Context-Aware AAL Services through a 3D Sensor-Based Platform

Table 1

Classification rates (%) of postures at varying viewpoint angles and distances, both with and without semiocclusions.

Feature		Level 1			Level 2			Level 3			Level 4
Distance		Low	Med	High	Low	Med	High	Low	Med	High	Low	Med	High
		Volumetric descriptor
View angle (°)	0	99	96	94	98	97	96	95	94	90	74	73	73	Without semi-occlusions
	45	99	97	95	97	96	94	93	93	89	73	71	72
	90	98	97	93	98	97	93	94	93	88	75	74	70
	135	97	95	96	97	94	95	92	92	91	77	75	72
	180	99	96	95	96	95	96	95	92	88	74	74	74
	0	94	95	92	94	92	93	91	88	87	67	66	67	With semi-occlusions
	45	94	93	93	94	94	92	93	87	86	66	64	64
	90	95	94	94	91	90	91	89	86	86	67	65	65
	135	93	90	92	93	94	92	84	85	85	65	67	67
	180	94	92	91	92	91	93	90	85	84	68	64	66
		Topological descriptor
View angle (°)	0	99	95	94	98	96	93	97	93	87	98	91	86	Without semi-occlusions
	45	98	95	93	97	94	91	96	92	86	99	85	87
	90	94	91	90	93	92	89	94	87	79	93	84	79
	135	98	97	95	96	93	92	97	90	86	95	87	83
	180	99	98	94	95	94	94	98	95	88	97	89	86
	0	94	89	81	93	86	82	92	87	77	91	87	80	With semi-occlusions
	45	91	85	84	90	85	79	94	84	75	92	83	79
	90	87	78	69	88	75	73	86	79	68	86	78	75
	135	92	86	75	87	83	75	89	76	71	88	81	78
	180	90	84	77	91	80	78	93	82	78	90	82	81