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Face recognition can benefit from the utilization of depth data captured using low-cost cameras, in particular for presentation attack detection purposes. Depth video output from these capture devices can however contain defects such as…

Computer Vision and Pattern Recognition · Computer Science 2021-07-28 Torsten Schlett , Christian Rathgeb , Christoph Busch

In this paper, we present a large scale unlabeled person re-identification (Re-ID) dataset "LUPerson" and make the first attempt of performing unsupervised pre-training for improving the generalization ability of the learned person Re-ID…

Computer Vision and Pattern Recognition · Computer Science 2021-04-27 Dengpan Fu , Dongdong Chen , Jianmin Bao , Hao Yang , Lu Yuan , Lei Zhang , Houqiang Li , Dong Chen

Human gesture recognition with Radio Frequency (RF) signals has attained acclaim due to the omnipresence, privacy protection, and broad coverage nature of RF signals. These gesture recognition systems rely on neural networks trained with a…

Computer Vision and Pattern Recognition · Computer Science 2024-11-19 Bin-Bin Zhang , Dongheng Zhang , Yadong Li , Yang Hu , Yan Chen

Synthetic data is emerging as a substitute for authentic data to solve ethical and legal challenges in handling authentic face data. The current models can create real-looking face images of people who do not exist. However, it is a known…

Computer Vision and Pattern Recognition · Computer Science 2023-11-08 Marco Huber , Anh Thi Luu , Fadi Boutros , Arjan Kuijper , Naser Damer

We propose a novel end-to-end semi-supervised adversarial framework to generate photorealistic face images of new identities with wide ranges of expressions, poses, and illuminations conditioned by a 3D morphable model. Previous adversarial…

Computer Vision and Pattern Recognition · Computer Science 2020-09-09 Baris Gecer , Binod Bhattarai , Josef Kittler , Tae-Kyun Kim

Recent advances in supervised deep learning methods are enabling remote measurements of photoplethysmography-based physiological signals using facial videos. The performance of these supervised methods, however, are dependent on the…

Computer Vision and Pattern Recognition · Computer Science 2021-12-15 Hao Wang , Euijoon Ahn , Jinman Kim

Self-supervised learning (SSL) has emerged as a powerful paradigm for learning representations without labeled data. Most SSL approaches rely on strong, well-established, handcrafted data augmentations to generate diverse views for…

Machine Learning · Computer Science 2026-01-16 Berken Utku Demirel , Christian Holz

Face anti-spoofing (FAS) techniques aim to enhance the security of facial identity authentication by distinguishing authentic live faces from deceptive attempts. While two-class FAS methods risk overfitting to training attacks to achieve…

Computer Vision and Pattern Recognition · Computer Science 2025-07-25 Pei-Kai Huang , Jun-Xiong Chong , Ming-Tsung Hsu , Fang-Yu Hsu , Yi-Ting Lin , Kai-Heng Chien , Hao-Chiang Shao , Chiou-Ting Hsu

Semi-supervised learning lately has shown much promise in improving deep learning models when labeled data is scarce. Common among recent approaches is the use of consistency training on a large amount of unlabeled data to constrain model…

Machine Learning · Computer Science 2020-11-06 Qizhe Xie , Zihang Dai , Eduard Hovy , Minh-Thang Luong , Quoc V. Le

Synthetic face datasets are increasingly used to overcome the limitations of real-world biometric data, including privacy concerns, demographic imbalance, and high collection costs. However, many existing methods lack fine-grained control…

Computer Vision and Pattern Recognition · Computer Science 2025-07-17 Raul Ismayilov , Dzemila Sero , Luuk Spreeuwers

Recent advances in semi-supervised learning have shown tremendous potential in overcoming a major barrier to the success of modern machine learning algorithms: access to vast amounts of human-labeled training data. Previous algorithms based…

Machine Learning · Computer Science 2019-11-22 Phi Vu Tran

Data augmentation is rapidly gaining attention in machine learning. Synthetic data can be generated by simple transformations or through the data distribution. In the latter case, the main challenge is to estimate the label associated to…

Machine Learning · Computer Science 2019-03-26 Maria Perez-Ortiz , Peter Tino , Rafal Mantiuk , Cesar Hervas-Martinez

Face deidentification is an active topic amongst privacy and security researchers. Early deidentification methods relying on image blurring or pixelization were replaced in recent years with techniques based on formal anonymity models that…

Computer Vision and Pattern Recognition · Computer Science 2017-08-01 Blaž Meden , Refik Can Mallı , Sebastjan Fabijan , Hazım Kemal Ekenel , Vitomir Štruc , Peter Peer

Unsupervised person re-identification (Re-ID) attracts increasing attention due to its potential to resolve the scalability problem of supervised Re-ID models. Most existing unsupervised methods adopt an iterative clustering mechanism,…

Computer Vision and Pattern Recognition · Computer Science 2021-12-09 Lianjie Jia , Chenyang Yu , Xiehao Ye , Tianyu Yan , Yinjie Lei , Pingping Zhang

Lensless cameras, innovatively replacing traditional lenses for ultra-thin, flat optics, encode light directly onto sensors, producing images that are not immediately recognizable. This compact, lightweight, and cost-effective imaging…

Computer Vision and Pattern Recognition · Computer Science 2024-06-07 Xin Cai , Hailong Zhang , Chenchen Wang , Wentao Liu , Jinwei Gu , Tianfan Xue

Deep learning-based face recognition continues to face challenges due to its reliance on huge datasets obtained from web crawling, which can be costly to gather and raise significant real-world privacy concerns. To address this issue, we…

Computer Vision and Pattern Recognition · Computer Science 2025-03-14 Minsoo Kim , Min-Cheol Sagong , Gi Pyo Nam , Junghyun Cho , Ig-Jae Kim

Self-supervised learning (SSL) has emerged as a promising paradigm that presents supervisory signals to real-world problems, bypassing the extensive cost of manual labeling. Consequently, self-supervised anomaly detection (SSAD) has seen a…

Machine Learning · Computer Science 2025-07-22 Jaemin Yoo , Lingxiao Zhao , Leman Akoglu

Current research on soft-biometrics showed that privacy-sensitive information can be deduced from biometric templates of an individual. Since for many applications, these templates are expected to be used for recognition purposes only, this…

Computer Vision and Pattern Recognition · Computer Science 2020-02-24 Philipp Terhörst , Marco Huber , Naser Damer , Florian Kirchbuchner , Arjan Kuijper

It is well known that the performance of any classification model is effective if the dataset used for the training process and the test process satisfy some specific requirements. In other words, the more the dataset size is large,…

Computer Vision and Pattern Recognition · Computer Science 2022-11-09 Hazem Zein , Samer Chantaf , Régis Fournier , Amine Nait-Ali