GeoPix: image retrieval on the geo web, from camera click to mouse click
Proceedings of the 8th conference on Human-computer interaction with mobile devices and services
Multiple-access insights from bounds on sensor localization
Pervasive and Mobile Computing
Toward Fully Automatic Geo-Location and Geo-Orientation of Static Outdoor Cameras
WACV '08 Proceedings of the 2008 IEEE Workshop on Applications of Computer Vision
PCM '09 Proceedings of the 10th Pacific Rim Conference on Multimedia: Advances in Multimedia Information Processing
Geo-spatial Tagging of Image Collections Using Temporal Camera Usage Dynamics
ISPAN '09 Proceedings of the 2009 10th International Symposium on Pervasive Systems, Algorithms, and Networks
A simple content-based strategy for estimating the geographical location of a webcam
PCM'10 Proceedings of the 11th Pacific Rim conference on Advances in multimedia information processing: Part I
Determining the Geographical Location of Image Scenes based on Object Shadow Lengths
Journal of Signal Processing Systems
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A simple and low cost strategy for implementing pervasive objects that identify and track their own geographical location is proposed. The strategy, which is not reliant on any GIS infrastructure such as GPS, is realized using an electronic artifact with a built in clock, a light sensor, or low-cost digital camera, persistent storage such as flash and sufficient computational circuitry to make elementary trigonometric computations. The object monitors the lighting conditions and thereby detects and tracks the sunrise and sunset times. By the means of a simple celestial model an estimate of the geographical position of the object can be made. An intelligent light sampling method is proposed allowing the object to sleep most of the time and hence save battery power. The strategy is energy efficient and the speed of convergence can be adjusted as a function of the energy consumed. Objects employing the method can therefore operate for long times without recharging their batteries. The strategy has applications in mobile sensor networks where nodes need to log geographical information, sensing equipment such as floating buoyancies, or pervasive technologies in need of geospatial information such as digital cameras, mobile devices, etc.