Table 1. The previous related reviews or surveys from 2018 to 2024.
| Elements covered in the study | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Reference | Style | Count | Timeline | Acquisition device | Methods | Evaluation metric | Datasets | Application | Challenge | Future direction |
| Xia et al. (2019) | Survey | N/A | N/A | ✓ | ✓ | – | – | – | – | ✓ |
| Zulpukharkyzy Zholshiyeva et al. (2021) | Survey | 70 | 2012–2021 | – | ✓ | – | – | ✓ | – | – |
| Kaur & Bansal (2022) | Survey | 19 | N/A | – | ✓ | ✓ | – | ✓ | ✓ | ✓ |
| Al-Shamayleh et al. (2018) | Review | 100 | N/A | ✓ | ✓ | – | – | ✓ | ✓ | ✓ |
| Yasen & Jusoh (2019) | Review | 111 | 2016–2018 | – | ✓ | – | – | ✓ | ✓ | – |
| Vuletic et al. (2019) | Review | 148 | 1980–2018 | ✓ | ✓ | – | – | ✓ | – | ✓ |
| Nogales & Benalcázar (2021) | Review | 40 | 2015–2019 | ✓ | ✓ | ✓ | ✓ | – | ✓ | – |
| Chakraborty et al. (2018) | Review | N/A | N/A | ✓ | ✓ | – | – | – | ✓ | – |
| Oudah, Al-Naji & Chahl (2020) | Review | N/A | N/A | – | ✓ | – | – | ✓ | ✓ | – |
| Mohamed, Mustafa & Jomhari (2021) | Review | 98 | 2014–2020 | ✓ | ✓ | ✓ | ✓ | – | – | ✓ |
| Sarma & Bhuyan (2021) | Review | N/A | N/A | – | ✓ | – | ✓ | – | ✓ | ✓ |
| Sha et al. (2020) | Review | N/A | N/A | – | ✓ | ✓ | ✓ | – | – | ✓ |
| Al Farid et al. (2022) | Review | 108 | 2012–2022 | – | ✓ | – | – | – | ✓ | ✓ |