For many applications, there are additional sources of non-biometric information that can be used for
person authentication, while in others the use of a single biometric is not sufficiently secure or does not provide adequate coverage
of the user population. This can be indicated by such parameter as Failure to
Enroll rate. Thus, multi biometric system emerged as a way to provide more secure and reliable person authentication
system under those conditions.
It must be pointed out that in literature there is a slight
difference between two terms. The term multimodal biometric system refers specifically to those biometric systems where more than one biometric modalities are used The term multibiometric is more generic and includes
multimodal systems and some other configurations using only one biometric modality with different samples
instances or algorithms.
Information fusion can be defined as “an
information process that associates, correlates and combines data and
information from single or multiple sensors or sources to achieve refined
estimates of parameters, characteristics, events and behaviors”. A good
information fusion method allows the impact of less reliable sources be lowered
compared to reliable ones. A number of disparate research areas including
robotics, image processing, pattern recognition, information retrieval etc.
utilize and describe information fusion in their context. Thus, information
fusion established itself as an independent research area over the last decade
for its impact on a vast number of disparate resear....data
and feature fusion
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