Homotopy based algorithms for ${\ell }_0$-regularized least-squares

Charles Soussen, Jérôme Idier, Junbo Duan +1

Sparse signal restoration is usually formulated as the minimization of a quadratic cost function $\Vert y-Ax{\Vert }_2^2$, where A is a dictionary and x is an unknown sparse vector. It is we…