Dataset and model,        pitch,  yaw,  roll,  mean,  median
biwi error:  6.870,   5.338, 4.482,  5.563,  2.632
bu error:    2.785,   4.117, 2.571,  3.158,  2.119
ict error:   3.481,   3.641, 3.581,  3.568,  2.036