Longsheng, Fu, et al. “Kiwifruit Recognition at Nighttime Using Artificial Lighting Based on Machine Vision”. International Journal of Agricultural and Biological Engineering, vol. 8, no. 4, Aug. 2015, pp. 52-59, https://www.ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/1576.