仿真假体视觉下基于触觉感知的光幻视尺寸特性研究

发布时间：2018-02-24 12:52

本文关键词： 视觉假体模拟假体视觉光幻视触觉匹配板大小知觉　出处：《上海交通大学》2009年硕士论文　论文类型：学位论文

【摘要】： 视觉假体旨在用电刺激的方法帮助盲人修复视觉。在假体植入后,通过刺激盲人视觉通路,可以诱发出离散的视觉感受——光幻视。而假体植入者“看到”图像是由光幻视组成的。光幻视现象可以说是视觉假体研究中的基础。那么,准确地描述光幻视的大小,形状,位置等特征,就具有重要的指导意义了。本课题主要研究了基于触觉感知的仿真假体视觉环境中的光幻视尺寸特性。本课题的研究内容包括两个阶段:在第一个阶段的研究中,设计了第一套触觉尺寸匹配板(圆孔触摸板),并在该尺寸匹配板的基础上开展了四个实验,分别研究观察距离,光幻视亮度、位置以及闪烁等参数对光幻视尺寸评估结果的影响;在前一研究的基础上,增加了一套触觉尺寸匹配板(圆柱触摸板),通过开展心理物理学实验,研究不同触觉刺激方式对尺寸匹配的结果的影响。我们得出的主要结论有:(一)触觉尺寸匹配板能准确表达受试者所感知的光幻视的大小;(二)刺激亮度对光幻视的大小知觉有显著影响,一般而言,匹配结果的准确度随着亮度的增加而增加;(三)匹配结果随着光幻视在视野中位置的偏心率的增加而变差;(四)闪烁的光幻视知觉起来比静止时的稍大;(五)圆柱触摸板比圆孔触摸更能准确表达受试者所感知的光幻视大小。
[Abstract]:Visual prostheses are designed to help blind people repair their vision by using electrical stimulation. It can induce discrete visual perception-light vision. And the prosthetic implant "see" image is composed of light vision. Optical vision phenomenon can be said to be the basis of the study of visual prosthesis. Then, accurately describe the size and shape of optical illusion. Location and other features have important guiding significance. This paper mainly studies the size characteristics of optical illusion in the visual environment of simulated prosthesis based on tactile perception. In the first stage, we designed the first set of tactile size matching board (round hole touch pad), and carried out four experiments on the basis of the size matching board to study the observation distance. The influence of luminance, position and scintillation on the size evaluation of optical hallucination. Based on the previous study, a set of tactile size matching plate (cylindrical touch pad) was added. The effects of different tactile stimuli on the size matching results were studied. Our main conclusions are that: (1) the tactile size matching board can accurately express the size of the light illusion perceived by the subjects. (2) the stimulus brightness has a significant effect on the size perception of the optical illusion, generally speaking, The accuracy of matching results increases with the increase of brightness (3) the matching results become worse with the increase of eccentricity of the position of optical illusion in the field of vision (4) the blinking optical illusion perception is slightly larger than that at rest (5) circles. The column touch pad is more accurate than the round-hole touch in expressing the size of the light illusion perceived by the subjects.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2009
【分类号】：R314

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