透過具空間導引之子畫面視覺化呈現觀看360影片時視野外的趣味焦點

林湧達

doi:10.6342/NTU201703281

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透過具空間導引之子畫面視覺化呈現觀看360影片時視野外的趣味焦點

Outside-In: Visualizing Out-of-Sight Region-of-Interests in a 360 Video Using Spatial Picture-in-Picture Previews

林湧達 , Masters　　Advisor：陳炳宇　　

英文 DOI： 10.6342/NTU201703281

360影片；遠端視訊；子畫面；視窗外；多焦點； 360 Videos ； Telepresense ； Picture-in-picture ； Off-screen ； Targets

Abstract │ Reference (12) │ Altmetrics

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360 videos contain full field of environmental content, however, brows- ing the videos, either on screens or through head-mounted displays (HMDs), suggests users to consume only a subset of the full field for natural view- ing experience. This causes a search problem when the region-of-interests (ROIs) in a video are outside of the current field of view (FOV) on the screen, or users may search for non-exist ROIs. We propose Outside-In, a visualization technique which re-introduces off-screen ROIs into the main screen as spatial picture-in-picture (PIP) previews. The geometry of the preview windows further encodes the ROIs’ relative directions to the main screen view, allowing for effective navigation. To mitigate occlusion caused by multiple PIPs, we further introduce rapid serial visual presentation (RSVP) to ensure that each preview is fully visible within divided time. Our user studies identified effective designs to maintain readability in preview geometry and the RSVP interval. Two applications demonstrate using Outside-In for effective 360 video navigation on touchscreens and in live telepresence.

Reference ( 12 ) 〈TOP〉

[1] Shunichi Kasahara and Jun Rekimoto. Jackin: Integrating first-person view with out-of-body vision generation for human-human augmentation. In Proc. ACM AH ’14, pages 46:1–46:8, 2014.
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[3] Sean G. Gustafson and Pourang P. Irani. Comparing visualizations for tracking off- screen moving targets. In Proc. ACM CHI ’07 EA, pages 2399–2404, 2007.
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[4] Sean Gustafson, Patrick Baudisch, Carl Gutwin, and Pourang Irani. Wedge: Clutter- free visualization of off-screen locations. In Proc. ACM CHI ’08, pages 787–796, 2008.
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[5] Andreas Girgensohn, Frank Shipman, Thea Turner, and Lynn Wilcox. Effects of presenting geographic context on tracking activity between cameras. In Proc. ACM CHI ’07, pages 1167–1176, 2007.
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[6] Y. Wang, D. M. Krum, E. M. Coelho, and D. A. Bowman. Contextualized videos: Combining videos with environment models to support situational understanding. IEEE Transactions on Visualization and Computer Graphics, 13(6):1568–1575, 2007.
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