A Novel Directionlet-Based Image Denoising Method Using MMSE Estimator and Laplacian Mixture Distribution

Table 1

The cumulative distribution distance values of Gaussian, Gaussian mixture, and Laplacian mixture PDFs, respectively, and the corresponding parameters estimated from two level subbands along two directions of Couple image.

Orientation (coset)	Model	Image subbands
		HHH	HHL	LHH	HLH	LHL	HLL	LLH
Level I
0°	Gauss	0.2370	0.2365	0.2556	0.2730	0.2365	0.2253	0.2650
	GM	0.0214	0.0474	0.0267	0.0372	0.0327	0.0288	0.0342
	LM	0.0218	0.0281	0.0283	0.0211	0.0130	0.0313	0.0209
Level II
45° (coset 2)	Gauss	0.2215	0.2130	0.2575	0.2454	0.2130	0.2266	0.2651
	GM	0.0208	0.0232	0.0351	0.0389	0.0232	0.0312	0.0387
	LM	0.0155	0.0188	0.0157	0.0219	0.0187	0.0126	0.0217