Fig. 4From: A fast and accurate algorithm for ℓ 1 minimization problems in compressive samplingNumerical results with Gaussian sensing matrices whose rows are orthonormalized. The relative ℓ 2 errors (the vertical axis with base 10 logarithmic scale) versus the iteration consumed (the horizontal axis) for a the noise-free case and b the noise case. The colors red, blue, and yellows represent the dynamic ranges of the tested signals with θ being 1, 3, and 5, respectivelyBack to article page