The Nonsubsampled Contourlet Transform Based Statistical Medical Image Fusion Using Generalized Gaussian Density

Table 2

Objective evaluation results of the five different metrics for MRI and PET images.

	Index	DWT	PCA	IHS	GP	CT	NSST	NSST-1	Proposed
Figure 7	MI	2.278	2.841	2.656	2.280	2.108	2.174	2.513	2.853
	EN	4.573	3.707	3.125	4.561	4.242	4.148	5.080	4.768
	SF	30.21	31.14	16.03	30.12	31.30	31.15	32.21	33.73
		0.525	0.498	0.483	0.526	0.551	0.584	0.617	0.607
	UID	0.752	0.737	0.725	0.753	0.789	0.797	0.836	0.814