• Proceedings of the IEEK Conference
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• 2000.09a
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• pp.385-388
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• 2000

본 논문에서는 영상처리 기법 중 하나인 이진 영상에 대한 골격화를 이용한 새로운 형상 기술자를 제안한다. 내용기반 영상 검색에서 형상을 이용하는 것은 가장 우세하고 인간이 가장 쉽게 인지할수 있는 방법 중의 하나이다. 형상을 이용한 검색을 위해 서는 인간이 인지하는 형상에 대한 정보를 간략화시킬 수 있는 기술자가 필요하다. 본 논문에서 제안하는 골격을 이용한 형상 기술자는 물체의 중요한 정보 중 하나인 골격을 영상 검색에 이용함으로써 기존의 물체가 갖고 있는 복잡한 형상 정보들을 여러개의 직선의 조합으로 간략하게 표현하고 이를 검색에 사용하는 것이다. 이를 위해서 단순한 골격화 외의 다른 형태학적 영상 처리를 이용하여 효과적인 직선 추출을 위한 여건을 마련한다. 그리고 근사화된 직선들이 추출되면 스케일에 대해 정규화 하여 골격을 이루는 직선들의 양 끝점을 형상 기술자로 얻을 수 있다. 각 특징벡터에 대한 정합은 각각의 회전에 대해 유클리디안 거리를 이용한다. 실험 결과, 제안된 방법이 자세한 부분보다는 대략적인 형상 검색과 동일한 카테고리의 데이타 집합에서 부분적인 변화에 대해 우수한 성능을 나타낸다는 것을 알 수 있다.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2007.05a
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• pp.250-253
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• 2007

It is known that fine straightness of micro-wire can be obtained by removing residual stress induced during the manufacturing processes. Generally, residual stress is removed or minimized through several drawing processes with heat treatment. In this study, the residual stress at each straightening process is calculated and monitored by finite element analyses and the main reason of stress change is investigated.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2004.10a
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• pp.83-88
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• 2004

Micro wires manufactured by the straightening progress are widely used in bio-medical and semi-conductor fields. In this study, we have developed a novel straightener which uses the direct heating method for straightening. In order to avoid the surface oxidization, during the heating process, we supplied the inert gas(Ar) and examined the effect of the gas flow rate. The effect of the tension and the current applied to the tungsten micro wires were thoroughly studied. From various experiments, it was found that when the tension is $500{\sim}600gf$ and the current is about 1.5A, we obtained higher straightness(${\approx}1{\mu}m/1000{\mu}m$) and roundness ($<{\pm}2{\mu}m/100{\mu}m$).

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.535-536
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• 2012

본 논문에서는 물체가 가지고 있는 다양한 형태의 직선 외형을 검출하기 위한 효율적인 알고리즘을 제안한다. 직선 외형의 검출은 물체를 인식하거나 물체에 대한 필요 정보를 취득하고자 할 때 기본적으로 활용될 수 있는 핵심적인 알고리즘이다. 제안하는 알고리즘에서는 이진화된 입력 영상에 대하여 수직 프로젝션을 수행하여 관심영역을 추정한다. 이후 관심 영역 내 주요 경계점 들 간의 적합한 변위를 계산하고 이를 통하여 효율적인 직선 외형을 검출하고자 하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.918-920
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• 2011

In this paper, a simple edge pattern classification method is proposed for detecting straight line segments in an image corrupted by impulse noise. Corrupted images have complicated edge patterns. To detect straight line from an complicated edge pattern, it is needed to simplify the entire edge. The proposed algorithm separates the entire edge into 4 directional partial edge patterns. Each line segment is separated from the partial edge image where several line segments are overlapped, and then the straight line is detected. The results of the experiments emphasize that the proposed algorithm is simple but accurate.

• Journal of Industrial Technology
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• v.24 no.A
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• pp.17-22
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• 2004

In the study, we have developed a straightening system for 304 micro wires that are normally used in the medical and semi-conductor fields. To apply heat to the micro wires, we introduced the direct wire heating method which generates the thermal energy by the electrical resistance of the wire itself. To avoid the deterioration of the wire surface by the environment, such as the oxidation or the hydration, the $N_2$ gas was filled in the glass pipe in which the straightening process was being performed. A precision tension meter was also attached to control the tension of the wire during the heating and straightening process. In order to control the straightening process, several experimental investigations with varying the tension, the feeding velocity and the temperature (current) was carried out. As a result of experiments, we obtained the optimal processing conditions satisfying the straightness requirement of the micro wires.

• Korean Journal of Food Science and Technology
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• v.24 no.3
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• pp.226-231
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• 1992

A generalized linearization model for stress relaxation curves of vegetative tissues was proposed as $[F_{(o)}t^n/(F_{(o)}-F_{(t)})=k_1+k_2t]$, taking into account internal structure changes under a constant strain. Where $F_{(o)}$ is the initial force, $F_{(t)}$ is the decaying force after time t, and $k_1$, $k_2$ and n are constants. This model was well fit to stress relaxation curves of a variety of raw and processed fruits and vegetables.

• The Transactions of the Korea Information Processing Society
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• v.5 no.8
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• pp.2203-2212
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• 1998

본 논문에서는 정규화 과정을 통해 2차원 물체를 인식하는 방법을 제안하고자 한다. 이를 위해 우선 입력 영상에 톨이론을 적용하여 화상구조를 파악함으로써 임계치 선정없이 잡음 제거와 경계 추출을 행한다. 그 후 추출된 경계선에 Hough 변환을 이용하여 직선과 원을 추출하여 여기에 프리미티브의 안정성에 기초하여 물체를 이루는 프리미티브에 대한 분리를 행한다. 최종적으로 분리된 프리미티브들로부터 모양 정도를 계산하고 디지털화 과정을 통해 인식 과정을 수행한다. 끝으로 본 논문의 유용성을 실험에 의해 입증하고자 한다.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.30 no.9 s.252
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• pp.1148-1153
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• 2006

This paper deals with the effect of the direct heating method(DHM) for straightening the micro wire. Straightened micro wires have been widely used in the fields of the medicine and the semi-conductor. We have developed a micro wire straightening system by using the direct wire heating method. To controling the tension of the micro wire during the heating and straightening process, a precision tension sensor was set up. In order to avoid the surface oxidation during the heating process, the argon inert gas was supplied to the vicinity of the wire. And, this paper shows the correlation between the tension and the current when arson gas supplied to the tungsten wire. Through several experiments, the optimal tension and current were found. Also, higher straightness $({\approx}1{\mu}m/1000{\mu}m)$ and roundness$(<{\Phi}{\pm}2{\mu}m/100{\mu}m)$ founded when $500{\mu}600gf$ tension and 1.5 ampere.

• Journal of Software Assessment and Valuation
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• v.17 no.2
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• pp.151-159
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• 2021

To derive grid lines for analyzing a table layout, line image enhancement techniques are studying such as various filtering or morphology methods. In spite of line image enhancement, it is still hard to extract line components and to express table cell's layout logically in which the cutting points are exist on the line or the tables are skewing . In this paper, we proposed a line tracking algorithm to extract line components under the cutting points on the line or the skewing lines. The table document layout analysis algorithm is prepared by searching grid-lines, line crossing points and gird-cell using line tracking algorithm. Simulation results show that the proposed method derive 96.4% table document analysis result with average 0.41sec processing times.