Multi-PIE.
Gross R, Matthews I, Cohn J, Kanade T, Baker S.
Gross R, et al.
Proc Int Conf Autom Face Gesture Recognit. 2010 May 1;28(5):807-813. doi: 10.1016/j.imavis.2009.08.002.
Proc Int Conf Autom Face Gesture Recognit. 2010.
PMID: 20490373
Free PMC article.