U3. Multimodal Biometric Systems

U3. Multimodal Biometric Systems

1. Several biometric technologies integrated into 1 system

   • Increases verification accuracy, reduce FMR
     • Increased Security by only granting access if user is accepted by all technologies in use
     • Higher accuracy rates for verification & identification
   • Allow a larger population to use it
     • For those users that cannot use a specific tech, an alternative is then available
   • By combining different technologies you can overcome a single technology weakness

2. Different modes

   • Single Sensor - Same Features
     • + : Minimal increase in cost, improvement in data capture, reduction in FMR, FRR
     • - : No resistance to sensor failure or injury to biometric feature of user
     • concatenates data from multiple reads of the same feature to reduce scanning / read errors & improve data sent for feature extraction
   • Same Sensor - Multiple Features
     • - : No resistance to sensor failure, longer data capture time slows down ID&A
     • + : Minimal increase in cost, improvement in data capture, reduction in FMR, FRR
     • scans more than 1 feature, ie fingerprint reader scans more than 1 finger, improves quantity of data
   • Multiple Sensors - Same Features
     • - : Increased HW complexity, Increased challenges of integration & calibration
     • + : increase in cost of sensors, improvement in data capture, resistance to single sensor failure, larger resistance to FMR, FRR
     • Scans the same feature from different sensors. need to locate 2 sensors can cause calibration issues
   • Multiple Sensors - Multiple features
     • + : increase in cost of sensors, improvement in data capture, resistance to single sensor failure, larger resistance to FMR, FRR. Wider range of population can be included
     • - : Increased complexity, Increased challenges of integration & calibration, longer data capture time slows down ID&A
     • different sensors scanning different features, used in very high security areas