Morphing attacks keep threatening biometric systems, especially face recognition systems. Over time they have become simpler to perform and more realistic, as such, the usage of deep learning systems to detect these attacks has grown. At the same time, there is a constant concern regarding the lack of interpretability of deep learning models. Balancing performance and interpretability has been a difficult task for scientists. However, by leveraging domain information and proving some constraints, we have been able to develop IDistill, an interpretable method with state-of-the-art performance that provides information on both the identity separation on morph samples and their contribution to the final prediction. The domain information is learnt by an autoencoder and distilled to a classifier system in order to teach it to separate identity information. When compared to other methods in the literature it outperforms them in three out of five databases and is competitive in the remaining.

本研究开发了IDistill方法，利用自编码器学习域信息，并将其精炼为分类器，以便教会它分离身份信息。在三个数据库中它超越了其他方法，并在另外两个数据库中表现出竞争力，有望用于预防生物测量系统攻击中的模拟攻击。

揭示双重真相：分离面部变形身份以进行面部变形检测