A New Smoothed L0 Regularization Approach for Sparse Signal Recovery

Table 4

SSIM analysis of recovered Boat image by BPDN, SL0, L2-SL0, -RLS, and RRSL0 with noise intensity changes according to sequence .

Noise intensity ()	SSIM of Boat image recovery
	BPDN	SL0	L2-SL0	-RLS	RRSL0
0	0.9865	0.9901	0.9902	0.9914	0.9934
0.01	0.9764	0.9852	0.9865	0.9887	0.9898
0.05	0.9418	0.9714	0.9756	0.9789	0.9827
0.1	0.8827	0.9083	0.9403	0.9631	0.9669
0.2	0.7452	0.8077	0.8868	0.9284	0.9396
0.5	0.3571	0.4427	0.5966	0.6492	0.7351