期刊
VISION RESEARCH
卷 46, 期 12, 页码 1857-1862出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.visres.2005.12.005
关键词
eye movement; salience; image features; natural images; saccade amplitude; task
资金
- Engineering and Physical Sciences Research Council [EP/C516303/1, GR/S47953/01] Funding Source: researchfish
We recorded over 90,000 saccades while observers viewed a diverse collection of natural images and measured low level visual features at fixation. The features that discriminated between where observers fixated and where they did not varied considerably with task, and the length of the preceding saccade. Short saccades (< 8 degrees) are image feature dependent, long are less so. For free viewing, short saccades target high frequency information, long saccades are scale-invariant. When searching for luminance targets, saccades of all lengths are scale-invariant. We argue that models of saccade behaviour must account not only for task but also for saccade length and that long and short saccades are targeted differently. (c) 2006 Elsevier Ltd. All rights reserved.
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