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Seeing biological motion

机译：看到生物运动

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One of the more stunning examples of the resourcefulness of human vision is the ability to see 'biological motion', which was first shown with an adaptation of earlier cinematic work: illumination of only the joints of a walking person is enough to convey a vivid, compelling impression of human animation, although the percept collapses to a jumble of meaningless lights when the walker stands still. The information is sufficient to discriminate the sex and other details of the walker, and can be interpreted by young infants. Here we measure the ability of the visual system to integrate this type of motion information over space and time, and compare this capacity with that for viewing simple translational motion. Sensitivity to biological motion increases rapidly with the number of illuminated joints, far more rapidly than for simple motion. Furthermore, this information is summed over extended temporal intervals of up to 3 seconds (eight times longer than for simple motion). The steepness of the summation curves indicates that the mechanisms that analyse biological motion do not integrate linearly over space and time with constant efficiency, as may occur for other forms of complex motion, but instead adapt to the nature of the stimulus.
机译：人类视觉的机敏性更令人惊叹的例子之一是能够看到“生物动作”，这首先是对早期电影作品的改编：仅对步行者的关节进行照明就足以传达生动，令人印象深刻的人类动画印象，尽管当步行者静止不动时，感觉会崩溃成一堆毫无意义的灯光。该信息足以区分学步车的性别和其他细节，并且可以由幼儿解释。在这里，我们测量视觉系统在空间和时间上整合此类运动信息的能力，并将这种能力与查看简单平移运动的能力进行比较。随着被照亮关节的数量，对生物运动的敏感度迅速增加，远远快于简单运动。此外，此信息在最长3秒的扩展时间间隔内求和（比简单运动的时间长八倍）。求和曲线的陡峭性表明，分析生物运动的机制并未像其他形式的复杂运动那样，在空间和时间上线性地以恒定效率进行线性积分，而是适应了刺激的本质。

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