Highly Nonlinear Approximations for Sparse Signal Representation

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Effective sparse representation of X-Ray medical images

High sparsity in the representation of X-Ray medical images is achieved by: (a) Creating a large redundant dictionary of suitable elements for the image decomposition in the wavelet domain and (b) Applying effective strategies for selecting the particular elements which enable the sparse decomposition of the wavelet coefficients.

"Effective sparse representation of X-Ray medical images"
by Laura Rebollo-Neira

The routines for implementing the methods in the paper are available here.

See below two examples of approximated images.

Original Image

Approximated Image

Original Image

Approximated Image