Frontal views of all subjects are videotaped under

constant illumination using fixed light sources, and none

of the subjects wear eyeglasses. These constraints are

imposed to minimize optical flow degradation. Previously

untrained subjects are video recorded performing a series

of expressions, and the image sequences are coded by

certified FACS coders. Facial expressions are analyzed in

digitized image sequences of arbitrary length (expression

sequences neutral to peak vary 9 to 44 frames).

60 subjects, both male and female, the larger

database were used in this study. The study includes more

than 260 image sequences and 5000 images. Subjects

ranged in age (18-35) and ethnicity (Caucasian, African-

American, and Asian/Indian).-Frontal views of all subjects are videotaped under

constant illumination using fixed light sources, and none

of the subjects wear eyeglasses. These constraints are

imposed to minimize optical flow degradation. Previously

untrained subjects are video recorded performing a series

of expressions, and the image sequences are coded by

certified FACS coders. Facial expressions are analyzed in

digitized image sequences of arbitrary length (expression

sequences　neutral to peak vary　9 to 44 frames).

60 subjects, both male and female,　the larger

database were used in this study. The study includes more

than 260 image sequences and 5000 images. Subjects

ranged in age (18-35) and ethnicity (Caucasian, African-

American, and Asian/Indian).