Training fingerprint recognition models using synthetic data has recently gained increased attention in the biometric community as it alleviates the dependency on sensitive personal data. Existing approaches for fingerprint generation are limited in their ability to generate diverse impressions of the same finger, a key property for providing effective data for training recognition models. To address this gap, we present FPGAN-Control, an identity preserving image generation framework which enables control over the fingerprint's image appearance (e.g., fingerprint type, acquisition device, pressure level) of generated fingerprints. We introduce a novel appearance loss that encourages disentanglement between the fingerprint's identity and appearance properties. In our experiments, we used the publicly available NIST SD302 (N2N) dataset for training the FPGAN-Control model. We demonstrate the merits of FPGAN-Control, both quantitatively and qualitatively, in terms of identity preservation level, degree of appearance control, and low synthetic-to-real domain gap. Finally, training recognition models using only synthetic datasets generated by FPGAN-Control lead to recognition accuracies that are on par or even surpass models trained using real data. To the best of our knowledge, this is the first work to demonstrate this.

使用合成数据训练指纹识别模型最近在生物特征学界引起了广泛关注，因为它减少了对敏感个人数据的依赖。我们提出了一种身份保留图像生成框架FPGAN-Control，它能够控制生成指纹的图像外观，包括指纹类型、采集设备和压力水平等方面。我们实验证明了FPGAN-Control在身份保留水平、外观控制程度以及合成到真实数据领域差距方面的优点。据我们所知，这是首次证明只使用FPGAN-Control生成的合成数据进行训练可以达到甚至超过使用真实数据训练的模型的识别准确性。

FPGAN-Control:用于训练合成数据的可控指纹生成器