2024 |
Rot, Peter; Terhorst, Philipp; Peer, Peter; Štruc, Vitomir ASPECD: Adaptable Soft-Biometric Privacy-Enhancement Using Centroid Decoding for Face Verification Proceedings Article V: Proceedings of the IEEE International Conference on Automatic Face and Gesture Recognition (FG), str. 1-9, 2024. Povzetek | Povezava | BibTeX | Oznake: deepfake, deepfakes, face, face analysis, face deidentification, face image processing, face images, face synthesis, face verification, privacy, privacy enhancement, privacy protection, privacy-enhancing techniques, soft biometric privacy, soft biometrics @inproceedings{Rot_FG2024, State-of-the-art face recognition models commonly extract information-rich biometric templates from the input images that are then used for comparison purposes and identity inference. While these templates encode identity information in a highly discriminative manner, they typically also capture other potentially sensitive facial attributes, such as age, gender or ethnicity. To address this issue, Soft-Biometric Privacy-Enhancing Techniques (SB-PETs) were proposed in the literature that aim to suppress such attribute information, and, in turn, alleviate the privacy risks associated with the extracted biometric templates. While various SB-PETs were presented so far, existing approaches do not provide dedicated mechanisms to determine which soft-biometrics to exclude and which to retain. In this paper, we address this gap and introduce ASPECD, a modular framework designed to selectively suppress binary and categorical soft-biometrics based on users' privacy preferences. ASPECD consists of multiple sequentially connected components, each dedicated for privacy-enhancement of an individual soft-biometric attribute. The proposed framework suppresses attribute information using a Moment-based Disentanglement process coupled with a centroid decoding procedure, ensuring that the privacy-enhanced templates are directly comparable to the templates in the original embedding space, regardless of the soft-biometric modality being suppressed. To validate the performance of ASPECD, we conduct experiments on a large-scale face dataset and with five state-of-the-art face recognition models, demonstrating the effectiveness of the proposed approach in suppressing single and multiple soft-biometric attributes. Our approach achieves a competitive privacy-utility trade-off compared to the state-of-the-art methods in scenarios that involve enhancing privacy w.r.t. gender and ethnicity attributes. Source code will be made publicly available. |
Brodarič, Marko; Peer, Peter; Štruc, Vitomir Cross-Dataset Deepfake Detection: Evaluating the Generalization Capabilities of Modern DeepFake Detectors Proceedings Article V: Proceedings of the 27th Computer Vision Winter Workshop (CVWW), str. 1-10, 2024. Povzetek | Povezava | BibTeX | Oznake: data integrity, deepfake, deepfake detection, deepfakes, difussion, face, faceforensics++, media forensics @inproceedings{MarkoCVWW, Due to the recent advances in generative deep learning, numerous techniques have been proposed in the literature that allow for the creation of so-called deepfakes, i.e., forged facial images commonly used for malicious purposes. These developments have triggered a need for effective deepfake detectors, capable of identifying forged and manipulated imagery as robustly as possible. While a considerable number of detection techniques has been proposed over the years, generalization across a wide spectrum of deepfake-generation techniques still remains an open problem. In this paper, we study a representative set of deepfake generation methods and analyze their performance in a cross-dataset setting with the goal of better understanding the reasons behind the observed generalization performance. To this end, we conduct a comprehensive analysis on the FaceForensics++ dataset and adopt Gradient-weighted Class Activation Mappings (Grad-CAM) to provide insights into the behavior of the evaluated detectors. Since a new class of deepfake generation techniques based on diffusion models recently appeared in the literature, we introduce a new subset of the FaceForensics++ dataset with diffusion-based deepfake and include it in our analysis. The results of our experiments show that most detectors overfit to the specific image artifacts induced by a given deepfake-generation model and mostly focus on local image areas where such artifacts can be expected. Conversely, good generalization appears to be correlated with class activations that cover a broad spatial area and hence capture different image artifacts that appear in various part of the facial region. |
2023 |
Larue, Nicolas; Vu, Ngoc-Son; Štruc, Vitomir; Peer, Peter; Christophides, Vassilis SeeABLE: Soft Discrepancies and Bounded Contrastive Learning for Exposing Deepfakes Proceedings Article V: Proceedings of the International Conference on Computer Vision (ICCV), str. 21011 - 21021, IEEE 2023. Povzetek | Povezava | BibTeX | Oznake: CNN, deepfake detection, deepfakes, face, media forensics, one-class learning, representation learning @inproceedings{NicolasCCV, Modern deepfake detectors have achieved encouraging results, when training and test images are drawn from the same data collection. However, when these detectors are applied to images produced with unknown deepfake-generation techniques, considerable performance degradations are commonly observed. In this paper, we propose a novel deepfake detector, called SeeABLE, that formalizes the detection problem as a (one-class) out-of-distribution detection task and generalizes better to unseen deepfakes. Specifically, SeeABLE first generates local image perturbations (referred to as soft-discrepancies) and then pushes the perturbed faces towards predefined prototypes using a novel regression-based bounded contrastive loss. To strengthen the generalization performance of SeeABLE to unknown deepfake types, we generate a rich set of soft discrepancies and train the detector: (i) to localize, which part of the face was modified, and (ii) to identify the alteration type. To demonstrate the capabilities of SeeABLE, we perform rigorous experiments on several widely-used deepfake datasets and show that our model convincingly outperforms competing state-of-the-art detectors, while exhibiting highly encouraging generalization capabilities. The source code for SeeABLE is available from: https://github.com/anonymous-author-sub/seeable. |
Peng, Bo; Sun, Xianyun; Wang, Caiyong; Wang, Wei; Dong, Jing; Sun, Zhenan; Zhang, Rongyu; Cong, Heng; Fu, Lingzhi; Wang, Hao; Zhang, Yusheng; Zhang, HanYuan; Zhang, Xin; Liu, Boyuan; Ling, Hefei; Dragar, Luka; Batagelj, Borut; Peer, Peter; Struc, Vitomir; Zhou, Xinghui; Liu, Kunlin; Feng, Weitao; Zhang, Weiming; Wang, Haitao; Diao, Wenxiu DFGC-VRA: DeepFake Game Competition on Visual Realism Assessment Proceedings Article V: IEEE International Joint Conference on Biometrics (IJCB 2023), str. 1-9, Ljubljana, Slovenia, 2023. Povzetek | Povezava | BibTeX | Oznake: competition IJCB, deepfake detection, deepfakes, face, realism assessment @inproceedings{Deepfake_comp2023, This paper presents the summary report on the DeepFake Game Competition on Visual Realism Assessment (DFGCVRA). Deep-learning based face-swap videos, also known as deepfakes, are becoming more and more realistic and deceiving. The malicious usage of these face-swap videos has caused wide concerns. There is a ongoing deepfake game between its creators and detectors, with the human in the loop. The research community has been focusing on the automatic detection of these fake videos, but the assessment of their visual realism, as perceived by human eyes, is still an unexplored dimension. Visual realism assessment, or VRA, is essential for assessing the potential impact that may be brought by a specific face-swap video, and it is also useful as a quality metric to compare different face-swap methods. This is the third edition of DFGC competitions, which focuses on the new visual realism assessment topic, different from previous ones that compete creators versus detectors. With this competition, we conduct a comprehensive study of the SOTA performance on the new task. We also release our MindSpore codes to fur- *Jing Dong (jdong@nlpr.ia.ac.cn) is the corresponding author. ther facilitate research in this field (https://github. com/bomb2peng/DFGC-VRA-benckmark). |
2021 |
Ivanovska, Marija; Štruc, Vitomir A Comparative Study on Discriminative and One--Class Learning Models for Deepfake Detection Proceedings Article V: Proceedings of ERK 2021, str. 1–4, 2021. Povzetek | Povezava | BibTeX | Oznake: biometrics, comparative study, computer vision, deepfake detection, deepfakes, detection, face, one-class learning @inproceedings{ERK_Marija_2021, Deepfakes or manipulated face images, where a donor's face is swapped with the face of a target person, have gained enormous popularity among the general public recently. With the advancements in artificial intelligence and generative modeling such images can nowadays be easily generated and used to spread misinformation and harm individuals, businesses or society. As the tools for generating deepfakes are rapidly improving, it is critical for deepfake detection models to be able to recognize advanced, sophisticated data manipulations, including those that have not been seen during training. In this paper, we explore the use of one--class learning models as an alternative to discriminative methods for the detection of deepfakes. We conduct a comparative study with three popular deepfake datasets and investigate the performance of selected (discriminative and one-class) detection models in matched- and cross-dataset experiments. Our results show that disciminative models significantly outperform one-class models when training and testing data come from the same dataset, but degrade considerably when the characteristics of the testing data deviate from the training setting. In such cases, one-class models tend to generalize much better. |
Objave
2024 |
ASPECD: Adaptable Soft-Biometric Privacy-Enhancement Using Centroid Decoding for Face Verification Proceedings Article V: Proceedings of the IEEE International Conference on Automatic Face and Gesture Recognition (FG), str. 1-9, 2024. |
Cross-Dataset Deepfake Detection: Evaluating the Generalization Capabilities of Modern DeepFake Detectors Proceedings Article V: Proceedings of the 27th Computer Vision Winter Workshop (CVWW), str. 1-10, 2024. |
2023 |
SeeABLE: Soft Discrepancies and Bounded Contrastive Learning for Exposing Deepfakes Proceedings Article V: Proceedings of the International Conference on Computer Vision (ICCV), str. 21011 - 21021, IEEE 2023. |
DFGC-VRA: DeepFake Game Competition on Visual Realism Assessment Proceedings Article V: IEEE International Joint Conference on Biometrics (IJCB 2023), str. 1-9, Ljubljana, Slovenia, 2023. |
2021 |
A Comparative Study on Discriminative and One--Class Learning Models for Deepfake Detection Proceedings Article V: Proceedings of ERK 2021, str. 1–4, 2021. |