Real-time sidewalk slope calculation through integration of GPS trajectory and image data to assist people with disabilities in navigation

Lu, Y and Karimi, HA (2015) Real-time sidewalk slope calculation through integration of GPS trajectory and image data to assist people with disabilities in navigation. ISPRS International Journal of Geo-Information, 4 (2). 741 - 753.

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Abstract

People with disabilities face many obstacles in everyday outdoor travels. One of the most notable obstacles is steep slope on sidewalk segments. Current navigation systems/services do not all support map databases with slope attributes and cannot calculate sidewalk slope in real time. In this paper, we present a technique for calculating slopes of sidewalk segments by image data and predict the most suitable route for each individual user through integration with GPS trajectory. In our technique we make use of GPS trajectory data, to identify the sidewalk segment on which the traveler will most probably pass, and images of the identified sidewalk segment. Through edge detection techniques we detect edges of objects, such as buildings, billboards, and walls, in the background. Slope of the segment is then calculated by comparing its line representation in the map with the detected edges. Our experiment result indicates effective calculation of sidewalk slopes.

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Details

Item Type:	Article
Status:	Published
Creators/Authors:	Creators Email Pitt Username ORCID Lu, Y Karimi, HA hkarimi@pitt.edu HKARIMI 0000-0001-5331-5004
Date:	1 June 2015
Date Type:	Publication
Access Restriction:	No restriction; Release the ETD for access worldwide immediately.
Journal or Publication Title:	ISPRS International Journal of Geo-Information
Volume:	4
Number:	2
Page Range:	741 - 753
DOI or Unique Handle:	10.3390/ijgi4020741
Institution:	University of Pittsburgh
Schools and Programs:	School of Information Sciences > Information Science
Refereed:	Yes
Date Deposited:	19 Jun 2015 17:05
Last Modified:	30 Mar 2021 13:55
URI:	http://d-scholarship.pitt.edu/id/eprint/25412

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