Image Denoising Algorithm Combined with SGK Dictionary Learning and Principal Component Analysis Noise Estimation

Table 3

Denoising results of two algorithms for 12 images.

Image	Guessed noise value	PSNR of SGK	PCA estimated value	PSNR of PCA + SGK
Barbara	12.15	31.5826	3.25	40.8875
Boat	20.02	31.0877	4.96	36.9938
Bridge	29.78	24.7522	8.67	32.1713
Cameraman	35.11	27.5935	10.22	33.7171
Couple	30.45	26.1943	12.30	32.2721
Fingerprint	20.10	28.0063	15.06	29.7811
Flintstones	4.98	23.4492	19.10	29.0998
Hill	5.23	22.5119	20.21	29.9451
House	10.00	22.8280	22.58	32.4558
Lena	15.15	23.7830	24.34	30.8314
Man	15.50	21.8376	28.04	28.3323
Peppers	18.24	22.4973	30.38	28.7696