Kunrui, Xu, Lu Xi, Wang Qiaohua, and Ma Meihu. 2015. “Online Automatic Grading of Salted Eggs Based on Machine Vision”. International Journal of Agricultural and Biological Engineering 8 (1):35-41. https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/1104.