• The Journal of Korean Institute of Communications and Information Sciences
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• v.25 no.10B
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• pp.1821-1831
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• 2000

In this paper we propose a new adaptive stereo object tracking system that can extract the object from the complex background and foreground noises by using the image-based SAD algorithm and control the convergence angle and pan/tilt of cameras by using optical BPEJTC. From the experimental results the proposed stereo tracking system is found to track the object adpatively under the circumstance of complex and changing background noises and the possibility of real-time implementation of the proposed system by using the optical system is also suggested.

• Proceedings of the Korean Society for Cognitive Science Conference
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• 2005.05a
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• pp.228-232
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• 2005

최근의 연구에서 Li. Brenner, Cornelissen과 Kim (2002)은 추적 눈 운동 동안의 2차원 모양지각이 망막에 형성된 이미지 내용을 그대로 반영한다는 것을 보여 주었는데, 이러한 연구는 2차원 모양판단에 있어서 눈 운동 정보가 전혀 고려되지 않았음을 시사한다. 이와 같은 실험실 연구와 달리, 실제 생활에서 2차원 모양지각의 왜곡은 대부분의 경우에 발생하지 않는데, 가능한 한 가지 이유는 실험실 연구에서 사용된 자극의 경우에 참조대상이 존재하지 않는데 비하여, 실제 생활에서는 다양한 참조대상이 목표대상의 주변에 존재하기 때문이다. 목표대상과 참조대상의 상대적인 위치관계는 추적 눈 운동 동안에 망막에서도 그대로 유지되는데 시각체계가 이러한 안정적인 관계를 목표 대상의 모양을 지각할 때에 이용할 가능성이 있다. 본 연구에서는 다양한 참조대상을 이용하여 이러한 가능성을 검증하였다. 특히, 피험자의 눈 운동을 눈 운동 측정기를 이용하여 측정하였으며, 적절한 눈 운동을 수행한 시행에서의 데이터만 분석에 사용하였다.

• 한국신재생에너지학회:학술대회논문집
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• 2009.06a
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• pp.61-64
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• 2009

본 논문에서는 단축과 2축 회전형추적시스템의 장점을 가진 시간 제어 극축회전형(Chronological Polar axis tracking) 태양광추적발전시스템에 대한 연구결과를 보여주고 있다. 천체 망원경의 별 추적 방식과 같은 시간 제어 극축 회전 방식으로 태양 추적방법의 정밀도를 높이면서 제어를 간소화하였고 계절 변화에 따른 태양 남중고도의 변화를 패널이 동시 추적 가능하도록 하였다. 향후 집광형태양광발전시스템에 적용가능성을 보였다.

• Proceedings of the Optical Society of Korea Conference
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• 2008.07a
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• pp.393-394
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• 2008

컴퓨터 그래픽의 분야에서 Global illumination을 계산하는 과정은 우선 광선 추적 기법을 기반으로 한다. 가장 늦게 소개되어 사용자 층이 늘어나고 있는 photon mapping 기법도 scene rendering을 수행하기 이전에 광선 추적을 이용하여 photon의 공간적 분포를 미리 계산하는 과정을 활용한다. 본 고(稿)에서는 광학용으로 사용되는 SW를 scene rendering에 활용할 수 있는 가능성을 검증하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.3 no.2
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• pp.389-396
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• 1999

In this paper, we propose a multiple underwater object classification and tracking algorithm using the narrowband tonal and frequency line features extracted from the frequency spectrum of the acoustic signal. The general algorithm using the wideband and narrowband energy has a high tracking error when objects are close and cross each other. But the proposed algorithm shows a good tracking performance for the simulation scenarios generated by the real acoustic data.

• Journal of Korea Game Society
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• v.20 no.2
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• pp.91-100
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• 2020

Life-and-death problem in Go is a fundamental problem to be overcome for implementing a computer Go. To solve it, an important consideration is to find out who surrounds or is surrounded between black and white players. To figure out the boundary between black and white groups, we applied an influence function and a contour tracing algorithm. We found that applying the Moore-neighbor tracing among various contour tracing algorithms can create boundaries, and also suggested the possibility of tremendously reducing the search space of a game tree.

• Journal of the Korea Society of Computer and Information
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• v.17 no.11
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• pp.83-91
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• 2012

Authentication schemes preserving user anonymity have first been proposed by Das et al, and most of user anonymity schemes provide user anonymity against outside attacks in the communication channel. In this paper, according to the increasing of personal information exposure incidents by server attack, we propose a new authentication scheme that provides user anonymity against server as well as one against outside attacks in the communication channel. Furthermore, the proposed authentication scheme provides traceability that remote server should be able to trace the malicious user and it also solves the problem of increasing computational load of remote server by solving weakness of wrong password input by mistake.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.9
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• pp.2139-2144
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• 2013

This paper has analyzed the possibility about implementation of the low-cost, high-efficiency tracking antenna using flat panel antenna. Tracking antenna is consisted of four flat-antenna, comparators, tracking receiver, controller. We analyzed input signal of antenna array about the magnitude and phase of radio wave. In addition, We suggested the available tracking range through the analysis of output signal. We have minimized the error rate that happened on two path through design two path of the azimuth and elevation. Analysis results has a tracking range of ${\pm}3$ degrees, it is possible to implement.

• The KIPS Transactions:PartD
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• v.16D no.2
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• pp.201-212
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• 2009

There are various methods to trace output in software development to verify the consistency and completeness of requirements. Existing studies do present the trace meta-model or automated tools, but fail to list specifically traced output or traced items. Also, in regards to trace tables, which contain traced items, existing studies don‘t consider the whole software development process but merely its sub-process. Given this, the present study suggests an extended requirements tracetable that tracks output from the inception of the project through the architectural design phase to the application delivery, following up on the researcher’s previous study on a tracetable that considered only a sub-process of the whole development process. In addition, in order to address the problem of the tracking process becoming complicated with increased tracefields due to an extended trace table, the researcher suggests a method for normalizing a requirements tracetable that can integrate and separate by development process phase. Apply it to theH system development project of a D company, and this study caseverified application possibility of study, confirmed an effect of a chase to easily find out an error of requirements. Improve precision of a traceto verify consistency of requirements and completeness through this study, and will minimize failure of a software development.

• Korean Journal of Cognitive Science
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• v.16 no.3
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• pp.175-188
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• 2005

Recently, Li, Brenner, Cornelissen and Kim (2002) reported that 2D shape perception during pursuit eye movement just reflected the retinal image, and this result implies that the visual system ignored the extra-retinal information. In reality, however, we usually do not experience the perceptual distottion of 2D shape during pursuit eye movement. One Possibility is that the visual system night exploit the fact that the relative location between objects on retinal image is constantly maintained even during pursuit eye movement. The present research examined this possibility. Interestingly, perceptual distortion of 2D shape was observed even in the presence of reference, however, the amount of distortion decreased compared to when the reference does not exist. The distance between the reference and the target affected the perceptual distortion. These results imply that reference information is used in 2D shape perception during pursuit eye movement but it cannot completely explain the stable and accurate representation of 2D shape perception during pursuit eye movement.