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A Similarity Metric for Retrieval of Compressed Objects: Application for Mining Satellite Image Time Series

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2 Author(s)
Gueguen, L. ; GET-Telecom Paris, Paris ; Datcu, M.

This paper addresses the problem of building an index of compressed object databases. We introduce an informational similarity measure based on the coding length of two part codes. Then, we present a methodology for compressing the database by taking into account interobject redundancies and by using the informational similarity measure. The method produces an index included in the code of the data volume. This index is built such that it contains the minimal sufficient information to discriminate the data-volume objects. Then, we present an optimal two-part coder for compressing spatio-temporal events contained in satellite image time series (SITS). The two-part coder allows us to measure similarity and then to derive an optimal index of SITS spatio-temporal events. The resulting index is representative of the SITS information content and enables queries based on information content.

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Knowledge and Data Engineering, IEEE Transactions on  (Volume:20 ,  Issue: 4 )