An Alternating Direction Method for Mixed Gaussian Plus Impulse Noise Removal

Table 4

The PSNR (dB) and computing time (seconds) for the restoration results by MNID-ADMM, Cai-TP, and HADMM method for blurred images contaminated by random-valued noise plus Gaussian noise (𝜎=5). The blurring kernel is the out-of-focus kernel of radius 3.

Type	Image	Level	MNID-ADMM		Cai-TP		HADMM
			PSNR	Time	PSNR	Time	PSNR	Time
Gaussian + random valued	Einstein		27.2	8.3	25.5	144.6	26.9	4.3
	Cameraman	55%	24.9	8.6	23.2	196.1	24.9	3.7
	Boat		25.5	8.3	24.4	142.1	25.4	3.5
Gaussian + random valued	Einstein		26.5	9.0	24.2	178.8	26.2	5.2
	Cameraman	70%	24.5	9.1	20.1	213.9	24.4	4.5
	Boat		25.1	8.6	22.7	161.7	25.0	4.1