• Proceedings of the IEEK Conference
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• 1998.06a
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• pp.777-780
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• 1998

물체의 3차원적인 정보를 복원하는 일은 그 정보의 일련된 이용에 있어서 중요한 문제이다. 이를 위해 여러가지 방법들이 연구되고 있으며, 그 중 shape from focus(SFF) 방법은 영상의 초점이 맞는 렌즈의 위치를 찾아내어 렌즈 공식에 의해 초점이 맞는 부분의 거리 정보를 구할 수 있다. 기존의 이 방법은 초점이 맞았는지의 정도를 계산하기 위한 focus measure 값들을 카메라의 광학축에 수직인 단순한 평면으로 가정하여 그 합이 최대가 되는 위치를 찾아내었다. 이를 개선하기 위해서 focused image surface(FIS) 개념이 연구되었고 그로 인해 더욱 나아진 결과를 얻었다. 물체의 FIS는 카메라 렌즈에 의해 초점이 맞게된 물체의 점들의 집합으로 이루어진 공간상의 면이다. 기하광학에 의해 물체의 모양과 FIS 상이에는 일대일 대응 관계가 있고 FIS의 형태를 구하는것이 결국은 물체의 모양을 복원하는것이다. FIS 개념을 처음 적용할 때는 물체의 모양이 부분적으로 영상 탐지기(image detector)와 같은 평면으로 가정하여 3차원 공간상에서 가능한 모든 방향의 평면에 대한 focus measure를 구하여 그 값이 최대가 되는 렌즈의 위치를 구하였다. 그러나 이러한 방법은 focus measure의 합이 정사각형의 윈도우에서 계산되기 때문에 곡면으로 이루어진 실제 물체에서는 오차르 ㄹ가지게 된다. 본 논문에서는 이와는 달이 평면이 아닌 곡면에 대한 focus measure의 합이 최대가 되는 렌즈의 위치를 구하여 이전의 방법들 보다 정확한 복원이 가능함을 보인다.

• Korea Journal of Hospital Management
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• v.16 no.3
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• pp.115-132
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• 2011

Prior research in medical service field have mainly focused on service quality, satisfaction, and choice attributes of hospital. However, a little research has been done on "Which service quality attributes are more preferred by customer motivation(customer regulatory focus)". This study examines how regulatory focus affects the structural impact relationships of service quality and emotion(quiescence) on perceived value in medical service context. Especially, this research draws the moderating effects of regulatory focus between medical service quality, emotion, and perceived value. The Results were summarized as follows: The relative impacts of medical service quality on customer emotion are different depending upon the regulatory focus. Hospital reputation is shown to be more important factors in prevention-oriented customer, while physical environment is the case in promotion-oriented customer. The relative impacts of medical service quality and emotion on perceived value are different depending upon the regulatory focus. Hospital reputation, convenience, and accessibility are shown to be more important factors in promotion-oriented customer, while physical environment is more important in prevention-oriented customer. Also, emotion has a positive influence on perceived value in prevention-oriented customer, whereas the effect of emotion is not significant in promotion-oriented customer.

• Fashion & Textile Research Journal
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• v.16 no.4
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• pp.580-587
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• 2014

This study demonstrates how the composition of VM based on regulatory focus influences shopping value and how shopping value influences shopping satisfaction. A survey form was developed and 90 copies were used for analysis. SPSS 19.0 for Windows Package was used to perform frequency analysis, factor analysis, and regression analysis. The results of the study were: First, convenience of VM had a significantly positive (+) influence on utilitarian shopping value. Second, both utilitarian shopping value and hedonic shopping value had a statistically significant influence on shopping satisfaction. Third, in terms of promotion focus, suitability, fashionableness, reconcilability, and attractiveness of VM had a significantly positive (+) influence on the hedonic shopping value. In terms of preventive focus, convenience and reconcilability of VM had a significantly positive (+) influence on utilitarian shopping value, and convenience, suitability, and fashionableness had a significantly positive (+) influence on hedonic shopping value. In the promotion focus, both utilitarian shopping value and the hedonic shopping value had a significantly positive (+) influence on shopping satisfaction. In the preventive focus only the utilitarian shopping value had a significantly positive (+) influence on shopping satisfaction.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.10B
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• pp.1117-1123
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• 2009

Head fixed type multi-focus display system using Galvano-scanner and DMD(Digital Micro-mirror Device), which is able to perfectly accommodate, can solve eye fatigue due to conflict between convergence eye movement and accommodation action in stereoscopic display. This system is able to accommodate through making convergence point about each view point and offering it in front of observer's pupil by using laser scanning method. In this paper, we analyzed laser scanning method of this multi-focus display system. And multi-focus display system based on this analysis was made, which showed that focus adjustment was possible through video camera. As a result, formation principle of view point of multi-focus system by laser scanning method was verified.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.1003-1006
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• 2005

Demand of Auto Focus for Camera module is increased very fast in these days and will be adapted to most of mobile phones in next few years instead of traditional method, fixed focus. To make auto focus function, 2 kinds of solutions, VCM(Voice Coil Motor) and Piezo linear motor are normally used. In this paper, VCM which commercially strong candidate for Auto focus mechanism was investigated to verify principles are match up to the actual operation. Auto focus algorithm is different between 1 chip and 2 chip solution. Normally 2 chip is more complicate than the other. To have best performance on this function, hysteresis and depth of field(DOF) table should be optimized.

• Journal of Korea Society of Industrial Information Systems
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• v.25 no.6
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• pp.85-94
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• 2020

The importance of organizational learning is increasing. Drawing on regulatory focus theory and upper echelon theory, this study aims to identify the relationship of the regulatory focus of managers and three aspects of organizational learning, namely breadth, depth, and speed of organizational learning. While identifying the significant influence of promotion focus on the three aspects of organizational learning, we found that the influence of promotion focus of breadth of organizational learning is statistically stronger than that of prevention focus.

• Asia Marketing Journal
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• v.15 no.4
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• pp.51-60
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• 2014

Previous research on loyalty program has verified the factors that influence redemption behavior and the understanding of the mechanism of redemption behavior with academic and practical implications. However, these research has not proven boundary conditions in which the phenomena can be strengthened or weakened- that is, the moderating effect remains unclear. The inclusion of moderating variables can provide a more extensive understanding of the mechanism of this behavior from academic and managerial perspectives alike. Therefore, this current research proposes regulatory focus as a moderating variable, which has received scarce attention in the study of loyalty program behavior, especially individual characteristic variables that, in turn, affect the consumers' purchasing behavior in various ways. Previous research on consumer decision making investigates the differential role of regulatory focus as a series of stages. Regulatory focus theory posits that people depend on the two types of regulatory focus when pursuing goals: promotion focus vs. prevention focus. The former induces tendencies to recognize a goal as a hope and ideal, as something that satisfies the need for accomplishment, and to be sensitive to the presence of a positive outcome of the match and to match the pursuit of goals. On the other hand, the latter tends to regard a goal as the responsibility or obligation to achieve the goal, has a tendency to avoid failure to meet a target, and is sensitive to the presence of the negative consequences that do not reach the target. The following propositions are suggested: 1) The effect of higher accumulation effort level on delaying point redemption speed will be relatively more pronounced for customers with prevention focus. 2) The effect of higher accumulation effort level on large redemption unit size will be relatively more pronounced for customers with prevention focus. 3) The effect of higher accumulation effort level on hedonic redemption ratio will be relatively more pronounced for customers with promotion focus. Therefore, this research provides a moderating variable that has the potential to be used as a reference for market segmentation and affects the relationship between point accumulation effort and three sides of point redemption behavior. On this basis, the direction for the future research on this issue is recommended. Future research could verify these propositions conducting a survey of customers' propensity of regulatory focus in conjunction with the history of the loyalty program of data. This would provide a more realistic effect on the usage behavior of loyalty program consumers by providing useful implications for both marketing practitioners and researchers.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.1007-1008
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• 2008

This paper introduces a new focus measure using Principal Component Analysis (PCA) for Shape from Focus (SFF). A neighborhood consisting of seven pixels is taken and the focus quality is computed over the whole sequence. The experimental results demonstrate effectiveness and robustness of the proposed method.

• Proceedings of the KIEE Conference
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• 1997.11a
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• pp.116-118
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• 1997

The moving average filter in this paper, which has robust performance to the noise and can be easily implementable in hardware, is modified in view of real-time processing of the focus value. The simple hardware configurations are implemented to calculate the focus value in real-time. The stable controller of focus lens actuated by motors are designed. The hardware which are composed of EPLD, cheap vision chips, and CPU etc. are designed to perform the real-time calculation of focus value.

• Proceedings of the Optical Society of Korea Conference
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• 2006.07a
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• pp.373-374
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• 2006