UMA MAHESWARI, V; PRASAD, Vara; VISWANADHA RAJU, S. Local Directional Threshold based Binary Patterns for Facial Expression Recognition and Analysis. International Journal of Engineering and Technology, [S. l.], v. 7, n. 4.6, p. 17–22, 2018. DOI: 10.14419/ijet.v7i4.6.20225. Disponível em: https://sciencepubco.com/index.php/IJET/article/view/20225.. Acesso em: 12 apr. 2025.