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对自然主义场景的感知运动流的心理物理测量
Yung-Hao Yang1, Taiki Fukiage2, Zitang Sun1
1Cognitive Informatics Laboratory, Graduate School of Informatics, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan.
人类在复杂场景中对视觉运动的感知被用一种新的心理物理方法测量. 结果显示了与实际运动的一致偏差,称为流动幻觉,提供了对视觉处理的洞察.
科学领域:
- 神经科学是一个神经科学.
- 计算视觉 计算机视觉 计算机视觉
- 心理物理学的精神物理.
背景情况:
- 视觉运动感知对于导航和交互至关重要.
- 现有的研究主要集中在简单的刺激上,忽视了复杂的自然场景.
- 人类对自然环境中的光流的感知仍然不太清楚.
研究的目的:
- 开发和使用一种新的心理物理方法来量化人类对自然现场运动流动的感知.
- 为了识别感知和实际运动 (流动幻觉) 之间的差异.
- 调查这些流动幻觉的潜在神经和计算机制.
主要方法:
- 开发了一种心理物理技术,结合了局部向量匹配和闪光探测器.
- 利用自然主义电影作为视觉刺激.
- 将人类感知的流量与地面真相流和计算模型的预测进行了比较.
主要成果:
- 感知运动流在很大程度上与自然主义场景中的地面真相流相一致.
- 在特定的点上观察到与基本真相 (流动幻觉) 的持续偏差.
- 流动幻觉与低级因素 (时空聚合,信号损失) 和高级计算 (矢量分解) 相关.
结论:
- 开发的心理物理范式有效地测量了人类在复杂场景中感知到的运动流.
- 流动幻觉为视觉运动感知机制提供了宝贵的见解.
- 结果突出了低级和高级处理在解释动态视觉信息中的相互作用.
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