Federated Learning for Grading Oil Palm Fruit Ripeness in the Oil Palm Industry. - Patchanee Laddawong; Yutthapong Pianroj; Piyanart Chotikawanid; Teerasak Punvichai; Saysunee Jumrat; Atitaya Kham-Ouam; Jirapond Muangprathub (Appl. Comput. Intell. Soft Comput., 2025)