time-frequency decompositionsA new approach for signal expansion with respect to hybrid dictionaries, based upon probabilistic modeling is proposed and studied. The signal is modeled as a sparse linear combinat
Sparsity assumption is the basis of compressed sensing. It has a crucial role in our proposed method of image encryption. The goal of compressed sensing is to recover an unknown sparse signal\({\mathbf{s}} \in R^{m}\)from a set of underdetermined measurements\({\mathbf{y}} = {\mathbf...