470165.fig.004a
(a)
470165.fig.004b
(b)
470165.fig.004c
(c)
470165.fig.004d
(d)
470165.fig.004e
(e)
470165.fig.004f
(f)
Figure 4: Reconstructed results of “Brain” image from noisy and undersampled Fourier data (noise level: 40 dB, sampling ratio: 20%). (a) Actual image; (b) TVAL3; (c) RecPF; (d) hybrid TVL1; (e) second-order TV; (f) our method.