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

Table 4

Index of performance evaluation.

	Standard deviation	Correlation coefficients	Entropy	Mutual information	Running time
Wavelet fusion	80.14	0.75	2.24	2.15	2.013
Haar fusion	80.27	0.77	3.54	2.22	2.408
Contourlet fusion	81.30	0.80	4.39	2.27	4.211
Nonsubsampled contourlet fusion	81.48	0.84	5.23	3.32	9.054
Nonlinear contourlet fusion	81.39	0.81	5.14	2.91	1.701