Multialgorithm

Also, mixed strategies developed in Nazareth and Qi [1996], which interleave the sum-of-squares merit function and the Lagrangian-based potential function in order to enhance robustness without sacrificing efficiency, can be replaced by pure strategies (basic forms of the algorithms) that run, in parallel, within the framework of a multialgorithm.

To improve the robustness of biometric systems, multisamples (multiple sampes of the same biometric characteristic), multialgorithms (multiple algorithms with the same biometric sample), and multimodal (different biometric characteristics) biometric systems have been developed.