• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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• pp.1031-1034
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• 2007

The interactions between two-dimensional and three-dimensional stimulus configurations on visually induced self-motion perception (vection) were examined. The experiment revealed that there is no 2D-3D interaction, and vection strength is determined solely by the size of the moving background stimulus, which should be a primary factor in inducing vection.

• 방송공학회논문지
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• 제17권6호
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• pp.911-923
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• 2012

최근 3DTV 및 3D 디스플레이가 공급되면서 입체영상 제작도 활발히 진행되고 있다. 입체영상은 좌영상과 우영상으로 만들어지는데, 제작된 입체영상은 수정 없이 그대로 시청자에게 공급되고 있다. 2D 영상도 고주파 성분을 이용하여 깊이감을 높이고, 색보정을 거처 자연색과 유사한 색을 재현하는 등의 연구는 오랫동안 진행되어 왔다. 이 기술을 입체영상에 적용하고자 하는 것이 본 논문의 목적이다. 기 제작된 입체영상의 컬러를 변환함으로써 3D 입체감을 개선하는 방법을 제안한다. 이를 위해서 본 논문에서는 스테레오 영상으로부터 깊이맵을 획득하고, 기존 컬러 변환을 통한 2D 영상의 지각 깊이감 개선을 입체영상에 적용하여, 3D 입체감을 향상시키는 방법을 제안한다. 이를 위해 스테레오 정합 방법과 컬러 변환 방법으로 대조 변환 및 배경 다크닝 방법을 제안하고, 실험을 통해 제안 방법이 상기 목적을 얻을 수 있는 것을 검증하였다.

• 보건행정학회지
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• 제23권4호
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• pp.326-342
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• 2013

Background: Engaging and Involving stakeholders who have different interests in changing health care policies are difficult task. As the literature on the governance in Korean health care field is rare, this study aims to provide empirical evidence of 'governing health policy'-the ways health care policy is made, implemented, and evaluated from a political perspective. Methods: The authors of this study conducted interviews with elites in policy and clinical areas, which was considered to be the most effective approach to gather in-depth information about the background of changing payment policy as well as the barriers or contributors for making the policy sustainable. A total of 14 experts (3 government officials, 2 representatives from medical profession, 3 professors form academic field, and 6 healthcare providers from New DRG pilot program hospitals) participated in 2 hour long interviews. Results: There was a perception gap of the feasibility and substantiality of new payment system among elites. The score was higher in government officers than those in scholars or clinical experts. Next, the interviewees indicated that Korean New DRG might not sustain without significant efforts to improving democratic aspects of the governance. It is also notable that all interviewees except healthcare providers provided negative expectation of the contribution of new payment system to increase administration efficiency. For clinical efficiency, every stakeholders perceived there was no increased efficiency after introduction of New DRG payment. Like general perception, there was a wide gap between the perception of stakeholders in quality change after implementing the new payment system. Finally, interview participants negatively assumed about the likelihood of New DRG to remain a case of successful reforms. Conclusion: This study implied the importance of social consensus and the governance of health policy.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1995년도 춘계학술대회논문집
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• pp.181-186
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• 1995

This study investigated the effects of several factors - stimulus color, background color, and predicted depth - that affect depth perception in stereoscopic displays. For this study, two experiments were conducted; in the first experiment, the subjects were asked to indicate the depth perceived from presented image(rectangle) using matching mark, and in the second experiment, the subjects were asked to adjust one image(controllable rectangle) to have the same perceived depth as the other image(fixed rectangle) using keyboard. The depth perceived under various combination of levels of these factors was compared with depth predicted by the geometry of streopsis. Through two experiments, we found that stimulus color, predicted depth, and interaction between stimulus color and background color affected perceived depth significantly, and that red was perceived to be closest to the observer followed by yellow, green, and then blue.

• 패션비즈니스
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• 제9권3호
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• pp.22-36
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• 2005

This research is to classify psychological risk perceptions in purchases process at counterfeit at fashion luxury brands, into a risk perception on purchase activity itself and a risk perception on the post-purchase situation, and to analyze types and characteristics at risk reduction behaviors to reduce each risk perception. In this research a qualitative method was employed, and research-related data were collected and analyzed through in-depth interviews. Results were shown that risk reduction behaviors at psychological risk perception on purchase activity itself included rationalization of purchase, accompanied purchase, reduction and discontinuance of purchase, and that risk reduction behaviors of psychological risk perception on the post-purchase situation included information search, establishment of selection criteria, establishment of marginal limit, selective purchase, planned and compared purchase, and reduction and discontinuance of purchase. Previous researches suggested brand loyalty, selection of famous brands, utilization of information agents by marketers, pre-purchase usage and guaranteed purchase, but these risk reduction methods were not utilized, this probably being interpreted as a result of characteristics of counterfeit. In addition, risk reduction behavior of one type tended to reduce risk perception of several other types, and risk reduction behaviors of various types were utilized to reduce a certain type's risk perception. Not only types of risk perception but also levels of risk perception appeared to have exerted influence to risk reduction behaviors.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.1334-1337
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• 2009

The human vision system has visual functions for viewing 3D images with a correct depth. These functions are called accommodation, vergence and binocular stereopsis. Most 3D display system utilizes binocular stereopsis. The authors have developed a monocular 3D vision system with accommodation mechanism, which is useful function for perceiving depth.

• 한국차세대컴퓨팅학회논문지
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• 제15권5호
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• pp.75-83
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• 2019

직접 볼륨 렌더링은 의료영상과 같은 3차원 볼륨 데이터의 가시화에 널리 사용되는 방법이다. 본 논문은 직접 볼륨 렌더링의 깊이 인식을 향상시키기 위해 피사계 심도 효과를 볼륨 광선투사법에 적용하는 방법을 제안한다. 제안하는 방법은 인간의 지각 모델을 기반으로 카메라 모델을 적용하며 지터드 렌즈 샘플링을 사용하여 제한된 개수의 광선으로 사실적인 이미지를 획득할 수 있다. 또한, 전처리 과정 없이 GPU 파이프라인 안에서 피사계 심도를 바로 계산하여 볼륨 데이터의 대화식 탐색이 가능하다. 의료영상을 포함한 여러 데이터에 적용한 실험에서 기존 방법보다 2.6~4배 빠른 시간에 피사계 심도 효과를 표현하여 깊이 인식에 보다 도움을 주는 영상을 생성하는 것을 확인하였다.

• 가정과삶의질연구
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• 제9권2호
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• pp.285-302
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• 1991

This purpose of this study was to analyze the perception of household work's value between husbands and wives. The data were collected using questionnaire and in-depth interview method for this purpose. 297 couples for questionnaire and 20 couples for interview were sampled. The data were analyzed by the statistical method such as frequency, percentile, paired t-test, t-test. The major findings were as follows; 1) The wives played primary role in doing household work. 2)the level of husbands's social value perception of household work was higher than wives's but the differences between them was not significant statistically. 3) The level of economical value perception of household work between husbands and wives was lower than the level of their social value perception.

• 여성건강간호학회지
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• 제24권3호
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• pp.297-309
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• 2018

Purpose: To develop Pregnancy Risk symptom Perception Scale (PRPS) and evaluate its validity and reliability. Methods: A preliminary 30-item version of PRPS was developed through literature review, in-depth interview, and Content Validity. Each item was scored on a four-point Likert scale. The preliminary scale was developed based on 301 pregnant women who visited a hospital. Date were analyzed using item analysis, factor analysis, confirmatory factor analysis, Pearson's correlation coefficients, and Cronbach's ${\alpha}$ (0.90 for total item, 0.80 to 0.88 for factors). Results: The PRPS consisted of 27 items. Three factors (physical, environmental, and emotional factors) explained 55% of the total variance. Cronbach's Criterion validity was supported by comparison with the Perception of Pregnancy Risk Questionnaire (r=0.34). In reliability test, the reliability coefficient of pregnancy risk symptom perception was high at 0.90. Conclusion: These results suggest that the pregnancy risk symptom perception scale developed in this study comprises items that can assess the level of pregnant women's pregnancy risk symptom perception in Korea. Its validity and reliability were proven. PRPS can be utilized to measure pregnant women's risk symptom perception during pregnancy. PRPS will contribute to the development of systematic prenatal care and effective risk management.

• 방송공학회논문지
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• 제14권5호
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• pp.616-624
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• 2009

본 논문에서는 인물, 배, 풍경 등으로 구성되는 한국 고전화의 3D 입체 Tour-Into-Picture를 제안한다. 기존의 TIP 기법은 2D 영상 또는 동영상을 제공하는 것과는 달리, 제안하는 TIP는 3차원 입체 콘텐츠를 제공한다. 따라서 한 장의 영상 내부를 항해하면서 입체로 시청할 수 있는 특징이 있다. 제안 방법은 첫째 전경 마스크, 배경영상, 및 깊이맵을 생성한다. 다음에는 영상 내부를 항해하면서 투영 영상들을 획득한다. 마지막으로 전경객체에서 발생하는 카드보드효과를 감소시키기 위하여 템플릿 및 로스 텍스처 필터 기반 깊이맵 생성을 새로이 제안한다. 제안 방법을 조선시대의 작품인 신윤복의 '단오풍정'과 김홍도의 '무이귀도'에 적용하였고, 입체 애니메이션으로 제작되어 보다 실감 있는 콘텐츠를 제공한다.