A Critical Study of Biometrics and Their Fusion

Many different disciplines, including identification, forensics, authorization, and security system, have successfully employed biometric technology in real-life. A multimodal biometric system was developed due to various drawbacks of the earlier unimodal biometric systems, which only utilized one trait. More than one biometric trait can be combined at the feature level, and decision level called biometric fusion or multimodel biometric to overcome the limitations of a single biometric to achieve better performance in terms of security and acceptance by the public. Several biometric modalities are briefly described in this paper, like fingerprint, gait etc.. The two easiest used safety mechanisms traits are fingerprint and gait recognition reviews in this paper. Comparing several biometric methods shows that iris, gait, and fingerprint recognition systems have reduced error rates. Additionally, the combination of these methods yields biometric fusion, the most accurate method of identification and verification.