Appearance-based indoor localization: a comparison of patch descriptor performance
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Published version
Author(s)
Rivera-Rubio, J
Alexiou, I
Bharath, AA
Type
Journal Article
Abstract
Vision is one of the most important of the senses, and humans use it extensively during navigation. We evaluated different types of image and video frame descriptors that could be used to determine distinctive visual landmarks for localizing a person based on what is seen by a camera that they carry. To do this, we created a database containing over 3 km of video-sequences with ground-truth in the form of distance travelled along different corridors. Using this database, the accuracy of localization—both in terms of knowing which route a user is on—and in terms of position along a certain route, can be evaluated. For each type of descriptor, we also tested different techniques to encode visual structure and to search between journeys to estimate a user’s position. The techniques include single-frame descriptors, those using sequences of frames, and both color and achromatic descriptors. We found that single-frame indexing worked better within this particular dataset. This might be because the motion of the person holding the camera makes the video too dependent on individual steps and motions of one particular journey. Our results suggest that appearance-based information could be an additional source of navigational data indoors, augmenting that provided by, say, radio signal strength indicators (RSSIs). Such visual information could be collected by crowdsourcing low-resolution video feeds, allowing journeys made by different users to be associated with each other, and location to be inferred without requiring explicit mapping. This offers a complementary approach to methods based on simultaneous localization and mapping (SLAM) algorithms.
Date Issued
2015-03-18
Date Acceptance
2015-03-05
Citation
Pattern Recognition Letters, 2015, 66, pp.109-117
ISSN
1872-7344
Publisher
Elsevier
Start Page
109
End Page
117
Journal / Book Title
Pattern Recognition Letters
Volume
66
Copyright Statement
© 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Sponsor
European Institute of Innovation and Technology - EIT
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000362271100013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
CODSE_P43048
Subjects
Science & Technology
Technology
Computer Science, Artificial Intelligence
Computer Science
Visual localization
Descriptors
Human-computer interaction
Assistive devices
Place cells
Navigation
Landmark
Memory
Artificial Intelligence & Image Processing
Electrical And Electronic Engineering
Cognitive Science
Publication Status
Published