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LieToMe: An Ensemble Approach for Deception Detection from Facial Cues

Danilo Avola

Department of Computer Science, Sapienza University, Via Salaria 113, 00198 Rome, Italy

E-mail Address: [email protected]

Corresponding author.

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Marco Cascio

Department of Computer Science, Sapienza University, Via Salaria 113, 00198 Rome, Italy

E-mail Address: [email protected]

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Luigi Cinque

Department of Computer Science, Sapienza University, Via Salaria 113, 00198 Rome, Italy

E-mail Address: [email protected]

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Alessio Fagioli

Department of Computer Science, Sapienza University, Via Salaria 113, 00198 Rome, Italy

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, and

Gian Luca Foresti

Department of Computer Science, Mathematics and Physics, University of Udine, Via delle Scienze, 33100 Udine, Italy

E-mail Address: [email protected]

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https://doi.org/10.1142/S0129065720500689Cited by:22 (Source: Crossref)

Abstract

Deception detection is a relevant ability in high stakes situations such as police interrogatories or court trials, where the outcome is highly influenced by the interviewed person behavior. With the use of specific devices, e.g. polygraph or magnetic resonance, the subject is aware of being monitored and can change his behavior, thus compromising the interrogation result. For this reason, video analysis-based methods for automatic deception detection are receiving ever increasing interest. In this paper, a deception detection approach based on RGB videos, leveraging both facial features and stacked generalization ensemble, is proposed. First, a face, which is well-known to present several meaningful cues for deception detection, is identified, aligned, and masked to build video signatures. These signatures are constructed starting from five different descriptors, which allow the system to capture both static and dynamic facial characteristics. Then, video signatures are given as input to four base-level algorithms, which are subsequently fused applying the stacked generalization technique, resulting in a more robust meta-level classifier used to predict deception. By exploiting relevant cues via specific features, the proposed system achieves improved performances on a public dataset of famous court trials, with respect to other state-of-the-art methods based on facial features, highlighting the effectiveness of the proposed method.

Keywords:

References

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