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Facial Action Unit (AU) detection has gained significant attention as it enables the breakdown of complex facial expressions into individual muscle movements. In this paper, we revisit two fundamental factors in AU detection: diverse and…

Computer Vision and Pattern Recognition · Computer Science 2025-05-12 Mang Ning , Albert Ali Salah , Itir Onal Ertugrul

Dynamic Facial Expression Recognition(DFER) is a rapidly evolving field of research that focuses on the recognition of time-series facial expressions. While previous research on DFER has concentrated on feature learning from a deep learning…

Computer Vision and Pattern Recognition · Computer Science 2025-07-11 Feng Liu , Lingna Gu , Chen Shi , Xiaolan Fu

This study reveals a cutting-edge re-balanced contrastive learning strategy aimed at strengthening face anti-spoofing capabilities within facial recognition systems, with a focus on countering the challenges posed by printed photos, and…

Computer Vision and Pattern Recognition · Computer Science 2024-05-30 Chuanbiao Song , Yan Hong , Jun Lan , Huijia Zhu , Weiqiang Wang , Jianfu Zhang

This paper describes an approach to the facial action unit (AU) detection. In this work, we present our submission to the Field Affective Behavior Analysis (ABAW) 2021 competition. The proposed method uses the pre-trained JAA model as the…

Computer Vision and Pattern Recognition · Computer Science 2021-07-12 Chenggong Zhang , Juan Song , Qingyang Zhang , Weilong Dong , Ruomeng Ding , Zhilei Liu

Action Unit (AU) detection becomes essential for facial analysis. Many proposed approaches face challenging problems in dealing with the alignments of different face regions, in the effective fusion of temporal information, and in training…

Computer Vision and Pattern Recognition · Computer Science 2017-04-12 Wei Li , Farnaz Abitahi , Zhigang Zhu

Contrastive Analysis (CA) detects anomalies by contrasting patterns unique to a target group (e.g., unhealthy subjects) from those in a background group (e.g., healthy subjects). In the context of brain MRIs, existing CA approaches rely on…

Computer Vision and Pattern Recognition · Computer Science 2025-07-02 Cristiano Patrício , Carlo Alberto Barbano , Attilio Fiandrotti , Riccardo Renzulli , Marco Grangetto , Luis F. Teixeira , João C. Neves

Contrastive learning is a representation learning method performed by contrasting a sample to other similar samples so that they are brought closely together, forming clusters in the feature space. The learning process is typically…

Machine Learning · Computer Science 2022-09-28 Valentino Vito , Lim Yohanes Stefanus

Unsupervised aspect detection (UAD) aims at automatically extracting interpretable aspects and identifying aspect-specific segments (such as sentences) from online reviews. However, recent deep learning-based topic models, specifically…

Computation and Language · Computer Science 2021-01-01 Tian Shi , Liuqing Li , Ping Wang , Chandan K. Reddy

The detection of AI-generated faces is commonly approached as a binary classification task. Nevertheless, the resulting detectors frequently struggle to adapt to novel AI face generators, which evolve rapidly. In this paper, we describe an…

Computer Vision and Pattern Recognition · Computer Science 2025-01-07 Mian Zou , Baosheng Yu , Yibing Zhan , Kede Ma

Face deepfake detection has seen impressive results recently. Nearly all existing deep learning techniques for face deepfake detection are fully supervised and require labels during training. In this paper, we design a novel deepfake…

Computer Vision and Pattern Recognition · Computer Science 2021-04-26 Sheldon Fung , Xuequan Lu , Chao Zhang , Chang-Tsun Li

Facial Action Units (AUs) represent a set of facial muscular activities and various combinations of AUs can represent a wide range of emotions. AU recognition is often used in many applications, including marketing, healthcare, education,…

Computer Vision and Pattern Recognition · Computer Science 2021-07-09 Junya Saito , Xiaoyu Mi , Akiyoshi Uchida , Sachihiro Youoku , Takahisa Yamamoto , Kentaro Murase , Osafumi Nakayama

Visual attention has been extensively studied for learning fine-grained features in both facial expression recognition (FER) and Action Unit (AU) detection. A broad range of previous research has explored how to use attention modules to…

Computer Vision and Pattern Recognition · Computer Science 2022-03-24 Xiaotian Li , Zhihua Li , Huiyuan Yang , Geran Zhao , Lijun Yin

Unsupervised anomaly detection (UAD) learns one-class classifiers exclusively with normal (i.e., healthy) images to detect any abnormal (i.e., unhealthy) samples that do not conform to the expected normal patterns. UAD has two main…

Computer Vision and Pattern Recognition · Computer Science 2021-07-01 Yu Tian , Guansong Pang , Fengbei Liu , Yuanhong chen , Seon Ho Shin , Johan W. Verjans , Rajvinder Singh , Gustavo Carneiro

Deep active learning has emerged as a powerful tool for training deep learning models within a predefined labeling budget. These models have achieved performances comparable to those trained in an offline setting. However, deep active…

Machine Learning · Computer Science 2023-09-21 Moseli Mots'oehli , Kyungim Baek

Contrastive learning has shown outstanding performances in both supervised and unsupervised learning, and has recently been introduced to solve weakly supervised learning problems such as semi-supervised learning and noisy label learning.…

Machine Learning · Computer Science 2023-06-08 Jingyi Cui , Weiran Huang , Yifei Wang , Yisen Wang

Collecting large-scale datasets is crucial for training deep models, annotating the data, however, inevitably yields noisy labels, which poses challenges to deep learning algorithms. Previous efforts tend to mitigate this problem via…

Computer Vision and Pattern Recognition · Computer Science 2023-02-16 Yuanpeng Tu , Boshen Zhang , Yuxi Li , Liang Liu , Jian Li , Jiangning Zhang , Yabiao Wang , Chengjie Wang , Cai Rong Zhao

Facial Action Units (AUs) detection is a cornerstone of objective facial expression analysis and a critical focus in affective computing. Despite its importance, AU detection faces significant challenges, such as the high cost of AU…

Computer Vision and Pattern Recognition · Computer Science 2025-04-01 Bohao Xing , Kaishen Yuan , Zitong Yu , Xin Liu , Heikki Kälviäinen

This paper addresses the challenges of complex dependencies and diverse anomaly patterns in cloud service environments by proposing a dependency modeling and anomaly detection method that integrates contrastive learning. The method…

Machine Learning · Computer Science 2025-10-16 Yue Xing , Yingnan Deng , Heyao Liu , Ming Wang , Yun Zi , Xiaoxuan Sun

With the advent of big data across multiple high-impact applications, we are often facing the challenge of complex heterogeneity. The newly collected data usually consist of multiple modalities and are characterized with multiple labels,…

Machine Learning · Computer Science 2022-07-27 Lecheng Zheng , Jinjun Xiong , Yada Zhu , Jingrui He

Recently,the detection transformer has gained substantial attention for its inherent minimal post-processing requirement.However,this paradigm relies on abundant training data,yet in the context of the cross-domain adaptation,insufficient…

Computer Vision and Pattern Recognition · Computer Science 2024-01-25 Ziru Zeng , Yue Ding , Hongtao Lu