摘要
虚拟现实技术作为一种新兴的人机交互技术,有望被用于医学、康复等领域。虚拟现实体验会引发人们产生自运动感知(vection),研究表明这种感知会受虚拟场景运动方向和视场角的影响,然而,还没有一种定量的方法来分析虚拟现实场景在自运动感知中所起的作用。本文研究中,让55个健康志愿者观看虚拟现实头盔中呈现的分别绕着俯仰轴(pitch)和偏航轴(yaw)旋转的旋转鼓虚拟场景,每次观看的时长为90s,并口头报告自运动感知的首发时间和强度,再通过光流信息的一阶熵来估计虚拟场景的视觉信息量。实验结果显示,绕俯仰轴旋转的旋转鼓场景引发了较大的自运动感知,而该场景的光流熵在垂直方向上较大。本文实验从视觉信息量的角度证明大脑对垂直方向的感知更为敏感。
As an emerging technology, virtual reality is expected to be used in the field of medicine, rehabilitation and so on. A series of psychological phenomena, which have been reported, are affected by the rotational direction and the FOV of virtual reality scenes. However, there is no reported quantitative method to analyze the role of virtual reality scenes in vection perception. In this article, 55 participants were enrolled to view the virtual rotational drum rotating around Pitch axis and Yaw axis respectively, and were required to report vection onset and the strength orally. The two kinds of scenes were randomly displayed and repeated three times for each subject, and each display lasted for 90s. The information of the visual scenes was estimated by the first-order entropy of the optical flow. Vection perception was found to be stronger in Pitch rotation condition and the optical flow entropy of this scene was larger. In conclusion, the experiment verified that the brain is more sensitive to downward movement from the perspective of the information quantity of visual sense.
作者
韦妙鸾
林佳吟
刘汝娥
罗洁
WEI Miaoluan;LIN Jiayin;LIU Ru＇e;LUO Jie(School of Engineering, Sun Yat-sen University, Guangzhou Guangdong 510006, China;Key Laboratory of Sensor Technology and Biomedical Instrument of Guangdong Province, Guangzhou Guangdong 510006 ,China;Equipment Department of Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou Guangdong 510006,China)
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2018年第2期134-140,共7页
Journal of Guangxi Normal University:Natural Science Edition
基金
国家自然科学基金(61401430)
中央高校基本科研业务费(15lgpy25)
