Research Article
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 |
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