Novel Registration and Fusion Algorithm for Multimodal Railway Images with Different Field of Views

Table 2

Quantitative evaluation of source image and fusion results at daytime.

evaluation indicators	Source image		Fusion results
	IR	Registered; visible	gray weighted average	Contourlet; Transform	Wavelet transform	Total variation	proposed
average gray	88.37	17.28	67.09	67.37	67.07	76.66	91.60
standard deviation	47.73	43.20	37.07	40.13	37.85	46.46	51.63
average gradient	2.60	2.55	2.41	4.90	3.37	2.64	4.89
Information entropy	6.70	1.87	6.46	6.87	6.61	6.95	7.07
edge intensity	27.74	22.15	24.21	47.04	30.33	27.18	46.98