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논문 기본 정보

자료유형
학술대회자료
저자정보
최성규 (울산과학기술원) 한창영 (울산과학기술원) 김효선 (삼성디스플레이) 권오상 (울산과학기술원)
저널정보
대한인간공학회 대한인간공학회 학술대회논문집 2022 대한인간공학회 추계학술대회 및 국제심포지엄
발행연도
2022.10
수록면
150 - 153 (4page)

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초록· 키워드

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Background: It is well known that eye movements affect the temporal limits of the human visual system. Critical fusion frequency (CFF), the frequency above which the visual stimulus appears steady and continuous, is widely used to characterize the temporal properties of the human visual system and is known as 50-90Hz. Previously, we found that if eye movements are forced, edges defined by luminance differences of stimuli can be detected at 500 Hz, suggesting that a significant increment in CFF of the edge stimuli is attributable to our eye movements. Objective: This study aims to explain why CFF of the edge stimuli is significantly higher than the common CFF even when observers fixated their eyes at the center of the screen. Method: First, we collected an extensive amount of data including participants’ detectability of flicker and eye movements together. These data were used to establish an index which quantifies the degree of eye movements executed during the stimulus presentation. We examined whether there is a systematic pattern of CFF changes depending on the degree of fixational eye movements. Second, we adjusted the stimulus duration to reduce the influence of eye movements on CFF and measured CFF. Results: We confirmed that CFF of the edge stimuli significantly increased as the eye movements index increased. However, CFF of the edge stimuli did not show a significant difference from the commonly used CFF if the stimulus is presented for a short time, indicating less intervention of eye movements. Conclusion: Results of the two experiments showed a consistent finding that fixational eye movements, which is unavoidable in our every life, are the major factors in determining CFF of the edge stimuli. Application: Postulating that our eyes are constantly moving, the temporal limit beyond which we cannot perceive flicker may differ from the typical range of CFF.

목차

ABSTRACT
1. Introduction
2. Preliminary studies
3. CFFs of uniform and edge stimuli depending on eye movements
4. CFFs of uniform and edge stimuli depending on stimulus duration
5. Discussion
5. Conclusion
References

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