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Influence of the size of the field of view on motion perception

机译：视场大小对运动感知的影响

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摘要

Efficient navigation requires a good representation of body position/orientation in the environment and an accurate updating of this representation when the body-environment relationship changes. Such updating is based on the ability to correctly estimate the speed and amplitude of body displacements. Because navigation in virtual worlds often relies on the sole visual information, we investigated to which extent the size of the field of view (FoV) affects two basic aspects of motion perception: (ⅰ) the perceived amplitude of rotations about the body vertical axis (Experiment 1) and (ⅱ) the perceived speed of forward translations (Experiment 2).rnConcerning the perception of rotation amplitude, we found that visual flow information gives rise to inaccurate and very variable estimations, with a systematic underestimation of rotations larger than 30°. We also found that the accuracy of the estimations does not depend on the size of the FoV and that horizontal FoVs larger than 30° do not improve the performance. Concerning speed perception, central FoVs smaller than 60° gave rise to an underestimation of the visual speed. On the other hand, occluding the central area leaving only peripheral visual information available induced a systematic over-estimation of visual speed, even when only the central 10° of vision was occluded. Taken together, these results suggest that large FoVs are not required to estimate the amplitude of visual rotations about the vertical axis of the body, whereas central FoVs of at least 60° are advisable when speed perception relies on visual flow information.
机译：高效的导航需要在环境中很好地表示身体的位置/方向，并且当身体与环境的关系发生变化时，必须对此表示进行准确的更新。这种更新基于正确估计身体位移的速度和幅度的能力。由于虚拟世界中的导航通常依赖于唯一的视觉信息，因此我们研究了视场（FoV）的大小在多大程度上影响了运动感知的两个基本方面：（ⅰ）绕身体垂直轴旋转的感知幅度（实验1）和（ⅱ）感知到的平移速度（实验2）.rn关于旋转幅度的感知，我们发现视觉流信息会导致不准确且变化很大的估计，而系统地低估了大于30°的旋转。我们还发现估计的准确性不取决于FoV的大小，并且水平FoV大于30°不会改善性能。关于速度感知，小于60°的中心FoV导致视觉速度的低估。另一方面，遮挡中心区域仅留下可用的外围视觉信息，即使仅遮挡了中心的10°视觉，也会导致视觉速度的系统过高估计。综上所述，这些结果表明不需要大的FoV来估计围绕身体垂直轴的视觉旋转幅度，而当速度感知依赖于视觉流信息时，建议至少60°的中心FoV。

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  • 来源
    《Computers & Graphics》 |2009年第2期|139-146|共8页
  • 作者

    P. Pretto; M. Ogier; H.H. Buelthoff; J.-P. Bresciani;

  • 作者单位

    Max Planck Institute for Biological Cybernetics, Department of Cognitive and Computational Psychophysics, Tubingen, Germany;

    Max Planck Institute for Biological Cybernetics, Department of Cognitive and Computational Psychophysics, Tubingen, Germany;

    Max Planck Institute for Biological Cybernetics, Department of Cognitive and Computational Psychophysics, Tubingen, Germany;

    Max Planck Institute for Biological Cybernetics, Department of Cognitive and Computational Psychophysics, Tubingen, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    vision; optic flow; motion perception; field of view;

    机译：视力;光流运动感知;视场;

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