dc.contributor.author | Sandnes, Frode Eika | |
dc.date.accessioned | 2010-11-11T11:29:44Z | |
dc.date.available | 2010-11-11T11:29:44Z | |
dc.date.issued | 2010-05-14 | |
dc.identifier.citation | Sandnes, F.E. (2010). Where was that photo taken? Deriving geographical information from image collections based on temporal exposure attributes. Multimedia Systems, 16 (4-5), 309-318 | en_US |
dc.identifier.issn | Print: 0942-4962 | |
dc.identifier.issn | Online: 1432-1882 | |
dc.identifier.uri | https://hdl.handle.net/10642/517 | |
dc.description.abstract | This paper demonstrates a novel strategy for
inferring approximate geographical information from the
exposure information and temporal patterns of outdoor
images in image collections. Image exposure is reliant on
light and most photographs are therefore taken in daylight
which again depends on the position of the sun. Clearly, the
sun results in different lighting conditions at different
geographical location and at different times of the day, and
hence the observed intensity patterns can be used to deduce
the approximate location of the photographer at the time
the photographs were taken. Images taken inside or at night
are temporally connected to the daylight images and the
geographical information can therefore be transferred to
related ‘‘dark’’ photographs. The strategy is efficient as it
only considers meta information and not image contents.
Large databases can therefore be indexed efficiently.
Experimental results demonstrate that the current approach
yields a longitudinal error of 15.7 and a latitudinal error of
30.5 for authentic image collections comprising a mixture
of outdoor and indoor images. The strategy determined the
correct hemisphere in all the tests. Although not as accurate
as GPS receiver, the geographical information is sufficiently
detailed to be useful. Applications include
improved image retrieval, image browsing and automatic
image tagging. The strategy does not require a GPS
receiver and can be applied to the existing digital image
collections. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Springer Verlag | en_US |
dc.relation.ispartofseries | Multimedia Systems;16 (4-5) | |
dc.subject | Image analysis | en_US |
dc.subject | Geolocation | en_US |
dc.subject | Geographical information system | en_US |
dc.subject | VDP::Teknologi: 500::Informasjons- og kommunikasjonsteknologi: 550::Geografiske informasjonssystemer: 555 | en_US |
dc.title | Where was that photo taken? : deriving geographical information from image collections based on temporal exposure attributes | en_US |
dc.type | Journal article | en_US |
dc.type | Peer reviewed | en_US |
dc.description.version | Postprint. The original publication is available at www.springerlink.com at URL: http://dx.doi.org/10.1007/s00530-010-0188-7 | en_US |
dc.identifier.doi | http://dx.doi.org/10.1007/s00530-010-0188-7 | |