23 research outputs found
Semi-Adversarial Networks: Convolutional Autoencoders for Imparting Privacy to Face Images
In this paper, we design and evaluate a convolutional autoencoder that
perturbs an input face image to impart privacy to a subject. Specifically, the
proposed autoencoder transforms an input face image such that the transformed
image can be successfully used for face recognition but not for gender
classification. In order to train this autoencoder, we propose a novel training
scheme, referred to as semi-adversarial training in this work. The training is
facilitated by attaching a semi-adversarial module consisting of a pseudo
gender classifier and a pseudo face matcher to the autoencoder. The objective
function utilized for training this network has three terms: one to ensure that
the perturbed image is a realistic face image; another to ensure that the
gender attributes of the face are confounded; and a third to ensure that
biometric recognition performance due to the perturbed image is not impacted.
Extensive experiments confirm the efficacy of the proposed architecture in
extending gender privacy to face images
VGAN-Based Image Representation Learning for Privacy-Preserving Facial Expression Recognition
Reliable facial expression recognition plays a critical role in human-machine
interactions. However, most of the facial expression analysis methodologies
proposed to date pay little or no attention to the protection of a user's
privacy. In this paper, we propose a Privacy-Preserving Representation-Learning
Variational Generative Adversarial Network (PPRL-VGAN) to learn an image
representation that is explicitly disentangled from the identity information.
At the same time, this representation is discriminative from the standpoint of
facial expression recognition and generative as it allows expression-equivalent
face image synthesis. We evaluate the proposed model on two public datasets
under various threat scenarios. Quantitative and qualitative results
demonstrate that our approach strikes a balance between the preservation of
privacy and data utility. We further demonstrate that our model can be
effectively applied to other tasks such as expression morphing and image
completion
DeepPrivacy: A Generative Adversarial Network for Face Anonymization
We propose a novel architecture which is able to automatically anonymize
faces in images while retaining the original data distribution. We ensure total
anonymization of all faces in an image by generating images exclusively on
privacy-safe information. Our model is based on a conditional generative
adversarial network, generating images considering the original pose and image
background. The conditional information enables us to generate highly realistic
faces with a seamless transition between the generated face and the existing
background. Furthermore, we introduce a diverse dataset of human faces,
including unconventional poses, occluded faces, and a vast variability in
backgrounds. Finally, we present experimental results reflecting the capability
of our model to anonymize images while preserving the data distribution, making
the data suitable for further training of deep learning models. As far as we
know, no other solution has been proposed that guarantees the anonymization of
faces while generating realistic images.Comment: Accepted to ISVC 201