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cs.DB1998
Efficient Retrieval of Similar Time Sequences Using DFT
Davood Rafiei, Alberto Mendelzon
We propose an improvement of the known DFT-based indexing technique for fast retrieval of similar time sequences. We use the last few Fourier coefficients in the distance computati…
cs.DB1998
Similarity-Based Queries for Time Series Data
Davood Rafiei, Alberto Mendelzon
We study a set of linear transformations on the Fourier series representation of a sequence that can be used as the basis for similarity queries on time-series data. We show that o…