Figure 6.

Images of the 9.5 and the 4.8 mm steel rod at 5 mm separation using reduced aperture data, corresponding to expected loss of resolution. Reconstructions by SAFT using (a) full aperture, (c) 6.25% reduced aperture, and (e) 3.5% reduced aperture. Reconstructions by the SDUI method using (b) full aperture with ${\lambda }_1=200$, ${\lambda }_2=30$, (d) 6.25% reduced aperture with ${\lambda }_1=3$, ${\lambda }_2=0.005$, and (f) 3.5% reduced aperture with ${\lambda }_1=3$, ${\lambda }_2=0.001$. All dimensions are in millimeters.