Dataset and model,        pitch,  yaw,  roll,  mean,  median
biwi error:  7.778,   6.302, 4.441,  6.174,  2.777
bu error:    2.739,   3.349, 2.459,  2.849,  1.974
ict error:   3.498,   3.986, 3.298,  3.594,  1.966