Fig. 2From: An Lp (0 ≤ p ≤ 1)-norm regularized image reconstruction scheme for breast DOT with non-negative-constraintSelection of the optimal regularization parameter: a the generalized L-curve and the red rough range of the optimal λ; b comparison of the normalized metrics including RMSE, AR, CNR and TE. The optimal regularization parameter is λ = 5e − 16, as highlighted by the dotted vertical line Back to article page