• The Transactions of the Korea Information Processing Society
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• v.1 no.4
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• pp.452-460
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• 1994

Maps are one of the most complicated types of drawings. Drawing recognition technology is not yet sophisticated enough for automated map reading To automatically extract a road map directly from more complicated topographical maps, a very complicated algorithm is needed, since the image generally involves such complicated patterns as symbols, characters, residential sections, rivers, railroads, etc. This paper describes a new feature extraction method based on the human optical neural field. We apply this method to extract complete set of road segments from topographical maps. The proposed method successfully extract road segments from various areas.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.1
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• pp.191-196
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• 2006

This paper presents the moving object tracking method using vision system. In order to track object in real time, the image of moving object have to be located the origin of the image coordinate axes. Accordingly, Fuzzy Control System is investigated for tracking the moving object, which control the camera module with Pan/Tilt mechanism. Hereafter, so the this system is applied to mobile robot, we design and implement image processing board for vision system. Also fuzzy controller is implemented to the StrongArm board. Finally, the proposed fuzzy controller is useful for the real-time moving object tracking system by experiment.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.1
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• pp.197-205
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• 2006

This paper presents the moving object tracking method using vision system. In order to track object in real time, the image of moving object have to be located the origin of the image coordinate axes. Accordingly, Fuzzy Control System is investigated for tracking the moving object, which control the camera module with Pan/Tilt mechanism. Hereafter, so the this system is applied to mobile robot, we design and implement image processing board for vision system. Also fuzzy controller is implemented to the StrongArm board. Finally, the proposed fuzzy controller is useful for the real-time moving object tracking system by experiment.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.21 no.1
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• pp.124-132
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• 1997

This paper describes an experimental and numerical study on growing ductile crack-tip behaviors. The hybrid experimental and numerical method by means of a computer image processign technique, was applied to the analysis of both base metal and weld metal CT specimens. In the weld metal specimen, the initial crack-tip was placed in front of fusion line, and the crack orientation was perpendicular to it. Finite element analysis of crack growth behaviors in both base and weld matal specimens made of A533B Class 1 steel were also performed to examine the effects of weldment on near crack-tip fields. a series of experimental studies on crack-tip behaviors have clearly shown the qualitative effects of material properties, especially a hardening exponent. The experimental and numerical results have also shown that weldment does not affect displacement and strain fields near a crack-tip while a stress field is influenced by the difference between yield stresses of both base and weld metals.

• Proceedings of the Acoustical Society of Korea Conference
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• 1994.06c
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• pp.95-98
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• 1994

자연발화상에 포함되어, 음성언어 인식에 장애를 초래하는 간투사의 음성적 특성 중 가장 뚜렷이 구별되는 길이특성얼 분석하여 음성언어 인식에 도움을 주는 것을 목적으로 한다. 이 연구에서는 간투사의 대부분을 차지하는 단음절 단일 간투사에 한정하여, 실제 대화의 녹음자료에서 나타나는 간투사의 빈도수와, 그 길이특성을 신분별, 성별, 간투사 유형별로 분석하였다. 또 간투사를 위치에 따라, 음운구초 간투사, 음운구말 간투사로 나누고, 그 길이를 음절 평균, 음운 구초 음절이나 음운구말 음절의 길이와 비교하여 간투사의 증가율을 측정하였다. 분석결과 가장 높은 빈도수를 보이는 단음절 단일 간투사는 어 이며, 간투사 길이 증가율은, 음절평균에 대해서는 그가, 음운구초 평균에 대해서는 응이 가장 큰 증가율을 나타낸다. 전체적을 음운구초 음절길이에 대한 간투사 길이 증가율이 음절평균 길이에 대한 간투사 길이 증가율보다 더 크게 나타났다. 이러한 분석결과를 통해 하위레벨에서 제거할 수 있는 간투사와, 통사적 또는 의미론적 분석이 필요한 상위레벨에서 처리해야할 간투사를 구별할 수 있다. 이와 같은 길이 특성외에 간투사에 대한 다양한 음성적 특성과, 다음절 단일 간투사와, 이중 간투사에 대한 연구가 진척된다면 음성언어 인식에 장애가 되는 간투사의 효과적 배제가 가능할 것으로 보인다.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.1997-1998
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• 2011

범용적으로 쓰여지고 있는 id카드를 이용한 출입방식의 경우 카드 분실, 미소지시 또는 손상시 불편함을 초래하며 실질적인 보안의 효과를 기대하기에는 부족한 부분이 많은 실정이다. 또한 전국에 사업장을 가지고 있는 기업의 경우는 보안업체별 소스코드를 공개하지 않음에 따라 id카드를 통일하기 위하여 최초 설치 업체에 종속되는 문제점도 가지고 있다. 그리고 지문인식, 홍체인식 및 정맥인식 등은 출입통제시스템 자체의 단점과 더불어 이용자들의 불편함 그리고 정보수집에 따른 불쾌감을 발생하는 문제점을 가지고 있다. 이러한 단점을 극복할수 있는 얼굴인식 시스템의 경우 다양한 상황에서의 얼굴 검출 및 정보 처리등에 대한 문제점이 있어 정지화상이나 신분증에 화상데이타를 입력하여 비교하는 방법등에 대한 실용화가 많이 되어지고 있는 실정이나 이 역시 id카드가 없으면 출입이 허가되지 않는다는 문제점이 있다. 이러한 문제점을 극복하고 자연스러운 상태에서 인증 및 출입이 허가된다면 가장 이상적이고 경제적인 출입통제시스템 구축이 가능하므로 본 논문에서는 위 문제점에 대한 대안을 제시하고 증명을 통하여 현장에서 충분이 적용될 수 있음을 입증하고자 한다.

• Journal of Korea Multimedia Society
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• v.3 no.3
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• pp.234-240
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• 2000

In this paper, we propose the method in which a stream of multimedia data simultaneously transfers to the main memory and the multimedia processor from the network interface card using a conventional system bus. The proposed method can reduce the input/output time of multimedia data and improve the data stream in the system bus. Also, we compared the number of system bus accesses, bus cycles and data transmission time to the number of participants between the proposed method and the conventional methods in the multi-party video conference systems. The comparison results of performance anticipate that the number of bus accesses of the proposed method was reduced by 50%, and the total transmission time was reduced by 75% as much as the conventional method regardless of the relation of the participant numbers.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.21 no.5
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• pp.835-841
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• 1997

Microscopic examination of the morphology of wear debris is an accepted method for machine condition and fault diagnosis. However wear particle analysis has not been widely accepted in industry because it is dependent on expert interpretation of particle morphology and subjective assessment criteria. This paper was undertaken to analyze the morphology of wear debris for machine condition diagnosis of the lubricated moving surfaces by image processing and analysis. The lubricating wear test was performed under different sliding conditions using a wear test device made in our laboratory and wear testing specimen of the pin-on-disk-type was rubbed in paraffine series base oil. In order to describe characteristics of debris of various shape and size, four shape parameters (50% volumetric diameter, aspect, roundness and reflectivity) have been developed and outlined in the paper. A system using such techniques promises to obviate the need for subjective, human interpretation of particle morphology in machine condition monitoring, thus to overcome many of the difficulties in current methods and to facilitate wider use of wear particle analysis in machine condition monitoring.

• Convergence Security Journal
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• v.6 no.2
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• pp.53-60
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• 2006

In the applications such as CAD or image processing, a variety of geometric objects are manipulated. A polygon in which all the edges are parallel to x- or y-axis is decomposed into simple rectangles for efficient handling. But, depending on the partitioning algorithms, the same region can be decomposed into a completely different set of rectangles in the number, size and shape of rectangles. So, it is necessary an algorithm that compares two sets of rectangles extracted from two scenes such as CAD or image to see if they represent the same region. This paper proposes an efficient algorithm that compares two sets of rectangles. The proposed algorithm is not only simpler than the algorithm based on sweeping method, but also reduces the number $O(n^2)$ of overlapped rectangles from the algorithm based on a balanced binary tree to O(nlogn).

• Journal of the Korea Institute of Information and Communication Engineering
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• v.5 no.4
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• pp.829-840
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• 2001

In this study, we propose a method for quantifying the degree of advance of pulmonary emphysema by using chest X-ray images. With this method, we devise two schemes for this purpose. One is for detecting blood vessels by using a deformable model with the tree-like structure and using an evaluation function specialized by knowledge about blood vessels appeared in chest X-ray images, and the other is for quantifying the degree of advance by using several features, which were extracted from blood vessels, and the equation of quantitative evaluation. In order to evaluate the performance, we applied the proposed method to 189 ROIs(Regions of Interest) of ten chest X-ray images and compared the values by the proposed method with those by a medical doctor.