Assisting the visually impaired: obstacle detection and warning system by acoustic feedback.
Assisting the visually impaired: obstacle detection and warning system by acoustic feedback.
复制标题
帮助视障人士：通过声音反馈进行障碍物检测和警告系统。
DOI：
10.3390/s121217476
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发表时间：
2012-12-17
期刊：
影响因子：
--
通讯作者：
Cela A
中科院分区：
文献类型：
--
作者：
Rodríguez A;Yebes JJ;Alcantarilla PF;Bergasa LM;Almazán J;Cela A
本文的目的是设计一个辅助视障人士的障碍物侦测系统。从用户携带的立体相机的图像计算密集视差图。通过使用密集视差图，可以在室内和室外场景中以3D方式检测潜在的障碍物。基于RANSAC加滤波技术的地平面估计算法允许在每帧中对地面进行鲁棒检测。提出了一种极坐标网格表示法来表示场景中的潜在障碍物。该设计是完成与声学反馈，以协助视障用户，而接近障碍。具有不同频率和重复的蜂鸣声通知用户存在障碍物。音频骨传导技术用于播放这些声音，而不会中断视障用户从其本地环境中听到其他重要声音。四个视障志愿者参与的用户研究支持所提出的系统。
The aim of this article is focused on the design of an obstacle detection system for assisting visually impaired people. A dense disparity map is computed from the images of a stereo camera carried by the user. By using the dense disparity map, potential obstacles can be detected in 3D in indoor and outdoor scenarios. A ground plane estimation algorithm based on RANSAC plus filtering techniques allows the robust detection of the ground in every frame. A polar grid representation is proposed to account for the potential obstacles in the scene. The design is completed with acoustic feedback to assist visually impaired users while approaching obstacles. Beep sounds with different frequencies and repetitions inform the user about the presence of obstacles. Audio bone conducting technology is employed to play these sounds without interrupting the visually impaired user from hearing other important sounds from its local environment. A user study participated by four visually impaired volunteers supports the proposed system.
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DOI：
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发表时间：
2010-01-01
期刊：
IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS PART C-APPLICATIONS AND REVIEWS
影响因子：
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作者：
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通讯作者：
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DOI：
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发表时间：
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影响因子：
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