仿真假体视觉下的单目测距研究

Monocular vision distance measurement under simulated prosthesis vision

为了研究假体佩戴者是否具有异常的立体视觉,影响目标定位,在现实场景中开展仿真假体视觉下单目测距研究。实验采用蒙眼测距方法,被试者佩戴头戴式显示器模拟在仿真假体单眼,仿真假体双眼以及在正常单眼情况观察判断放在地板上不同位置(3.51 m,4.92 m,6.33 m)的目标物体,通过蒙着眼睛轻快地走到他/她所判断的地方,记录并统计分析行走距离。实验结果发现,在三种观察条件下,正常单眼感知精度最高,仿真假体单眼最低。随着物体放置距离的增加,准确度也有细微下降。经统计分析发现,仿真假体单眼与正常单眼对距离判断没显著性差异,说明假体植入者能准确定位地面上的目标。

A research on monocular vision distance measurement under simulated prosthesis vision is performed in real scene to study whether prosthesis wearers have abnormal stereoscopic vision that affects target positioning.In the experiment,the subjects wore a head⁃mounted display to simulate the conditions of simulated prosthetic monocular,simulated prosthetic binoculus and normal human monocular,observe and judge the target objects placed on the floor at different positions(3.51 m,4.92 m and 6.33 m)by means of the blindfold distance measurement method,and record and analyze the walking distance statistically by briskly walking with blindfold to where he/she judges.The experimental results show that,under the three observation conditions,the normal human monocular has the highest perception precision while the simulated prosthetic monocular is the lowest one.With the increasing of distance placing the object,the distance measurement accuracy is also reduced slightly.The statistical analysis results show that there is no significant difference in the distance measurement of the prosthetic monocular and the normal human monocular,which indicates that the visual prosthesis wearer can accurately locate the target on the ground.