Table 2.

Mean absolute error of head pose estimation for different testers.

Tester ID	Pitch				Mean MAE
	[−15°, +15°]		[−25°, +25°]		[−15°, +15°]	[−25°, +25°]
	MAE	Frames	MAE	Frames
#1	2.543°	188	2.562°	197	2.091°	2.2064°
#2	3.302°	163	3.953°	189
#3	0.995°	109	1.062°	153
#4	1.256°	138	1.379°	180
#5	1.957°	217	1.700°	282
#6	1.791°	63	2.973°	87
Tester ID	Yaw				Mean MAE
	[−15°, +15°]		[−35°, +35°]		[−15°, +15°]	[−35°, +35°]
	MAE	Frames	MAE	Frames
#1	1.769°	173	2.300°	276	2.3559°	2.7898°
#2	2.962°	77	3.890°	145
#3	2.037°	67	3.390°	124
#4	2.866°	71	3.284°	194
#5	2.519°	154	2.089°	308
#6	2.710°	42	3.049°	82
Tester ID	Roll				Mean MAE
	[−15°, +15°]		[−35°, +35°]		[−15°, +15°]	[−35°, +35°]
	MAE	Frames	MAE	Frames
#1	1.997°	132	1.957°	186	2.0344°	2.2981°
#2	2.888°	51	3.459°	94
#3	2.084°	107	2.404°	157
#4	2.878°	87	2.903°	168
#5	1.302°	212	1.3024°	212
#6	2.541°	75	2.708°	115