Dataset and model,        pitch,  yaw,  roll,  mean,  median
biwi error:  7.092,   5.170, 4.657,  5.640,  2.607
bu error:    2.769,   4.105, 2.569,  3.147,  2.118
ict error:   3.489,   3.632, 3.538,  3.553,  2.029