Variability of eye movements when viewing dynamic natural scenes
Variability of eye movements when viewing dynamic natural scenes
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DOI：
10.1167/10.10.28
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发表时间：
2010-01-01
影响因子：
1.8
通讯作者：
Barth, Erhardt
中科院分区：
文献类型：
--
作者：
Dorr, Michael;Martinetz, Thomas;Barth, Erhardt
自由观看动态自然场景时，不同受试者的眼睛运动模式有多相似？我们在18个高分辨率室外场景的高分辨率视频中收集了一个大量的眼动数据库，并使用归一化扫描Path的显着性测量了它们的可变性，我们将其扩展到了时间域。即使大约80％的受试者在某些视频零件中查看了同一图像区域，但可变性通常要大得多。然后将天然电影的眼动运动与几种控制条件下的眼动。 “定格”电影的语义内容几乎与原始视频相同，但缺乏连续的动作。好莱坞动作电影预告片被用来探究眼动的上限连贯性，这可以通过刻意的相机工作，场景剪裁等实现。 。结果表明，对于一般眼动参数，例如扫视幅度和固定持续时间以及眼动运动的变化，条件之间的几个系统差异。最重要的是，静态图像上的眼睛运动最初是由刺激的发作效应驱动的，更后的是，比连续视频更重要的是受主体特定的特质。好莱坞电影上的眼睛动作比自然电影的眼动更加连贯。我们得出的结论是，实验室实验，静态图像和专业剪切材料中经常使用的刺激类型并不是自然观看行为的代表。所有刺激和凝视数据均可在http://www.inb.uni-luebeck.de/tools-demos/gaze上公开获得。
How similar are the eye movement patterns of different subjects when free viewing dynamic natural scenes? We collected a large database of eye movements from 54 subjects on 18 high-resolution videos of outdoor scenes and measured their variability using the Normalized Scanpath Saliency, which we extended to the temporal domain. Even though up to about 80% of subjects looked at the same image region in some video parts, variability usually was much greater. Eye movements on natural movies were then compared with eye movements in several control conditions. "Stop-motion" movies had almost identical semantic content as the original videos but lacked continuous motion. Hollywood action movie trailers were used to probe the upper limit of eye movement coherence that can be achieved by deliberate camera work, scene cuts, etc. In a "repetitive" condition, subjects viewed the same movies ten times each over the course of 2 days. Results show several systematic differences between conditions both for general eye movement parameters such as saccade amplitude and fixation duration and for eye movement variability. Most importantly, eye movements on static images are initially driven by stimulus onset effects and later, more so than on continuous videos, by subject-specific idiosyncrasies; eye movements on Hollywood movies are significantly more coherent than those on natural movies. We conclude that the stimuli types often used in laboratory experiments, static images and professionally cut material, are not very representative of natural viewing behavior. All stimuli and gaze data are publicly available at http://www.inb.uni-luebeck.de/tools-demos/gaze.