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On Improving Geotag Quality in Photo Collections

Authors:
Yuri Almeida Lacerda
Hugo Feitosa de Figueirêdo
João Paulo Ribeiro da Silva
Daniel Farias Batista Leite
Anselmo Cardoso de Paiva
Cláudio de Souza Baptista

Keywords: Geotag; Photo Metadata; GeotagPropagation; Metadata Inconsistency Detection

Abstract:
Digital cameras equipped with GPS receivers allow storing geographic location into the photograph metadata. Geographic location constitutes a very important information to be used in systems that retrieve and organize photographs. However, cameras equipped with GPS may store either invalid or null geographic locations. This is usually due to a delay in obtaining the GPS signal. In this paper, we propose a new method for detection of inconsistencies of geographic locations in photograph metadata and for propagation of the geographic location annotation for these photographs. Besides, we also propose the incorporation of these methods in a Web-based system for correction and annotation of geotags. Another contribution of this work is the presentation of a case study to validate the system. The results prove that the proposed techniques increase precision (through the detection of inconsistencies) and recall (through the propagation of the geographic locations) in the retrieval of georeferenced photographs.

Pages: 139 to 144

Copyright: Copyright (c) IARIA, 2013

Publication date: February 24, 2013

Published in: conference

ISSN: 2308-393X

ISBN: 978-1-61208-251-6

Location: Nice, France

Dates: from February 24, 2013 to March 1, 2013