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The discriminability of feature representation is the key to open-set face recognition. Previous methods rely on the learnable weights of the classification layer that represent the identities. However, the evaluation process learns no…

Computer Vision and Pattern Recognition · Computer Science 2023-04-25 Youzhe Song , Feng Wang

The success of most advanced facial expression recognition works relies heavily on large-scale annotated datasets. However, it poses great challenges in acquiring clean and consistent annotations for facial expression datasets. On the other…

Computer Vision and Pattern Recognition · Computer Science 2022-10-11 Yuxuan Shu , Xiao Gu , Guang-Zhong Yang , Benny Lo

Deep neural networks have reached remarkable achievements in medical image processing tasks, specifically in classifying and detecting various diseases. However, when confronted with limited data, these networks face a critical…

Computer Vision and Pattern Recognition · Computer Science 2024-09-25 Matina Mahdizadeh Sani , Ali Royat , Mahdieh Soleymani Baghshah

Cross-age facial images are typically challenging and expensive to collect, making noise-free age-oriented datasets relatively small compared to widely-used large-scale facial datasets. Additionally, in real scenarios, images of the same…

Computer Vision and Pattern Recognition · Computer Science 2024-01-04 Haoyi Wang , Victor Sanchez , Chang-Tsun Li

Most of previous deepfake detection researches bent their efforts to describe and discriminate artifacts in human perceptible ways, which leave a bias in the learned networks of ignoring some critical invariance features intra-class and…

Computer Vision and Pattern Recognition · Computer Science 2022-05-17 Ruiqi Zha , Zhichao Lian , Qianmu Li , Siqi Gu

Contrastive learning has moved the state of the art for many tasks in computer vision and information retrieval in recent years. This poster is the first work that applies supervised contrastive learning to the task of product matching in…

Machine Learning · Computer Science 2022-05-03 Ralph Peeters , Christian Bizer

Self-supervised instance discrimination is an effective contrastive pretext task to learn feature representations and address limited medical image annotations. The idea is to make features of transformed versions of the same images similar…

Computer Vision and Pattern Recognition · Computer Science 2022-11-17 Yejia Zhang , Xinrong Hu , Nishchal Sapkota , Yiyu Shi , Danny Z. Chen

Ensuring the reliability of face recognition systems against presentation attacks necessitates the deployment of face anti-spoofing techniques. Despite considerable advancements in this domain, the ability of even the most state-of-the-art…

Computer Vision and Pattern Recognition · Computer Science 2024-04-26 Jiawei Chen , Xiao Yang , Heng Yin , Mingzhi Ma , Bihui Chen , Jianteng Peng , Yandong Guo , Zhaoxia Yin , Hang Su

Self-supervised representation learning is a fundamental problem in computer vision with many useful applications (e.g., image search, instance level recognition, copy detection). In this paper we present a new contrastive self-supervised…

Computer Vision and Pattern Recognition · Computer Science 2021-11-16 David Wu , Yunnan Wu

Image classification is hindered by subtle inter-class differences and substantial intra-class variations, which limit the effectiveness of existing contrastive learning methods. Supervised contrastive approaches based on the InfoNCE loss…

Computer Vision and Pattern Recognition · Computer Science 2025-12-23 Bin Wang , Fadi Dornaika

For the Facial Action Unit (AU) detection task, accurately capturing the subtle facial differences between distinct AUs is essential for reliable detection. Additionally, AU detection faces challenges from class imbalance and the presence…

Computer Vision and Pattern Recognition · Computer Science 2025-12-01 Ziqiao Shang , Bin Liu , Fengmao Lv , Fei Teng , Tianrui Li , Lan-Zhe Guo

Contrastive learning applied to self-supervised representation learning has seen a resurgence in recent years, leading to state of the art performance in the unsupervised training of deep image models. Modern batch contrastive approaches…

Machine Learning · Computer Science 2021-03-12 Prannay Khosla , Piotr Teterwak , Chen Wang , Aaron Sarna , Yonglong Tian , Phillip Isola , Aaron Maschinot , Ce Liu , Dilip Krishnan

To overcome the data-hungry challenge, we have proposed a semi-supervised contrastive learning framework for the task of class-imbalanced semantic segmentation. First and foremost, to make the model operate in a semi-supervised manner, we…

Computer Vision and Pattern Recognition · Computer Science 2022-11-29 Kangcheng Liu

Learning discriminative image representations plays a vital role in long-tailed image classification because it can ease the classifier learning in imbalanced cases. Given the promising performance contrastive learning has shown recently in…

Computer Vision and Pattern Recognition · Computer Science 2021-03-29 Peng Wang , Kai Han , Xiu-Shen Wei , Lei Zhang , Lei Wang

Though having achieved some progresses, the hand-crafted texture features, e.g., LBP [23], LBP-TOP [11] are still unable to capture the most discriminative cues between genuine and fake faces. In this paper, instead of designing feature by…

Computer Vision and Pattern Recognition · Computer Science 2014-08-27 Jianwei Yang , Zhen Lei , Stan Z. Li

Face anti-spoofing (FAS) has lately attracted increasing attention due to its vital role in securing face recognition systems from presentation attacks (PAs). As more and more realistic PAs with novel types spring up, traditional FAS…

Computer Vision and Pattern Recognition · Computer Science 2022-09-05 Zitong Yu , Yunxiao Qin , Xiaobai Li , Chenxu Zhao , Zhen Lei , Guoying Zhao

Recently, seismic facies classification based on convolutional neural networks (CNN) has garnered significant research interest. However, existing CNN-based supervised learning approaches necessitate massive labeled data. Labeling is…

Computer Vision and Pattern Recognition · Computer Science 2023-03-14 Kewen Li , Wenlong Liu , Yimin Dou , Zhifeng Xu , Hongjie Duan , Ruilin Jing

Face anti-spoofing is crucial to security of face recognition systems. Previous approaches focus on developing discriminative models based on the features extracted from images, which may be still entangled between spoof patterns and real…

Computer Vision and Pattern Recognition · Computer Science 2020-08-20 Ke-Yue Zhang , Taiping Yao , Jian Zhang , Ying Tai , Shouhong Ding , Jilin Li , Feiyue Huang , Haichuan Song , Lizhuang Ma

Face anti-spoofing is crucial to the security of face recognition systems. Most previous methods formulate face anti-spoofing as a supervised learning problem to detect various predefined presentation attacks, which need large scale…

Computer Vision and Pattern Recognition · Computer Science 2021-09-08 Yunxiao Qin , Chenxu Zhao , Xiangyu Zhu , Zezheng Wang , Zitong Yu , Tianyu Fu , Feng Zhou , Jingping Shi , Zhen Lei

Learning visual representation of high quality is essential for image classification. Recently, a series of contrastive representation learning methods have achieved preeminent success. Particularly, SupCon outperformed the dominant methods…

Computer Vision and Pattern Recognition · Computer Science 2022-03-31 Sungho Park , Jewook Lee , Pilhyeon Lee , Sunhee Hwang , Dohyung Kim , Hyeran Byun
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