Ballard Dana H, Hayhoe Mary M
Center for Perceptual Systems, University of Texas, Austin, TX, USA.
Vis cogn. 2009 Aug 1;17(6-7):1185-1204. doi: 10.1080/13506280902978477.
Gaze changes and the resultant fixations that orchestrate the sequential acquisition of information from the visual environment are the central feature of primate vision. How are we to understand their function? For the most part, theories of fixation targets have been image based: The hypothesis being that the eye is drawn to places in the scene that contain discontinuities in image features such as motion, colour, and texture. But are these features the cause of the fixations, or merely the result of fixations that have been planned to serve some visual function? This paper examines the issue and reviews evidence from various image-based and task-based sources. Our conclusion is that the evidence is overwhelmingly in favour of fixation control being essentially task based.
注视变化以及由此产生的注视行为，它们协调着从视觉环境中按顺序获取信息，是灵长类动物视觉的核心特征。我们该如何理解它们的功能呢？在很大程度上，关于注视目标的理论一直是基于图像的：其假设是眼睛会被场景中包含图像特征（如运动、颜色和纹理）不连续的地方所吸引。但这些特征是注视行为的原因，还是仅仅是为了实现某种视觉功能而预先计划的注视行为的结果呢？本文探讨了这个问题，并回顾了来自各种基于图像和基于任务的证据来源。我们的结论是，证据压倒性地支持注视控制本质上是基于任务的。
