| Ref. | Author and year | Biometrics traits | Database | Techniques | Level of fusion | Result (%) |
| [19] | Islam et al., 2013 | 3D ear and 3D face | FRGC 2.0Face and UND collection J | ICP | Feature level fusion | 96.8 | [24] | Islam et al., 2009 | 3D face and 3D ear | FRGC 2.0Face and UND collection J | ICP | Score level | 98.7 | [20] | Nazmeen, 2009 | Face and ear | Individual | Karhunen–Loeve (KL) expansion, PCA | Decision level | 96 | [25] | Kyong et al., 2005 | 2D + 3D face | NA | ARMS | Match score | 97.5 | [26] | Ajmera, 2014 | 3D face | EURECOM, CurtinFace, and one internal database | SURF with adaptive histogram equalization | Match score | 89.28, 98.07, and 81.00 | [27] | Hui and Bhanu, 2007 | 3D ear | UCR and UND | Local surface patch, global to local registration, and ICP | Rank level | 96.77 95.48 | [28] | Rahman et al., 2016 | Face | FRGC V2.0 and CK-AUC | 2D krawtch UK moment(2DKCMs), PCA, LDA, and 2D-PCA | NA | 98.70 | [29] | Pujitha et al., 2010 | Ear and face (2D + 3D) | Captured 2D images using Kinect | Eigenfaces | Feature fusion level | 97 | [9] | Ping and Bowyer, 2007 | 3D ear | UND | ICP | Feature level fusion | 97.6 | [30] | Wu et al., 2012 | 3D ear | UNDCollection J2 | ICP fine alignment | Score level | 97.59 | [31] | Algabary et al., 2014 | 3D ear | UND | Iterative closest point and stochastic lustering matching (SCM) | Decision level | 98.25 | [32] | Drira et al., 2013 | 3D face | Biosecure residential workshop | ICP | Match score | 97.25 |
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