Global Quasi-Minimal Residual Method for Image Restoration

Table 1

Numerical results for the experiments, in terms of PSNR (dB) and CPU time (second).

Test problem	Method	restored PSNR	CPU time	observed PSNR
starcluster	global QMR	41.16	0.25 s	30.82
MRI	global QMR	20.61	0.156 s	17.95
	global Tik-QMR	22.16	0.344 s
Indian man	global Tik-QMR	25.69	8.078 s	23.51
	CGLS	25.05	1.7 s
bridge	global Tik-QMR	19.91	49.42 s	15.66
	global GMRES	20.05	67.95 s