• 제목/요약/키워드: Visual changes

검색결과 1,520건 처리시간 0.024초

Effect of Under and Over Refractive Correction on Visual Acuity Performance using Two Different Charts

  • Chen, Ai-Hong;Shah, Siti Salwa Mohamad;Rosli, Saiful Azlan
    • 한국안광학회지
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    • 제18권3호
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    • pp.291-295
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    • 2013
  • Purpose: The purpose of this study was to investigate the effect of under and over refractive correction on visual acuity performance and the variation of the visual performance measurement using two different visual acuity charts. Methods: Ten young adults, aged between 19 and 25 years old, were recruited. Inclusion criteria: no history of ocular injury or pathology with a best-corrected visual acuity of 6/6 on dominant eye. The over and under refractive corrections were induced using minus and plus spherical ophthalmic lenses in 0.50 D steps up to 3.00 D; as well as using three axis orientations of cylindrical ophthalmic lenses ($45^{\circ}$, $90^{\circ}$ and $180^{\circ}$) in 0.50 D steps. The variation of visual acuity performance measurements was investigated using Bailey-Lovie LogMAR chart and Landolt C chart. Results: The visual acuity changes with lenses were significantly different between two charts [F = 49.15, p < 0.05 with plus spherical ophthalmic lenses and F = 174.38, p < 0.05 with minus spherical ophthalmic lenses]. The visual acuity changes with three different cylindrical axis showed no significant difference between Bailey-Lovie LogMAR chart [F = 2.35, p > 0.05] and Landolt C chart [F = 3.12, p = 0.05]. Conclusions: The over and under refractive correction affected the visual acuity performance differently. The Landolt C chart and Bailey-Lovie LogMAR chart demonstrated variation in measurements.

실시간 주관적 감성 변화와 GSR 반응과의 상관 관계 (A Study on Correlation between On-Line Subjective Evaluation and GSR)

  • 정순철;민병찬
    • 한국감성과학회:학술대회논문집
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    • 한국감성과학회 2003년도 춘계학술대회 논문집
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    • pp.120-122
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    • 2003
  • In this study, an experiment was conducted in order to investigate the feasibility and effectiveness of and on-line subjective assessment (OLSA) system. The present study compared Galvanic Skin Response (GSR) with the OLSA by presenting 28 subjects in their 20s with pictures arousing either positive or negative sensibility. According to the correlation coefficients, changes in subjective sensibility caused by the positive visual stimulus were related more closely to GSR, from the positive visual stimulus, and changes in subjective sensibility caused by the negative visual stimulus were related more closely to GSR from the negative visual stimulus. In conclusion, the most remarkable characteristic of the present system is that it not only assesses the average sensibility when stimuli are presented, but also shows the changing strength of sensibility over time.

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시각적 부조화를 통한 로버트 벤추리 건축과 팝아트의 방법적 유사성에 관한 연구(1) (A Study about the Methodological Similarity of Robert Venturi's Works and American Pop Art in the Light of Visual Dissonance(1))

  • 신유림;임석재
    • 건축역사연구
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    • 제21권4호
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    • pp.59-70
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    • 2012
  • This study aims to find methodical similarities between pop art and Robert Venturi's works. Pop art and Robert Venturi's works gave attention to periodical changes and wanted to communicate with the public. This study approaches a topic from psychological viewpoints, especially visual dissonance. The results are as follows: 1. Manufactured Products ; Commercial Ornaments ${\rightarrow}$ Character Changes in Experienced Stimulation 2. Daily Elements ; Traditional Elements(Classic) ${\rightarrow}$ Contextual Effect of Canonic Representation In these cases, visual dissonance attracted a lot of public attention, and people would develop new meanings of objet. Pop art and Robert Venturi's works indicated value change in post-industrial society, therefore, this study can help to understand the correlation.

교육과목에 나타난 시각디자인 교육의 변화 (A Study of Changes on the Visual Communication Design Education in Major Subjects)

  • 전성복
    • 디자인학연구
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    • 제12권2호
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    • pp.109-118
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    • 1999
  • 우리나라에 대학교육이 시작되고 지금의 발전된 대학들의 모습이 있기까지는 많은 변화가 있었다. 디자인 교육도 해방직전부터 시작하여 지금에 이르기까지 많은 변화 속에 다양한 전공들이 생겨났다. '도안과'라는 전공으로 시작되어 지금은 컴퓨터 정보화 시대를 반영이라도 하듯 멀티미디어디자인 전공까지 탄생하기에 이르는 맡은 변화를 가져온 것이다. 이러한 변화와 더불어 고과과정도 개정을 거듭하게 되었고 그 속의 교육과목 또한 그 시대를 반영하면서 변화 되어왔다. 시각디자인 전공도 그 예외는 아니었다. 특히 시각디자인 전공은 시각에 전달하고자 하는 모든 매체의 수용을 해야하는 전공의 특성상 컴퓨터라는 새로운 매체를 어떻게 수용하여 가르칠 것이냐 하는 문제가 매우 중요시되고 있는 시점이다. 기존의 교육과목과 컴퓨터그래픽디자인 교육과목을 적절히 수용하여 활용하는 대학교육이 하루 빨리 정착되어야 하기 때문이다.

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조명의 변화가 심한 환경에서 자동차 부품 유무 비전검사 방법 (Auto Parts Visual Inspection in Severe Changes in the Lighting Environment)

  • 김기석;박요한;박종섭;조재수
    • 제어로봇시스템학회논문지
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    • 제21권12호
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    • pp.1109-1114
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    • 2015
  • This paper presents an improved learning-based visual inspection method for auto parts inspection in severe lighting changes. Automobile sunroof frames are produced automatically by robots in most production lines. In the sunroof frame manufacturing process, there is a quality problem with some parts such as volts are missed. Instead of manual sampling inspection using some mechanical jig instruments, a learning-based machine vision system was proposed in the previous research[1]. But, in applying the actual sunroof frame production process, the inspection accuracy of the proposed vision system is much lowered because of severe illumination changes. In order to overcome this capricious environment, some selective feature vectors and cascade classifiers are used for each auto parts. And we are able to improve the inspection accuracy through the re-learning concept for the misclassified data. The effectiveness of the proposed visual inspection method is verified through sufficient experiments in a real sunroof production line.

외인성 주의 유도에 의한 시야의 시각 민감도 변화 (Changes in sensitivity across visual field induced by exogenous attention)

  • 정상철;현주석;정찬섭
    • 인지과학
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    • 제8권4호
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    • pp.63-75
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    • 1997
  • 주의 위치로부터의 거리에 따른 시각 민감도 변화를 조사하였다. 피험자가 시야 평면의 한 점을 응시하는 동안 응시점에서 좌우 대칭으로 4。 떨어져 있는 주의 유도점중 하나를 깜빡인 다음 주의 유도점 부근에 표적 자극을 제시하였다. 피험자의 과제는 그 표적이 나타났는지의 여부를 판단하여 보고하는 것이었다. 표적 자극의 탐지율은 주의 유도점 인접한 곳에서 가장 높았으며 그곳으로부터 멀어질수록 점진적으로 감소하였다. 이러한 결과는 주의 유도에 의한 시각 민감도의 점진적 변화 모형(gradient model)을 지지하는 것이다.

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플레어 팬츠의 바지부리 폭과 허리선 위치의 변화에 따른 시각적 평가 (A Study on the Visual Evaluation According to Changes in Width of Hem Line and Waistline Position of Flare Pants)

  • 이정순
    • 한국의상디자인학회지
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    • 제14권4호
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    • pp.127-137
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    • 2012
  • The purpose of this study is to recognize the differences of visual evaluation by variations in width of hem line and waistline position of the flare pants. The stimuli are 9 samples: One control group, 3 variations of the width of hem line and 3 variations of the waistline position. The data has been obtained from 44 fashion students. The data has been analyzed by Factor Analysis, Anova, Scheffe's Test and the MCA method. The results of the study are as follows: The visual evaluation by the width of hem line and waistline position of flare pants are composed of 5 factors : physical characteristics, elegance, originality, comfort, and stiffness. Among these factors, the physical characteristic is evaluated to be the most important factor. As a v isual evaluation result o f changes in the width o f hern l ine, 8 4 cm in width (the narrowest width) was highly evaluated in physical characteristics, elegance, and originality factors. For the result of changes in the waistline position, high-waisted flare pants were highly effective in physical characteristics, and also evaluated well in elegance, originality and stiffness factors. The flare pants did not show any interaction between the width of hem line and waistline position. The waistline position had more influence on visual evaluation in physical characteristics, originality and comfort factors while elegance and stiffness factors were affected by the width of hem line.

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A study on the expansibility of sound-responsive visual art contents

  • Jiang, Qianqian;Chung, Jean-Hun
    • International journal of advanced smart convergence
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    • 제11권2호
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    • pp.88-94
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    • 2022
  • The relationship between sound and vision was experimentally confirmed by physicist Ernst Florens Friedrich Chladni as early as the 18th century and formally entered into systematic research. With the development of emerging media technology, sound reactive type visual content is not limited to a single visual interaction based on the vibration of sound, and its visual content shows a diversified and scalable development trend according to different purposes in many fields. This study analyzes the development and changes of sound visual art contents from early stage to modernization, and analyzes the development characteristic of sound visual art content in different fields and scene environments influence by interactive media, new media technologies and devices by means of case analysis. Through this research, it is expected that the sound reactive type visual art content can continue to develop and extend in the existing fields, while explore the scalability of the application of sound reactive type visual art content in more fields.

Anaglyph 3D입체 영상 시청 후의 시기능 변화 (Changes in Visual Function After Viewing an Anaglyph 3D Image)

  • 이욱진;곽호원;손정식;김인수;유동식
    • 한국안광학회지
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    • 제16권2호
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    • pp.179-186
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    • 2011
  • 목적: Anaglyph 3D입체 영상 시청에서 나타나는 시기능 변화를 비교 평가하고자 하였다. 방법: 대학생 70명(평균나이 22.29${\pm}$2.19세)을 대상으로 2D영상과 적록안경방식의 anaglyph 3D영상 시청 전후의 시기능을 검사하였다. 시기능 평가는 von Graefe법을 이용한 사위 검사, (-)렌즈 부가법을 이용한 조절력 검사, 음성 및 양성상대조절력(negative relative accommodation, NRA; positive relative accommodation, PRA) 검사, 음성 및 양성상대폭주력(negative relative convergence, NRC; positive relative convergence, PRC) 검사, 조절용이성 및 이향용이성 검사로 하였다. 결과: 3D영상 시청 후의 시기능 평가에서 근거리의 외사위 감소와 조절력 감소를 보였고, 이와 관련하여 적은 변화이긴 하지만 근거리의 NRC는 증가하는 경향을, PRC는 감소하는 경향을 보였다. NRA와 PRA의 변화는 없었으며, 조절용이성과 이향용이성은 더 좋아진 것으로 확인되었다. 결론: 시기능 변화는 2D영상보다 3D영상 시청에서, 원거리보다 근거리에서 더 많은 변화를 보였으며, 특히 3D영상 시청 후의 조절용이성과 이향용이성 향상은 3D영상에서 입체감을 갖기 위한 조절과 이향의 지속적인 운동 효과와 관련이 있는 것으로 판단된다. 이러한 시기능 변화를 볼 때, anaglyph 3D영상이 anaglyph방식의 시기능 훈련과 같은 효과가 어느 정도 있는 것으로 본다.

경도의 발달장애 아동의 시지각 및 주의력 향상을 위한 시기능 훈련의 임상사례 (Clinical cases of vision therapy for visual perception and attention enhancement of children with mild developmental disabilities)

  • 이승욱;장우영
    • 한국임상보건과학회지
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    • 제5권3호
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    • pp.888-896
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    • 2017
  • Purpose. The purpose of this study was to investigate the effect of visual field training on visual function, visual perception and attention enhancement. Methods. We examined the changes of visual function and visual perception tests for children with mild developmental disabilities through vision therapy. Results. At the time of the initial visit of the child, the ability to control not only distant and near visual function, but also accommodation, was also very limited. Also, the visual perception score was measured at 80 points. Through vision therapy, it was confirmed that the improvement of control ability as well as the visual function and visual perception function test results were also improved to 108 points. Conclusion. It was confirmed that vision therapy results in an improvement of visual function, improved visual perception ability, as well as visual perception ability, It was concluded that visual function affected visual perception, and that vision therapy used in order to prevent visual function deterioration was found to be very helpful.