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Sensors 2017, 17(2), 291; doi:10.3390/s17020291

A Spot Reminder System for the Visually Impaired Based on a Smartphone Camera

1
University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8573, Ibaraki, Japan
2
Aichi University of Education, 1 Hirosawa, Igaya, Kariya 448-8542, Aichi, Japan
3
National Institute of Technology, Toba College, 1-1 Ikegami, Toba 517-8501, Mie, Japan
4
Aichi Institute of Technology, 1247 Yachigusa, Yakusa, Toyota 470-0392, Aichi, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 27 October 2016 / Revised: 20 January 2017 / Accepted: 23 January 2017 / Published: 4 February 2017
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [1807 KB, uploaded 4 February 2017]   |  

Abstract

The present paper proposes a smartphone-camera-based system to assist visually impaired users in recalling their memories related to important locations, called spots, that they visited. The memories are recorded as voice memos, which can be played back when the users return to the spots. Spot-to-spot correspondence is determined by image matching based on the scale invariant feature transform. The main contribution of the proposed system is to allow visually impaired users to associate arbitrary voice memos with arbitrary spots. The users do not need any special devices or systems except smartphones and do not need to remember the spots where the voice memos were recorded. In addition, the proposed system can identify spots in environments that are inaccessible to the global positioning system. The proposed system has been evaluated by two experiments: image matching tests and a user study. The experimental results suggested the effectiveness of the system to help visually impaired individuals, including blind individuals, recall information about regularly-visited spots. View Full-Text
Keywords: spot reminder; visually impaired individuals; smartphone cameras; scale invariant feature transform; image matching; user study spot reminder; visually impaired individuals; smartphone cameras; scale invariant feature transform; image matching; user study
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Takizawa, H.; Orita, K.; Aoyagi, M.; Ezaki, N.; Mizuno, S. A Spot Reminder System for the Visually Impaired Based on a Smartphone Camera. Sensors 2017, 17, 291.

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