Fig. 10.

(a)–(c) Smartphone camera and (d)–(f) USB camera results of 1951 USAF resolution test chart imaging along with measured MTFs from a slanted-edge test. The smartphone camera’s measured MTF matches the USAF cutoff frequency of group 5 to 6 ($57\mathrm{lp}/\mathrm{mm}$). The USB camera’s measured MTF matches the USAF cutoff frequency of group 3 to 6 ($14.25\mathrm{lp}/\mathrm{mm}$).