Exploration of the Choquet integral for the fusion of biometric modalities

In multimodal biometrics, modalities can be robust against the authentication of certain people and weak for others. The conventional fusion techniques such as the Product, Mean, AND, OR and the Majority Voting do not take into account this kind of behaviour. In this paper, we propose a new approach to fusion procedures in the context of a biometric authentication. The proposed method is based on the use of the Choquet integral that takes into account the interactions between the terms and people through fuzzy measures. The fuzzy measures, the ones we have proposed, are based on the number of confusion, the entropy and the uncertainty function. The results have been validated on a biometric database, the modalities are: the face, the off-line handwriting and the off-line signature. The achieved results demonstrate the robustness of our approach and its adaptability.