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We propose a new Spectral text retrieval method using the Discrete Cosine Transform (DCT). By taking advantage of the properties of the DCT and by employing the fast query and compression techniques found in vector space methods (VSM), we show that we can process queries as fast as VSM and achieve a much higher precision.
Indexing methods, information search and retrieval, fast fourier transforms.
Laurence A.F. Park, Marimuthu Palaniswami, Kotagiri Ramamohanarao, "A Novel Document Ranking Method Using the Discrete Cosine Transform", IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 27, no. , pp. 130-135, January 2005, doi:10.1109/TPAMI.2005.2
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