Classification of elderly pain severity from automated video clip facial action unit analysis: A study from a Thai data repository. - Patama Gomutbutra; Adisak Kittisares; Atigorn Sanguansri; Noppon Choosri; Passakorn Sawaddiruk; Puriwat Fakfum; Peerasak Lerttrakarnnon; Sompob Saralamba (Frontiers Artif. Intell., 2022)