Computational account for the naturalness perception of others' jumping motion based on a vertical projectile motion model.

IF 3.8 1区 生物学 Q1 BIOLOGY
Takumi Yokosaka,Yusuke Ujitoko,Takahiro Kawabe
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引用次数: 0

Abstract

The visual naturalness of a rendered character's motion is an important factor in computer graphics work, and the rendering of jumping motions is no exception to this. However, the computational mechanism that underlies the observer's judgement of the naturalness of a jumping motion has not yet been fully elucidated. We hypothesized that observers would perceive a jumping motion as more natural when the jump trajectory was consistent with the trajectory of a vertical projectile motion based on Earth's gravity. We asked human participants to evaluate the naturalness of point-light jumping motions whose height and duration were modulated. The results showed that the observers' naturalness rating varied with the modulation ratios of the jump height and duration. Interestingly, the ratings were high even when the height and duration differed from the actual jump. To explain this tendency, we constructed computational models that predicted the theoretical trajectory of a jump based on the projectile motion formula and calculated the errors between the theoretical and observed trajectories. The pattern of the errors correlated closely with the participants' ratings. Our results suggest that observers judge the naturalness of observed jumping motion based on the error between observed and predicted jump trajectories.
基于垂直弹射运动模型的他人跳跃运动自然度感知计算方法。
渲染角色动作的视觉自然度是计算机制图工作中的一个重要因素,跳跃动作的渲染也不例外。然而,观察者判断跳跃动作是否自然的计算机制尚未完全阐明。我们假设,当跳跃运动的轨迹与基于地球引力的垂直弹射运动轨迹一致时,观察者会认为跳跃运动更加自然。我们让人类参与者对高度和持续时间均可调的点光源跳跃运动的自然程度进行评价。结果表明,观察者的自然度评分随跳跃高度和持续时间的调制比率而变化。有趣的是,即使高度和持续时间与实际跳跃不同,观察者的评分也很高。为了解释这种趋势,我们根据弹射运动公式构建了预测跳跃理论轨迹的计算模型,并计算了理论轨迹与观察轨迹之间的误差。误差的模式与参与者的评分密切相关。我们的结果表明,观察者会根据观察到的跳跃轨迹与预测到的跳跃轨迹之间的误差来判断观察到的跳跃动作是否自然。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.90
自引率
4.30%
发文量
502
审稿时长
1 months
期刊介绍: Proceedings B is the Royal Society’s flagship biological research journal, accepting original articles and reviews of outstanding scientific importance and broad general interest. The main criteria for acceptance are that a study is novel, and has general significance to biologists. Articles published cover a wide range of areas within the biological sciences, many have relevance to organisms and the environments in which they live. The scope includes, but is not limited to, ecology, evolution, behavior, health and disease epidemiology, neuroscience and cognition, behavioral genetics, development, biomechanics, paleontology, comparative biology, molecular ecology and evolution, and global change biology.
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