Azimuthally averaged profiles, showing the performance of the pixon (dotted curves) and ML (long-dashed curves) algorithms for reconstructing high (upper panel) and low SNR beta profiles. Error bars on the reconstructed results represent the standard deviation of 10 Monte Carlo realizations of the same truth. For clarity, the error bars for the ML results have been displaced 0.02 to the right. The full width half maximum of the beam is ∼10 pixels. Full and short-dashed curves represent the true β profiles and the data, respectively.