BioID A multimodal biometric identification system

BioID A multimodal biometric identification system

Abstract:

Most systems that control access to financial transactions, computer networks, or secured locations identify authorized persons by recognizing passwords or personal identification numbers. The weakness of these systems is that unauthorized persons can discover others’ passwords and numbers quite easily and use them without detection.

Biometric identification systems, which use physical features to check a person’s identity, ensure much greater security than password and number systems. Biometric features such as the face or a fingerprint can be stored on a microchip in a credit card, for example, If someone steals the card and tries to use it, the impostor’s biometric features will not match the features stored in the card, and the system will prevent the transaction. A single feature, however, sometimes fails to be exact enough for identification. Consider identical twins, for example. Their faces alone may not distinguish them. Another disadvantage of using only one feature is that the chosen feature is not always readable. For example, some five percent of people have fingerprints that cannot be recorded because they are obscured by a cut or a scar or are too fine to show up well in a photograph.
This paper presents a system called BioID which is developed to identify a person using three different features-Face, voice, and lip movement. With its three modalities, BioID achieves much greater accuracy than single feature systems.

INTRODUCTION:

Biometric (Biological features as a measure) recognition refers to the use of distinctive physiological and behavioral characteristics (e.g., fingerprints, face, hang geometry, iris, gait, signature), called biometric identifiers or simply biometrics, for automatically recognizing a person.

In multimodal biometric identification systems even if one modality is somehow disturbed, for example, if a noisy environment drowns out the voice—the other two modalities still lead to an accurate identification. BioID is the first identification system that uses a dynamic feature, lip movement. This feature makes BioID more secure against fraud than systems using only static features such as fingerprints.


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