference to a electric utility operation.

• Proceedings of the IEEK Conference
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• 1998.10a
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• pp.977-980
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• 1998

A real-time holography system using LCD with CCD camera is proposed. In this system, the rainbow hologram is used since it can be reconstructed by white light source. And to record on CCD camera, a kind of in-line holography method is used to widen the width of the fringe pattern. The interference fringe pattern by proposed system is detected with CCD camera and transferred to the LCD A 3-dimensional image is reconstructed when a white light source illuminates the LCD. So it can represent 3 dimensional moving images at real-time. In this paper, to confirm the usefulness of the proposed method, the reconstructed image by holographic film is compared to the same reconstruct image by LCD. In the recording of the interferenced processing, the optimal ratio of the reference and object beam intenstiy is also investigated.

• Proceedings of the Acoustical Society of Korea Conference
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• 1992.06a
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• pp.66-70
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• 1992

This paper describes the simplified DTW algorithm for real time korean digit recognition and construct the digit recognition system using that algorithm. The DTW algorithm which is used nowadays have problems on real time recognition because of its massive computation. But, simplified DTW algorithm, which is proposed in this paper, solved these problems. In the case of single syllable, we use the characteristic of uniform distribution of epansion and contraction on time ais, compare distance of input pattern and reference pattern using constrainedly restricted path. As a result, we can reduce a great deal of computation and achieved that the real time korean digit recognition system.

• Journal of Institute of Control, Robotics and Systems
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• v.12 no.3
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• pp.284-288
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• 2006

In this paper, we apply several pattern recognition algorithms to emotion recognition system with speech signal and compare the results. Firstly, we need emotional speech databases. Also, speech features for emotion recognition is determined on the database analysis step. Secondly, recognition algorithms are applied to these speech features. The algorithms we try are artificial neural network, Bayesian learning, Principal Component Analysis, LBG algorithm. Thereafter, the performance gap of these methods is presented on the experiment result section. Truly, emotion recognition technique is not mature. That is, the emotion feature selection, relevant classification method selection, all these problems are disputable. So, we wish this paper to be a reference for the disputes.