[6] [6] LIN K, CHEN J, SI H, et al. Measurement of leaf area index using reference object and computer vision［J］. Oxidation Communications, 2016, 39(2A): 1832-1844.

[11] [11] EASLON H M, BLOOM A J. Easy leaf area: automated digital image analysis for rapid and accurate measurement of leaf area［J］. Applications in Plant Sciences, 2014, 2(7): 1400033.

[12] [12] DOGAN A, UYAK C, KESKIN N, et al. Grapevine leaf area measurements by using pixel values［J］. Proceeding of the Bulgarian Academy of Sciences, 2018, 71(6): 772-779.

[14] [14] ITAKURA K, HOSOI F. Automatic leaf segmentation for estimating leaf area and leaf inclination angle in 3D Plant images［J］. Sensors, 2018, 18(10): 3576.

[15] [15] SANZ-CORTIELLA R, LLORENS-CALVERAS J, ESCOLA A, et al. Innovative LIDAR 3D dynamic measurement system to estimate fruit–tree leaf area［J］. Sensors, 2011, 11(6): 5769-5791.

[19] [19] CRISTOFORI V, FALLOVO C, GYVES E M D, et al. Non-destructive, analogue model for leaf area estimation in persimmon (Diospyros kaki L. f.) based on leaf length and width measurement［J］. European Journal of Horticultural Science, 2008, 73(5): 216-221.

[33] [33] BRéDA N J J. Ground-based measurements of leaf area index: a review of methods, instruments and current controversies［J］. Journal of Experimental Botany, 2003, 54(392): 2403-2417.