Fig. 1. Relationship between image information entropy and exposure time in low dynamic range scene

Fig. 2. Comparison before and after guided filtering

Fig. 3. The process of proposed method

Fig. 4. Laplace pyramid reconstruction

Fig. 5. Partial fusion results of proposed algorithm

Fig. 6. Fusion results of source image sequence Cave by different algorithms. (a) Multi-exposure image sequence Cave; (b) algorithm 1; (c) algorithm 2; (d) algorithm 3; (e) algorithm 4; (f) algorithm 5; (g) algorithm 6; (h) algorithm 7; (i) proposed algorithm

Fig. 7. Fusion results of source image sequence Lamp by different algorithms. (a) Multi-exposure image sequence Lamp(b) algorithm 1; (c) algorithm 2;(d) algorithm 3; (e) algorithm 4; (f) algorithm 5; (g) algorithm 6; (h) algorithm 7; (i) proposed algorithm

Fig. 8. Fusion results of source image sequence Mountain Garden by different algorithms. (a) Multi-exposure image sequence Mountain garden; (b) algorithm 1;(c) algorithm 2; (d) algorithm 3; (e) algorithm 4; (f) algorithm 5; (g) algorithm 6; (h) algorithm 7; (i) proposed algorithm

Fig. 9. Fusion and ablation experimental results of multi-exposure image sequence Venice. (a) Multi-exposure image sequence Venice; (b) fusion result of proposed algorithm; (c) fusion result without guided filtering; (d) fusion result without structural weight; (e) fusion result without saturation weight; (f) fusion result without exposure weight

Fig. 10. Relationship between MEF-SSIM and Gaussian standard deviation

Table 1. Comparison of objective indicator average values of different algorithms on three datasets

Table 2. Comparison of indicators for different element combinations in three datasets