Dual-modality Talking-metrics: 3D Visual-Audio Integrated Behaviometric Cues from Speakers

Face-based behaviometrics focus on dynamic biological signatures generated from face behaviors, which are informative and subject-specific for identity recognition. Most existing face behaviometrics rely on 2D visual features and thus are sensitive to pose or intensity variations. This paper presents a dual-modality behaviometrics algorithm (talking-metrics) that integrates 3D video and audio cues from a human face speaking a passphrase. Static and dynamic 3D face features are extracted algorithmically and audio features are transformed through a few learning models. We concatenate the top 18 discriminative 3D visual-audio features to represent the bi-modality and utilize an linear discrimant analysis (LDA) classifier for identity recognition. The experiments were conducted on a new publicly released dataset (S3DFM). Both qualitative feature distributions and quantitative comparison results show the feasibility of the proposed pipeline and the superiority over using each modality independently. A 98.5% cross-validation recognition rate over 60 subjects and 10 trials was achieved. An anti-spoofing test also demonstrates the robustness of the proposed method.