Fig. 1. Segmentation result based on two-dimensional Tsallis gray entropy

Fig. 2. Schematic of accurate target extraction. (a) Threshold segmentation result of significant map; (b) final extracted target region

Fig. 3. Flow chart of the proposed fusion method

Fig. 4. Three groups of visible images and infrared images. (a) Visible image of group 1; (b) infrared image of group 1; (c) visible image of group 2; (d) infrared image of group 2; (e) visible image of group 3; (f) infrared image of group 3

Fig. 5. Targets extracted from two infrared images by the proposed method and the method in Ref. [13]. (a) Targets extracted from the Fig. 4(b) by the proposed method; (b) targets extracted from the Fig. 4(d) by the proposed method; (c) targets extracted from the Fig. 4(f) by the proposed method; (d) targets extracted from the Fig. 4(b) by the method in Ref. [13]; (e) targets extracted from the Fig. 4(d) by the method in Ref. [13] ; (f) targets extracted from the Fig. 4(f) by the method in Ref. [13]

Fig. 6. Fusion results on the images of group 1. (a) LP method; (b) WT method; (c) SWT method;(d) NSCT method; (e) method in Ref. [13]; (f) proposed method

Fig. 7. Fusion results on the images of group 2. (a) LP method; (b) WT method; (c) SWT method;(d) NSCT method; (e) method in Ref. [13]; (f) proposed method

Fig. 8. Fusion results on the images of group 3. (a) LP method; (b) WT method; (c) SWT method; (d) NSCT method; (e) method in Ref. [13]; (f) proposed method

Table 1. Quantitative evaluation results of six image fusion methods