Dataset and model,        pitch,  yaw,  roll,  mean,  median
biwi error:  7.990,   5.614, 4.448,  6.017,  2.624
bu error:    2.762,   4.103, 2.568,  3.145,  2.118
ict error:   3.619,   3.606, 3.625,  3.617,  2.027