Optical Coherence Tomography Noise Reduction Using Anisotropic Local Bivariate Gaussian Mixture Prior in 3D Complex Wavelet Domain

Table 2

PSNR (in dB) values of test images for different nonstationary noise levels.

Noise parameters; 𝜎𝑔(𝑖)=𝑘0𝑠(𝑖)+𝑘1	Lena				Boat				Barbara
	Noisy Image	Soft thresh. [54]	Proposed method in [55]	Our method	Noisy image	Soft thresh. [54]	Proposed method in [55]	Our method	Noisy image	Soft thresh. [54]	Proposed method in [55]	Our method
𝑘0=0.05, 𝑘1=4	27.72	34.13	34.61	35.60	27.51	32.44	32.59	33.26	27.94	31.99	32.20	33.56
𝑘0=0.1,𝑘1=4	23.48	31.62	32.49	33.31	23.22	29.95	30.23	30.75	23.69	29.05	25.81	30.91
𝑘0=0.2,𝑘1=4	18.49	27.50	29.65	30.52	18.20	26.77	27.60	28.13	18.71	25.81	25.94	27.91