Infrared and Visible Image Fusion Based on Iterative Control of Anisotropic Diffusion and Regional Gradient Structure

Table 1

Quantitative index of image fusion results.

Source images	Index	ResNet	CNN	GTF	TIF	FPDE	Proposed
Car	EN	6.798	6.519	7.119	7.090	6.569	7.564
		0.313	0.349	0.246	0.398	0.299	0.401
		0.401	0.395	0.337	0.367	0.395	0.439
	MI	1.735	1.082	1.243	1.638	1.432	2.866
	SSIM	1.543	1.372	1.310	1.330	1.435	1.988
	PSNR	58.253	58.430	58.127	57.280	58.349	59.124
House	EN	6.592	6.618	6.952	6.960	6.870	6.998
		0.375	0.345	0.253	0.402	0.387	0.418
		0.463	0.471	0.338	0.468	0.477	0.490
	MI	1.301	1.251	1.080	1.417	1.222	1.456
	SSIM	1.534	1.436	1.374	1.418	1.305	1.991
	PSNR	58.143	59.462	59.066	58.225	58.356	59.184
Shop	EN	6.275	6.062	6.627	6.266	6.403	6.703
		0.461	0.205	0.481	0.589	0.328	0.598
		0.478	0.451	0.434	0.481	0.445	0.497
	MI	1.723	0.812	1.746	1.682	1.308	1.896
	SSIM	1.334	1.031	1.221	1.325	1.299	1.993
	PSNR	59.012	59.885	59.466	59.308	59.345	59.936
Snow	EN	7.012	6.818	5.919	6.911	6.918	7.723
		0.543	0.551	0.498	0.577	0.565	0.579
		0.554	0.483	0.478	0.517	0.612	0.661
	MI	2.045	1.914	1.598	2.368	1.999	2.657
	SSIM	1.367	1.238	1.164	1.222	1.029	1.989
	PSNR	55.034	56.630	56.122	55.237	56.856	57.083
Tree	EN	6.744	6.696	6.696	6.229	6.801	6.962
		0.301	0.311	0.348	0.341	0.333	0.379
		0.423	0.424	0.417	0.430	0.415	0.469
	MI	1.354	1.109	1.452	1.090	1.027	1.635
	SSIM	1.578	1.512	1.469	1.483	1.496	1.995
	PSNR	58.013	57.641	57.242	57.325	57.934	58.823
Walking Night	EN	6.348	5.734	6.059	6.281	6.786	7.011
		0.405	0.346	0.309	0.471	0.418	0.474
		0.313	0.353	0.291	0.344	0.350	0.386
	MI	2.019	2.130	2.189	2.139	2.005	2.335
	SSIM	1.346	1.153	1.232	1.208	1.206	1.989
	PSNR	55.999	56.047	55.843	54.825	55.470	56.943