Dataset and model,        pitch,  yaw,  roll,  mean,  median
biwi error:  7.092,   5.170, 4.657,  5.640,  2.607
bu error:    2.762,   3.328, 2.249,  2.780,  1.963
ict error:   3.529,   3.873, 2.688,  3.363,  1.931