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4k - UHD 콘텐츠의 카메라 PAN에 따른 시청 불편감 연구

The Effect of Camera Panning to Visual Discomfort in 4k - UHD Contents

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초록

In this paper, we analyze the effect of camera panning to the visual discomfort in 4k-UHD contents. UHD is now widely spread but still suffers from the time and coast in contents creation due to vast amount of file size. In another aspect, UHD may yield the visual fatigue caused by objects or frames moving in the large screen. To investigate the visual discomfort in the presence of camera panning, subjective evaluation is conducted using video clips that are created considering the distance between the camera, characters and background. Subjective scores illustrate that the effect of camera panning is strongly correlated with the camera panning speed, and weakly related to the distance among three elements. From the subjective test, we conclude that visual discomfort occurs when the object moves at a speed over 2560 pixels per second, or 43 pixels per frame in 4K UHD contents, and 96 cm per second, or 1.6 cm per frame in a 65 inch monitor.

Abstract

In this paper, we analyze the effect of camera panning to the visual discomfort in 4k-UHD contents. UHD is now widely spread but still suffers from the time and coast in contents creation due to vast amount of file size. In another aspect, UHD may yield the visual fatigue caused by objects or frames moving in the large screen. To investigate the visual discomfort in the presence of camera panning, subjective evaluation is conducted using video clips that are created considering the distance between the camera, characters and background. Subjective scores illustrate that the effect of camera panning is strongly correlated with the camera panning speed, and weakly related to the distance among three elements. From the subjective test, we conclude that visual discomfort occurs when the object moves at a speed over 2560 pixels per second, or 43 pixels per frame in 4K UHD contents, and 96 cm per second, or 1.6 cm per frame in a 65 inch monitor.

참고문헌 (11)

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  2. Masaoka, K., "Presence and preferable viewing conditions when using an ultra high-definition large-screen display", Proceedings of SPIE-IS&T Electronic Imaging, SPIE, 5668, pp.28~37 (2005)
  3. Sugawara, M., "Research on Human Factors in Ultrahigh-Definition Television (UHDTV) to Determine Its Specifications", SMPTE Motion Imaging Journal, 117(3), pp.23~29 (2008)
  4. Emoto, M., "The viewing angle dependency in the presence of wide field image viewing and its relationship to the evaluation indices", Displays, 27(2), pp.80~89 (2006)
  5. ITU-R, "Relative quality requirements of television broadcast systems", Recommendation ITU-R BT.1127, ~ (1994)
  6. ITU-R, "Guidelines on metrics to be used when tailoring television programmes to broadcasting applications at various image quality levels and sizings", Recommendation ITU-R BT.1845, ~ (2008)
  7. ITU-R, "Parameter values for an expanded hierarchy of LSDI image formats for production and international programme exchange", Recommendation ITU-R BT.1769, ~ (2008)
  8. ITU-R, "The present state of ultra-high definition television", Report ITU-R BT.2246, ~ (2012)
  9. ITU-R, "Parameter values for ultra-high definition television systems for production and international programme exchange", Recommendation ITU-R BT.2020, ~ (2012)
  10. ITU-R, "Methodology for the subjective assessment of the quality of television pictures", Recommendation BT.500-12, ~ (2012)
  11. ITU-T, "Audiovisual quality in multimedia services Subjective video quality assessment methods for multimedia applications", ITU-T P.910, ~ (2008)

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