文档介绍：P-: Engineering a Low-Cost Wearable Low Vision Aid based on Retinal Light Scanning
Ryland C. Bryant, Cameron M. Lee, Robert A. Burstein, and Eric J. Seibel
Human Interface Technology Lab, University of Washington, Seattle, WA
Abstract
The Wearable Low Vision Aid (WLVA) is a portable system that uses machine vision to track potential walking hazards for the visually impaired. A scanning fiber display couples a laser diode to a vibrating optical fiber that projects a virtual image onto the retina to display warning icons that the visually impaired can recognize.
1. Introduction
Persons that are visually impaired have great difficulty navigating and avoiding obstacles as they walk even when using a cane or seeing eye dog and especially under low light levels. Both Massof [1] and Peli [2,3] have demonstrated the possibility bining video cameras and head mounted displays (HMDs) to create portable low vision enhancement devices. Massof developed a video see-through system capable of correcting for a number of vision disorders. A video see-through system projects an image from a head mounted video camera to a HMD that occludes the surrounding view. Peli used brighter light sources for an optical see-through system that may provide lower contrast overlaid images while not occluding the surrounding view.
Creating a portable, low-cost, assistive device to aid the visually imp