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In this paper, the authors describe the design and implementation of a distributed search system over a camera sensor network where each node is a search engine that senses, stores and searches information. The work involves innovation at many levels including local storage, local search, and distributed search, all of which are designed to be efficient under the resource constraints of sensor networks. The authors present an implementation of the search engine on a network of iMote2 sensor nodes equipped with low power cameras and extended flash storage. The authors evaluate the system for a dataset comprising book images, and demonstrate more than two orders of magnitude reduction in the amount of data communicated and up to 5x reduction in overall energy consumption over alternate techniques.
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