Fig. 2.

Metrics $\mid \frac{\partial \overline{D}({\mathbf{f}}_n)}{\partial n}\mid ,\overline{\text{TV}}({\mathbf{f}}_n)$, and $\overline{\text{cPD}}({\mathbf{f}}_n)$ as functions of iteration number n. The values at n = 900 satisfy the practical convergence conditions in Eq. (14) conditions studied in the work. Therefore, the reconstructions at n = 900 is used as the surrogate solution to the convergent solution to the optimization program in Eq. (1).