Table 2.
Comparative table of the selected papers for analysis.
| Type | References | Intake Detection | Type of Food Detection | User Identification | Cost | Supervision | Infrastructure Needs | Portability |
|---|---|---|---|---|---|---|---|---|
| Smartphone | [46] | — | ✓ | — | ✓ | — | — | ✓ |
| [47] | ✓ | ✓ | X | — | — | X | ✓ | |
| [48] | ✓ | ✓ | — | — | X | X | ✓ | |
| [49] | ✓ | — | ✓ | — | ✓ | — | ✓ | |
| Image-based techniques | [50] | X | ✓ | X | ✓ | X | X | X |
| [51] | ✓ | ✓ | X | X | X | X | X | |
| [52] | ✓ | ✓ | — | — | ✓ | X | ✓ | |
| [53] | X | ✓ | — | ✓ | ✓ | X | ✓ | |
| [54] | X | ✓ | X | ✓ | ✓ | ✓ | — | |
| [55] | X | ✓ | X | — | ✓ | X | ✓ | |
| Wearable | [57] | ✓ | — | — | — | ✓ | ✓ | ✓ |
| [63] | X | — | — | X | X | X | X | |
| [64] | X | — | — | X | X | X | X | |
| [65] | ✓ | X | ✓ | — | ✓ | X | ✓ | |
| [66] | ✓ | X | ✓ | X | ✓ | ✓ | ✓ | |
| [67] | ✓ | X | — | — | ✓ | ✓ | ✓ | |
| [68] | ✓ | X | — | ✓ | ✓ | ✓ | ✓ | |
| Smart Home | [69] | ✓ | ✓ | — | X | — | — | — |
| [71] | X | ✓ | X | X | X | X | X | |
| [72] | X | ✓ | X | — | — | X | ||
| IoT | [73] | X | ✓ | X | X | ✓ | ✓ | ✓ |
| [75] | ✓ | ✓ | X | — | ✓ | ✓ | ✓ | |
| [76] | X | ✓ | X | — | ✓ | ✓ | ✓ | |
| [77] | — | — | ✓ | X | X | X | ✓ | |
| Single Board Computers | [79] | X | — | X | X | X | X | X |
| [80] | X | ✓ | ✓ | — | X | X | X | |
| Others | [81] | X | ✓ | X | — | ✓ | X | X |
| [82] | X | — | — | — | — | X | X | |
| [83] | X | ✓ | — | — | X | X | ✓ |