Fig. 1From: Robust compressive sensing of sparse signals: a reviewComparison of the ℓ 1 (black) norm, the Huber cost function with c=0.75 (magenta), and the Lorentzian norm with γ=1 (blue) and γ=0.1 (green) for the-one dimensional case. The squared ℓ 2 norm (red) is plotted as referenceBack to article page