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The increase in twin births has created a requirement for biometric systems to accurately determine the identity of a person who has an identical twin. The discriminability of some of the identical twin biometric traits, such as fingerprints, iris, and palmprints, is supported by anatomy and the formation process of the biometric characteristic, which state they are different even in identical twins due to a number of random factors during the gestation period. For the first time, the authors collected multiple biometric traits (fingerprint, face, and iris) of 66 families of twins, and they performed unimodal and multimodal matching experiments to assess the ability of biometric systems in distinguishing identical twins.
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