Kobayashi Mikako, Motoyoshi Isamu
The University of Tokyo, Tokyo, Japan.
Iperception. 2019 Jul 19;10(4):2041669519860544. doi: 10.1177/2041669519860544. eCollection 2019 Jul-Aug.
The visual system uses the physical laws of nature as constraints for perceiving objects and events. Images violating natural laws would therefore tend to be perceived as unnatural. To understand vision's implicit knowledge of natural speed in the real world, we examined visual tolerance to artificial speed deviations in 22 natural movies. For most movies, perception could tolerate deviations from original speed by as much as a factor 2×. However, for movies including human body movements or falling objects, perception only tolerated a significantly narrower range of speed deviations. In general, human observers are poor at judging the naturalness of speed in natural scenes except for events involving gravitational or biological motions.
视觉系统将自然物理规律用作感知物体和事件的约束条件。因此，违反自然规律的图像往往会被视为不自然。为了理解视觉系统对现实世界中自然速度的隐性认知，我们研究了22部自然电影中视觉对人为速度偏差的耐受性。对于大多数电影，感知能够容忍高达2倍的原始速度偏差。然而，对于包含人体运动或落体的电影，感知仅能容忍明显更窄的速度偏差范围。总体而言，除了涉及重力或生物运动的事件外，人类观察者在判断自然场景中速度的自然程度方面表现不佳。
