Medical Image Fusion Algorithm Based on Nonlinear Approximation of Contourlet Transform and Regional Features

Table 3

Indexes of performance evaluation.

	Standard deviation	Correlation coefficients	Entropy	Mutual information	Running time
Wavelet fusion	50.48	0.64	6.78	4.16	1.608
Haar fusion	58.60	0.66	7.59	4.47	1.901
Contourlet fusion	59.32	0.72	7.63	4.52	3.021
Nonsubsampled contourlet fusion	65.01	0.73	7.72	4.59	5.561
Nonlinear contourlet fusion	63.16	0.72	7.70	4.55	1.254