Real-Time Walk Light Detection with a Mobile Phone.
Real-Time Walk Light Detection with a Mobile Phone.
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DOI：
10.1007/978-3-642-14100-3_34
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发表时间：
2010-07
期刊：
影响因子：
--
通讯作者：
Shen H
中科院分区：
文献类型：
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作者：
Ivanchenko V;Coughlan J;Shen H
穿越城市交通路口是盲人或视障人士出行中最危险的活动之一。基于作者过去在人行横道与人行横道的适当对齐问题上的工作，本文讨论了知道何时过马路的补充问题。我们描述了一个便携式原型系统，一旦步行灯亮起，它就会实时提醒用户。该系统在一部现成的诺基亚N95手机上作为软件应用程序运行，使用计算机视觉算法分析内置摄像头获取的视频，以实时确定当前是否可以看到步行灯。一旦检测到步行灯，就会响起音频提示用户。在城市交通路口对一名盲人志愿者进行的实验证明了该系统的概念，当步行灯出现时，该系统成功地提醒了受试者。
Crossing an urban traffic intersection is one of the most dangerous activities of a blind or visually impaired person's travel. Building on past work by the authors on the issue of proper alignment with the crosswalk, this paper addresses the complementary issue of knowing when it is time to cross. We describe a prototype portable system that alerts the user in real time once the Walk light is illuminated. The system runs as a software application on an off-the-shelf Nokia N95 mobile phone, using computer vision algorithms to analyze video acquired by the built-in camera to determine in real time if a Walk light is currently visible. Once a Walk light is detected, an audio tone is sounded to alert the user. Experiments with a blind volunteer subject at urban traffic intersections demonstrate proof of concept of the system, which successfully alerted the subject when the Walk light appeared.