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. Author manuscript; available in PMC: 2014 Mar 19.
Published in final edited form as: Proc IEEE Int Symp Biomed Imaging. 2012:1060–1063. doi: 10.1109/ISBI.2012.6235741

Fig. 2.

Fig. 2

(a): Cost in (3) v/s iteration, (b): SER (dB) v/s iteration, (c): Direct IFFT reconstruction for reference. A spatial frame of the reconstructions (d): without continuation, fixed β = 1010, (e): with low β = 105 and (f): with continuation, start with β = 105 and increment till β = 1010. The cost with continuation decreases monotonically avoiding any possible local minima as seen while fixing β to a large value in (d). Specifically (d) gets stuck in modeling the basis functions corresponding to error artifacts; (compare d and c). Also shown is the iterate during low β in (e), which is an equivalent nuclear norm solution. As β is increased during continuation, the algorithm converges to the BCS solution in (f).