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Sparse Representation (Cont.)
2012-3-23 23:28
Sparse Representation (Cont.)
1. Uniqueness Theorem 2.1. For an arbitrary pair of orthogonal bases Ψ , Φ with mutual-coherence μ (A), and for an arbitrary non-zero vector b ∈ IR n with representations α and β correspondingly,the following inequality holds ...
个人分类: Signal processing|5421 次阅读|没有评论
An introduction to Sparse Representation
热度 1 2012-3-23 22:33
An introduction to Sparse Representation
Preliminaries A full-rank matrix A ∈ Rn×m with n m generates an underdetermined system of linearequations Ax = b having infinitely many solutions.Suppose we seek the sparsest solution,i.e., the one with the fewest nonzero entries. Can it ever be unique? If so, when? As optimizat ...
个人分类: Signal processing|5541 次阅读|2 个评论 热度 1

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