An outdoor biometric system: evaluation of normalization fusion schemes for face and voice
Himanshu Vajaria, Tanmoy Islam, Pranab Mohanty, Sudeep Sarkar, Ravi T. Sankar, Rangachar Kasturi · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2006
The use of biometric systems in physical access scenarios is gaining popularity. In such scenarios, users are enroled under well controlled conditions and the enrolment is usually indoors. To gain access to the building, the user provides his biometric samples in an outdoor environment over which there is little control. This adversely affects the quality of the samples and as a result the system performance is sub-optimal. This study evaluates the performance of a multimodal biometric system in a physical access scenario. We evaluate leading commercial algorithms on an indoor-outdoor, multimodal database comprising of face and voice samples. The indoor-outdoor nature of the database and the choice of modalities results in individual systems performing poorly. Popular normalization and fusion techniques are used to improve the performance of the overall system. Multimodal fusion results in an average improvement of approximately 20% at 1% false acceptance rate over individual modalities.