Two New Efficient Iterative Regularization Methods for Image Restoration Problems

Table 1

Image deblurring using LSQR and IDR(𝑠) for “Lena” (𝜎=1).

Method		LSQR	IDR(1)	IDR(2)	IDR(4)	IDR(8)
𝛿=10^−2	Iter	8	4	6	5	9
	MV	16	4	6	5	9
	REN	0.0625	0.0705	0.1352	0.0799	0.1832
𝛿=10^−3	Iter	32	10	10	9	13
	MV	64	10	10	9	13
	REN	0.0347	0.0323	0.0314	0.0313	0.0319
𝛿=10^−4	Iter	145	32	33	30	35
	MV	290	32	33	30	35
	REN	0.0170	0.0135	0.0175	0.0140	0.0177