Learning of structured graph dictionaries

@article{Zhang2012LearningOS,
  title={Learning of structured graph dictionaries},
  author={Xuan Zhang and Xiaowen Dong and Pascal Frossard},
  journal={2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)},
  year={2012},
  pages={3373-3376}
}
We propose a method for learning dictionaries towards sparse approximation of signals defined on vertices of arbitrary graphs. Dictionaries are expected to describe effectively the main spatial and spectral components of the signals of interest, so that their structure is dependent on the graph information and its spectral representation. We first show how operators can be defined for capturing different spectral components of signals on graphs. We then propose a dictionary learning algorithm… CONTINUE READING
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Z. Zhang
Ph.D. dissertation, Courant Institute, New York University, 1993. • 1993
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