Determining a Blind Pedestrian's Location and Orientation at Traffic Intersections.
Determining a Blind Pedestrian's Location and Orientation at Traffic Intersections.
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DOI：
10.1007/978-3-319-08596-8_65
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Coughlan, James M
中科院分区：
文献类型：
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作者：
Fusco, Giovanni;Shen, Huiying;Murali, Vidya;Coughlan, James M
本文介绍了Crosswatch的最新进展，Crosswatch是作者开发的一种基于智能手机的计算机视觉系统，用于在交通路口为盲人和视障行人提供引导。Crosswatch的关键功能之一是确定用户的位置（精度比GPS更高）和相对于他/她当前所站十字路口的人行横道标记的方向;这种功能将用于帮助他/她找到十字路口的重要特征，如步行灯，按钮和人行横道，并实现与这些特征的正确对齐。我们报告的两个新的贡献，Crosswatch：（a）实验与修改后的用户界面，测试盲人志愿者参与者，这使得它更容易获得交叉口图像比以前版本的Crosswatch;和（B）演示系统的能力，以定位用户的精度比什么是可获得的GPS，以及它的能力，以估计用户的方向的一个例子。
This paper describes recent progress on Crosswatch, a smartphone-based computer vision system developed by the authors for providing guidance to blind and visually impaired pedestrians at traffic intersections. One of Crosswatch's key capabilities is determining the user's location (with precision much better than what is obtainable by GPS) and orientation relative to the crosswalk markings in the intersection that he/she is currently standing at; this capability will be used to help him/her find important features in the intersection, such as walk lights, pushbuttons and crosswalks, and achieve proper alignment to these features. We report on two new contributions to Crosswatch: (a) experiments with a modified user interface, tested by blind volunteer participants, that makes it easier to acquire intersection images than with previous versions of Crosswatch; and (b) a demonstration of the system's ability to localize the user with precision better than what is obtainable by GPS, as well as an example of its ability to estimate the user's orientation.