Magnetic Resonance Image Denoising Algorithm Based on Cartoon, Texture, and Residual Parts

Table 4

PSNR values of denoising the cartoon, texture, and residual parts in order (W: Wiener filter, H: hard threshold, and S: soft threshold).

Noise variance	0.01	0.03	0.05	0.07	0.09
PSNR of MRI 1
SHW	29.34	25.5	23.52	21.42	20.99
SWH	28.7	24.07	22	20.06	19.67
HSW	24.7	23.02	19.49	19.65	17.66
HWS	24.34	22.24	20.91	19.83	19.13
WSH	29.77	25.32	20.25	20.34	18.03
WHS (proposed)	29.48	25.73	23.6	22.13	20.95
Max	29.77	25.73	23.6	22.13	20.99
PSNR of MRI 2
SHW	29.24	23.99	23.63	22.14	21.16
SWH	28.19	22.72	21.94	20.62	19.75
HSW	24.98	23.32	15.52	20.54	13.89
HWS	24.47	22.34	21.03	20.04	19.32
WSH	29.81	25.56	15.78	21.27	14.01
WHS (proposed)	29.79	25.92	23.78	22.24	21.13
Max	29.81	25.92	23.78	22.24	21.16
PSNR of MRI 3
SHW	29.51	25.66	23.26	21.46	20.81
SWH	28.73	24	21.86	20.08	19.6
HSW	22.48	22.95	20.65	19.69	18.57
HWS	24.7	22.41	20.95	19.88	19.18
WSH	24.49	24.91	21.54	20.3	18.95
WHS (proposed)	29.85	25.9	23.7	22.11	20.89
Max	29.85	25.9	23.7	22.11	20.89