IIIT Hyderabad Publications |
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Navigation and Bearing Estimation Tasks in 360° Video Interfaces for 2D Desktop DisplaysAuthor: Anirudh Ravipati Date: 2019-03-18 Report no: IIIT/TH/2019/26 Advisor:Priyanka Srivastava Abstract360° field of view (FOV) is becoming a vital part of various human-robot/computer applications, such as urban search and rescue task. Despite growing importance of 360° FOV, very few studies have assessed the effect of 360° visual display on users' remote spatial ability, specifically in the case of 2D 360° User Interface (UI), which is the focus of the current study. We aim to evaluate the efficacy and efficiency of desktop 360° display designs on teleoperators' egocentric spatial ability, specifically navigation and direction judgment in an unknown environment. A previous study[1] showed an advantage of the segmented interface over seamless 360° UI on angle estimation error. However, we are still not clear as to the determining factors that lead to a difference in interface interaction ability. We conducted two studies that studied the scanning effort while using a 360° interface and the ability to estimate the mental egocentric bearing of a target in an environment. We measured the effects of gaming experience, and time constriction, with metrics consisting of time to task completion, target bearing estimation, and latency of target estimation. Further data was collected by an eye-tracking device to help support and complement the data from the studies. We found that gaming experience is a significant positive factor in accuracy and time to task completion. Further, a seamless panoramic view was found to be least effective compared to a segmented interface view of the 360° video feed for target bearing estimation across the entire field of vision presented through the interfaces. Eye tracking data supports the behavioral data collected. It was found that the estimation frequencies in the first study were high for forward heading direction, which was seen in the increased eye movement activity in the same region. In the second study, it was found that angle estimation error was the lowest along mental egocentric axes. This was again observed in the eye tracker data that reported increased activity along the mental egocentric axes. Full thesis: pdf Centre for Cognitive Science |
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