Dataset and model,        pitch,  yaw,  roll,  mean,  median
biwi error:  7.779,   6.302, 4.440,  6.174,  2.779
bu error:    2.739,   3.348, 2.458,  2.848,  1.975
ict error:   3.501,   3.988, 3.298,  3.596,  1.968