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A Novel Obstacle Detection Method based on Deformable Grid for the Visually Impaired

Authors
Kang, Mun-CheonChae, Sung-HoSun, Jee-YoungYoo, Jin-wooKo, Sung-Jea
Issue Date
8월-2015
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Keywords
Obstacle detection; collision detection; visually impaired; Electronic Travel Aids (ETA); Time to Contact (TTC)
Citation
IEEE TRANSACTIONS ON CONSUMER ELECTRONICS, v.61, no.3, pp.376 - 383
Indexed
SCIE
SCOPUS
Journal Title
IEEE TRANSACTIONS ON CONSUMER ELECTRONICS
Volume
61
Number
3
Start Page
376
End Page
383
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/92893
ISSN
0098-3063
Abstract
To assist visually impaired people, a variety of obstacle detection (OD) methods with the monocular vision have been developed. Most conventional OD methods detect the obstacle by using the variation of the motion vector or the object size between two consecutive image frames. However, the OD performance using the short-term variation is significantly affected by the tracking error, which leads to inaccurate OD results. To cope with this problem, this paper presents a novel OD method based on a new structure, called Deformable Grid (DG). The DG is initially a regular grid-shaped, but it can be deformed gradually depending on the motion of the object in the scene. The proposed method detects the object at risk of collision based on the degree of the deformation of the DG. Experimental results demonstrate that the proposed OD method outperforms the conventional ones in terms of processing time as well as accuracy
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