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An overview of multi-modal biometrics based on face and ear

Unimodal biometric systems contend with a variety of problems such as noisy data, restricted degrees of freedom, non-universality and spoof attacks. Some of these limitations can be overcome by employing multi-modal biometric identification technologies. The paper discusses a new multi-modal biometrics based on face and ear. The research significance of multi-modal biometrics based on face and ear will be represented first, then we introduce some researchers' achievements and inadequacies. We also propose further exploration and research in this area.