NDLI: Organizing photographs with geospatial and image semantics

Content Provider	Springer Nature Link
Author	Zhu, Zhu Xu, Chang
Copyright Year	2014
Abstract	The popularity of GPS-equipped gadgets and mapping mashup applications has motivated the growth of geotagged Web resources as well as georeferenced multimedia applications. More and more research attention have been put on mining collaborative knowledge from mass user-contributed geotagged contents. However, little attention has been paid to generating high-quality geographical clusters, which is an important preliminary data-cleaning process for most geographical mining works. Previous works mainly use geotags to derive geographical clusters. Simply using one channel information is not sufficient for generating distinguishable clusters, especially when the location ambiguity problem occurs. In this paper, we propose a two-level clustering framework to utilize both the spatial and the semantic features of photographs for clustering. For the first-level geoclustering phase, we cluster geotagged photographs according to their spatial ties to roughly partition the dataset in an efficient way. Then we leverage the textual semantics in photographs' annotation to further refine the grouping results in the second-level semantic clustering phase. To effectively measure the semantic correlation between photographs, a semantic enhancement method as well as a new term weighting function have been proposed. We also propose a method for automatic parameter determination for the second-level spectral clustering process. Evaluation of our implementation on real georeferenced photograph dataset shows that our algorithm performs well, producing distinguishable geographical cluster with high accuracy and mutual information.
Starting Page	53
Ending Page	61
Page Count	9
File Format	PDF
ISSN	09424962
Journal	Multimedia Systems
Volume Number	23
Issue Number	1
e-ISSN	14321882
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-11-05
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Geotagged image Content organization Geospatial and semantic Multimedia Information Systems Computer Communication Networks Operating Systems Data Storage Representation Data Encryption Computer Graphics
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Information Systems Media Technology Hardware and Architecture Software

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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