• 한국멀티미디어학회논문지
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• 제25권2호
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• pp.421-431
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• 2022

The purpose of this research is to determine the point of fixation of the driver during the process of driving. Based on the results of this research, the driving instructor can make a judgement on what the trainee stare on the most. Traffic accidents have become a serious concern in modern society. Especially, the traffic accidents among unskilled and elderly drivers are at issue. A driver should put attention on the vehicles around, traffic signs, passersby, passengers, road situation and its dashboard. An eye-tracking-based application was developed to analyze the driver's gaze behavior. It is a prototype for real-time eye tracking for monitoring the point of interest of drivers in driving practice. In this study, the driver's attention was measured by capturing the movement of the eyes in real road driving conditions using these tools. As a result, dwelling duration time, entry time and the average of fixation of the eye gaze are leading parameters that could help us prove the idea of this study.

• 한국컴퓨터정보학회논문지
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• 제22권1호
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• pp.1-7
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• 2017

In this paper, we propose an efficient method that is tracking an object in real time using particle filter and adaptive observation model. When tracking object, it happens object shape variation by camera or object movement in variety environments. The traditional method has an error of tracking from these variation, because it has fixed observation model about the selected object by the user in the initial frame. In order to overcome these problems, we propose a method that updates the observation model by calculating the similarity between the used observation model and the eight-way of edge model from the current position. If the similarity is higher than the threshold value, tracking the object using updated observation model to reset observation model. On the contrary to this, the algorithm which consists of a process is to maintain the used observation model. Finally, this paper demonstrates the performance of the stable tracking through comparison with the traditional method by using a number of experimental data.

• 한국주조공학회지
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• 제30권3호
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• pp.100-110
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• 2010

The solidification sequence and formation of intermetallic phase of Fe-rich Al-Si-Cu alloy were investigated by using real-time imaging of synchrotron X-ray radiation. Effects of cooling rate during uni-directional solidification on the resultant solidification behavior was also studied in a specially constructed vacuum chamber in the SPring-8 facility. The series of radiographic images were complementarily analyzed with conventional analysis of OM and SEM/EDX for phase identification. Detailed solidification sequence and formation mechanisms of various phases were discussed based on real-time image analysis. The growth rates of $\alpha$-AlFeMnSi and ${\beta}-Al_5FeSi$ were measured in order to understand the growth behavior of each phase. It is suggested that real-time imaging technique can be a powerful tool for the precise understanding of solidification behavior of various industrial materials.

• 전기전자학회논문지
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• 제22권3호
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• pp.585-589
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• 2018

Consumer demand for high quality image/video services led to growing trend in image quality enhancement study. Therefore, recent years was a period of substantial progress in this research field. Through careful observation of the image quality after processing by image enhancement algorithms, we perceived that the dark region in the image usually suffered loss of contrast to a certain extent. In this paper, the low-light stretch preprocessing algorithm is, hence, proposed to resolve the aforementioned issue. The proposed approach is evaluated qualitatively and quantitatively against the well-known histogram equalization and Photoshop curve adjustment. The evaluation results validate the efficiency and superiority of the low-light stretch over the benchmarking methods. In addition, we also propose the 255MHz-capable hardware implementation to ease the process of incorporating low-light stretch into real-time imaging systems, such as aerial surveillance and monitoring with drones and driving aiding systems.

• Journal of electromagnetic engineering and science
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• 제11권4호
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• pp.290-297
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• 2011

Recent progresses in the live electrooptic imaging (LEI) technique are reviewed with emphasis on its functionality of real-time visual accesses to traveling electric waves in the GHz range. Together with the principles, configurations, and procedures for the visual observation experiments by an LEI camera system, the following results are described as examples indicating the wide application ranges of the technique; Ku-band waves on arrayed planar antennas, waves on a Gb/s-class digital circuit, W-band waves traveling both in slab-waveguide modes and aerially, backward-traveling wave along composite right/left-handed transmission line, and, waves in monolithic microwave integrated circuit module case.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 추계학술대회 논문집
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• pp.727-731
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• 2005

We introduce a method of color-coded illumination that is simple and fast. The purpose of this study is the real-time shape measurement of three-dimensional object by using color-coded information. The object is illuminated by a prism color spectrum. A color spectrum of a white-light source is imaged onto the object by illumination from one certain direction. The object is observed by a color CCD camera from a direction of observation, which is different from the direction of illumination. It can be evaluated by the red, blue, green using a inherence colors of hue value are good point.

• 한국경영과학회지
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• 제26권4호
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• pp.83-97
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• 2001

Net Present Value (NPV) criterion has been the most widely used criterion to evaluate investment opportunities. However, the analysis based on the NPV criterion falls to consider the managerial flexibility of deferring decisions until major uncertainty is resolved. Recently, real options method attracted a lot of attention as a Powerful approach to address the problem. If investment decision is deferred, the value of the investment opportunity increases but opportunity cost increases at the same time. Therefore, it is important to decide the optimal timing how long the decision can be deferred. In this paper, we developed a model deciding the optimal decision timing. Using the real options approach, the model derived the optimal deferring time until a decision is made. Then, the model was applied to a Korean mobile telecommunications company who wants to invest on the wireless resale business. We believe that this model would be very useful to overcome the problem of NPV decision criterion. With this approach, we can make contingent decisions based on the observation of uncertainly resolutions.

• 한국지리정보학회지
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• 제25권4호
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• pp.200-209
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• 2022

실시간 위치 정보를 제공하는 것이 국가산업의 주요한 목표로 부상하고 있는 실정이다. 이러한 실시간 위치 정보(3차원 공간 정보)를 제공하기 위해서는 위성 측위 방법의 기술 발달이 필수적이다. 그래서 국가에서는 Network RTK GNSS방식을 도입하여, 수요자의 요구에 만족도를 증가시키는 노력을 지속적으로 하고 있다. 본 연구에서는 국토지리정보원에서 제공하고 있는 Network RKT GNSS(Global Navigation Satellite System) 방식 중 VRS(Virtual Reference Station)과 FKP(Flachen-Korrektur Parameter)을 이용하여 통합기준점에서 연속 관측과 단독 관측을 측량하여 정확도 평가를 하였다. 또한 현장에서 급속하게 증가하고 있는 Network RTK GNSS 방법에 대하여 정확도를 제시하여 효율성을 극대화하고자 한다.

• 융합정보논문지
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• 제12권5호
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• pp.40-50
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• 2022

본 연구는 간호대학생이 시뮬레이션 실습 시 동료 팀의 만성폐쇄성폐질환 환자 시나리오 구현 동영상을 실시간으로 관찰하면서 구조화된 동영상 관찰 기록지에 기록한 간호술 영역의 내용을 분석한 질적 연구이다. 4개의 세부영역으로 구분하여 기록된 내용을 효과적, 비효과적 측면으로 구분한 후 내용분석 방법을 사용하여 분석하였다. 연구결과 절차의 정확성에 있어서 효과적 측면은 필요한 물품준비와 증상완화를 위한 중재, 비효과적인 측면은 원칙 미준수, 부적절한 처방 이행, 이론과 수행의 연계 미흡으로 나타났다. 무균술 준수에 있어 효과적 측면은 내과적 무균술 적용과 외과적 무균술 적용, 비효과적 측면은 내과적 무균술 미수행과 외과적 무균술 미수행이었다. 안전과 안위 고려에 있어 효과적 측면은 심리적 안위 고려과 물리적 안전 고려, 비효과적 측면은 안위에 대한 실재감 부족과 환자안전 인식 미흡으로 나타났다. 설명 및 교육의 효과적 측면은 목적 설명과 방법 교육, 비효과적 측면은 설명 부족과 환자수준 미고려이었다. 본 연구에서 간호대학생은 관찰을 통하여 얻은 시각적 정보를 기록하는 과정을 통해 학습에 집중하고 기억을 강화시킬 수 있었을 것으로 사료된다. 또한 본 연구는 시뮬레이션 기반 실습을 통한 간호술 교육의 효율성을 높일 수 있는 요소들을 제시하였다는 점에서 의의가 있다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 1999년도 Proceedings of International Symposium on Remote Sensing
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• pp.95-99
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• 1999

We proposed a new retrieval method for aerosol's real part of refractive index, optical thickness, and Angstrom exponent using POLDER's directional reflectance and polarization data. We showed that aerosol's real part of refractive index can be retrieved systematically using multi-directional PR(polarization and reflectance) diagrams in a single infrared band by our algorithm for the first time. We examined the retrieved results, by comparing with the simultaneously measured sky observation data at the study site and we obtained a reasonable agreement between them.