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Contrastive representation learning is a modern paradigm for learning representations of unlabeled data via augmentations -- precisely, contrastive models learn to embed semantically similar pairs of samples (positive pairs) closer than…

机器学习 · 统计学 2026-01-01 Anna Van Elst , Debarghya Ghoshdastidar

Face verification is a problem approached in the literature mainly using nonlinear class-specific subspace learning techniques. While it has been shown that kernel-based Class-Specific Discriminant Analysis is able to provide excellent…

计算机视觉与模式识别 · 计算机科学 2018-07-06 Guanqun Cao , Alexandros Iosifidis , Moncef Gabbouj

Despite the recent success of convolutional neural networks for computer vision applications, unconstrained face recognition remains a challenge. In this work, we make two contributions to the field. Firstly, we consider the problem of face…

计算机视觉与模式识别 · 计算机科学 2018-06-12 Daniel Sáez Trigueros , Li Meng , Margaret Hartnett

With the growing popularity of RAG, the capabilities of embedding models are gaining increasing attention. Embedding models are primarily trained through contrastive loss learning, with negative examples being a key component. Previous work…

计算与语言 · 计算机科学 2024-08-30 Shiyu Li , Yang Tang , Shizhe Chen , Xi Chen

Demographic bias is a significant challenge in practical face recognition systems. Existing methods heavily rely on accurate demographic annotations. However, such annotations are usually unavailable in real scenarios. Moreover, these…

计算机视觉与模式识别 · 计算机科学 2021-06-11 Xingkun Xu , Yuge Huang , Pengcheng Shen , Shaoxin Li , Jilin Li , Feiyue Huang , Yong Li , Zhen Cui

Racial equality is an important theme of international human rights law, but it has been largely obscured when the overall face recognition accuracy is pursued blindly. More facts indicate racial bias indeed degrades the fairness of…

计算机视觉与模式识别 · 计算机科学 2021-04-07 Mei Wang , Weihong Deng

Despite the remarkable progress of deep neural networks (DNNs) in various visual tasks, their vulnerability to adversarial examples raises significant security concerns. Recent adversarial training methods leverage inverse adversarial…

计算机视觉与模式识别 · 计算机科学 2025-07-10 Kejia Zhang , Juanjuan Weng , Shaozi Li , Zhiming Luo

In face recognition, designing margin-based (e.g., angular, additive, additive angular margins) softmax loss functions plays an important role in learning discriminative features. However, these hand-crafted heuristic methods are…

计算机视觉与模式识别 · 计算机科学 2020-07-14 Xiaobo Wang , Shuo Wang , Cheng Chi , Shifeng Zhang , Tao Mei

In the case of an imbalance between positive and negative samples, hard negative mining strategies have been shown to help models learn more subtle differences between positive and negative samples, thus improving recognition performance.…

计算机视觉与模式识别 · 计算机科学 2023-03-13 Jiahan Zhang , Dayong Tian

Hard negative mining has shown effective in enhancing self-supervised contrastive learning (CL) on diverse data types, including graph CL (GCL). The existing hardness-aware CL methods typically treat negative instances that are most similar…

机器学习 · 计算机科学 2024-01-09 Chaoxi Niu , Guansong Pang , Ling Chen

Privacy issue is a main concern in developing face recognition techniques. Although synthetic face images can partially mitigate potential legal risks while maintaining effective face recognition (FR) performance, FR models trained by face…

计算机视觉与模式识别 · 计算机科学 2024-11-01 Zhonglin Sun , Siyang Song , Ioannis Patras , Georgios Tzimiropoulos

Fairness in deep learning models trained with high-dimensional inputs and subjective labels remains a complex and understudied area. Facial emotion recognition, a domain where datasets are often racially imbalanced, can lead to models that…

计算机视觉与模式识别 · 计算机科学 2023-08-10 Alex Fan , Xingshuo Xiao , Peter Washington

Although face recognition systems have achieved impressive performance in recent years, the low-resolution face recognition (LRFR) task remains challenging, especially when the LR faces are captured under non-ideal conditions, as is common…

计算机视觉与模式识别 · 计算机科学 2019-04-01 Pei Li , Loreto Prieto , Domingo Mery , Patrick Flynn

Performance in face and speaker verification is largely driven by margin-based softmax losses such as CosFace and ArcFace. Recently introduced $\alpha$-divergence loss functions offer a compelling alternative, particularly due to their…

计算机视觉与模式识别 · 计算机科学 2025-11-25 Dimitrios Koutsianos , Ladislav Mosner , Yannis Panagakis , Themos Stafylakis

Convolutional neural networks (CNNs) have become the most successful approach in many vision-related domains. However, they are limited to domains where data is abundant. Recent works have looked at multi-task learning (MTL) to mitigate…

计算机视觉与模式识别 · 计算机科学 2018-03-16 Ludovic Trottier , Philippe Giguère , Brahim Chaib-draa

Recognizing wild faces is extremely hard as they appear with all kinds of variations. Traditional methods either train with specifically annotated variation data from target domains, or by introducing unlabeled target variation data to…

计算机视觉与模式识别 · 计算机科学 2020-02-28 Yichun Shi , Xiang Yu , Kihyuk Sohn , Manmohan Chandraker , Anil K. Jain

Deep neural networks have exhibited impressive performance in image classification tasks but remain vulnerable to adversarial examples. Standard adversarial training enhances robustness but typically fails to explicitly address inter-class…

计算机视觉与模式识别 · 计算机科学 2026-04-10 Himanshu Singh , A. V. Subramanyam , Shivank Rajput , Mohan Kankanhalli

Deep convolutional neural networks (CNNs) have greatly improved the Face Recognition (FR) performance in recent years. Almost all CNNs in FR are trained on the carefully labeled datasets containing plenty of identities. However, such…

计算机视觉与模式识别 · 计算机科学 2018-03-28 Wei Hu , Yangyu Huang , Fan Zhang , Ruirui Li , Wei Li , Guodong Yuan

Deep convolutional neural networks often perform poorly when faced with datasets that suffer from quantity imbalances and classification difficulties. Despite advances in the field, existing two-stage approaches still exhibit dataset bias…

机器学习 · 计算机科学 2023-03-16 Liang Xu , Yi Cheng , Fan Zhang , Bingxuan Wu , Pengfei Shao , Peng Liu , Shuwei Shen , Peng Yao , Ronald X. Xu

The goal of this work is to localize sound sources in visual scenes with a self-supervised approach. Contrastive learning in the context of sound source localization leverages the natural correspondence between audio and visual signals…

计算机视觉与模式识别 · 计算机科学 2022-11-04 Sooyoung Park , Arda Senocak , Joon Son Chung
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