虚拟现实技术在假体视觉下出行任务的应用

Application of Virtual Reality Technology in Travel Tasks Under Prosthetic Vision

为了探究视障人士在植入视觉假体后,视野、分辨率、物体种类数量对识别准确率的影响,利用虚拟现实技术对假体佩戴者完成出行提供训练的可行性。利用Unity在虚拟环境中设计并搭建识别任务和出行任务实验场景,通过虚拟现实(Virtual Reality,VR)设备完成实验。结果表明,被试者的识别准确率随视野增大而减小,随分辨率增大而增大,低分辨率情况下更多光幻视点呈现在更小的视野下有利于识别,被试者在出行任务返回过程的碰撞次数显著低于出发过程的碰撞次数。可见,虚拟现实技术为假体佩戴者出行提供训练具有可行性。

To investigate the effects of visual field,resolution and number of object types on recognition accuracy in patients with visual impairment after implantation of visual prostheses,and the feasibility of virtual reality technology providing training for prosthetic wearers to complete travel.Design and build recognition and travel task experimental scenarios using Unity in a virtual environment,and complete the experiments using Virtual Reality(VR)devices.The results showed that the recognition accuracy of the subjects decreased with the increase of field of view and increased with the increase of resolution.In low resolution situations,more optical illusion viewpoints were presented in smaller fields of view,which was more conducive to recognition.The collision frequency of the envoy during the return process of the travel task is significantly lower than that during the departure process,and virtual reality technology is feasible for providing training for prosthetic wearers during travel.