A novel document ranking method using the discrete cosine transform

@article{Park2005AND,
  title={A novel document ranking method using the discrete cosine transform},
  author={Laurence Anthony F. Park and Marimuthu Palaniswami and Kotagiri Ramamohanarao},
  journal={IEEE Transactions on Pattern Analysis and Machine Intelligence},
  year={2005},
  volume={27},
  pages={130-135}
}
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. 

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