Sparse image representation by discrete cosine/spline based dictionaries

@article{Bowley2009SparseIR,
  title={Sparse image representation by discrete cosine/spline based dictionaries},
  author={James Bowley and Laura Rebollo-Neira},
  journal={CoRR},
  year={2009},
  volume={abs/0909.1310}
}
Mixed dictionaries generated by cosine and B-spline functions are considered. It is shown that, by highly nonlinear approaches such as Orthogonal Matching Pursuit, the discrete version of the proposed dictionaries yields a significant gain in the sparsity of an image representation. 

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