[1] Liu Y, Wang L, Cheng J et al. Multi-focus image fusion: a survey of the state of the art[J]. Information Fusion, 64, 71-91(2020).

[2] Jia R Q, Yin G F, Zhao N J et al. Multi-focus image fusion method for microscopic algal images[J]. Acta Optica Sinica, 43, 1210001(2023).

[3] Toet A. Image fusion by a ratio of low-pass pyramid[J]. Pattern Recognition Letters, 9, 245-253(1989).

[4] De I, Chanda B. A simple and efficient algorithm for multifocus image fusion using morphological wavelets[J]. Signal Processing, 86, 924-936(2006).

[5] Zhang Q, Guo B L. Multifocus image fusion using the nonsubsampled contourlet transform[J]. Signal Processing, 89, 1334-1346(2009).

[6] Yang B, Li S T. Multifocus image fusion and restoration with sparse representation[J]. IEEE Transactions on Instrumentation and Measurement, 59, 884-892(2010).

[7] Petrovic V S, Xydeas C S. Gradient-based multiresolution image fusion[J]. IEEE Transactions on Image Processing, 13, 228-237(2004).

[8] Amin-Naji M, Aghagolzadeh A. Multifocus image fusion in DCT domain using variance and energy of Laplacian and correlation coefficient for visual sensor networks[J]. Journal of Artificial Intelligence and Data Mining, 6, 233-250(2018).

[9] Amin-Naji M, Ranjbar-Noiey P, Aghagolzadeh A. Multi-focus image fusion using Singular Value Decomposition in DCT domain[C], 45-51(2018).

[10] Zhou Z Q, Li S, Wang B. Multi-scale weighted gradient-based fusion for multi-focus images[J]. Information Fusion, 20, 60-72(2014).

[11] Ma J L, Zhou Z Q, Wang B et al. Multi-focus image fusion based on multi-scale focus measures and generalized random walk[C], 5464-5468(2017).

[12] Bai X Z, Zhang Y, Zhou F G et al. Quadtree-based multi-focus image fusion using a weighted focus-measure[J]. Information Fusion, 22, 105-118(2015).

[13] Xu H, Fan F, Zhang H et al. A deep model for multi-focus image fusion based on gradients and connected regions[J]. IEEE Access, 8, 26316-26327(2020).

[14] Huang J, Le Z L, Ma Y et al. A generative adversarial network with adaptive constraints for multi-focus image fusion[J]. Neural Computing and Applications, 32, 15119-15129(2020).

[15] He K M, Sun J, Tang X O. Guided image filtering[J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 35, 1397-1409(2013).

[16] He K M, Sun J. Fast guided filter[EB/OL]. https://arxiv.org/abs/1505.00996

[17] Yin X, Ma B Y, Ban X J et al. Defocus spread effect elimination method in multiple multi-focus image fusion for microscopic images[J]. Chinese Journal of Engineering, 43, 1174-1181(2021).

[18] Tian S, Ren Y F, Shao X Y et al. Multi-focus image fusion with filter operator and double scale decomposition[J]. Laser & Optoelectronics Progress, 58, 0610010(2021).

[19] Lang S, Zhang Y W, Zheng H Q et al. Large field of view and high resolution HiLo optical slice microscopic imaging system[J]. Chinese Optics, 15, 1302-1312(2022).

[20] Aslantas V, Kurban R. Fusion of multi-focus images using differential evolution algorithm[J]. Expert Systems With Applications, 37, 8861-8870(2010).

[21] Wang Z, Bovik A C, Sheikh H R et al. Image quality assessment: from error visibility to structural similarity[J]. IEEE Transactions on Image Processing, 13, 600-612(2004).

[22] Hossny M, Nahavandi S, Creighton D. Comments on ‘Information measure for performance of image fusion’[J]. Electronics Letters, 44, 1066-1067(2008).

[23] Xydeas C S, Petrović V. Objective image fusion performance measure[J]. Electronics Letters, 36, 308-309(2000).