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Recognition of facial expression is a challenge when it comes to computer vision. The primary reasons are class imbalance due to data collection and uncertainty due to inherent noise such as fuzzy facial expressions and inconsistent labels.…

计算机视觉与模式识别 · 计算机科学 2022-12-16 Jiaxiang Fan , Jian Zhou , Xiaoyu Deng , Huabin Wang , Liang Tao , Hon Keung Kwan

Deep neural networks (DNNs) have achieved state-of-the-art results in various pattern recognition tasks. However, they perform poorly on out-of-distribution adversarial examples i.e. inputs that are specifically crafted by an adversary to…

密码学与安全 · 计算机科学 2019-05-09 Chirag Agarwal , Anh Nguyen , Dan Schonfeld

Margin maximization in the hard-margin sense, proposed as feature elimination criterion by the MFE-LO method, is combined here with data radius utilization to further aim to lower generalization error, as several published bounds and…

机器学习 · 统计学 2014-05-13 Yaman Aksu

Conventional feature extraction techniques in the face anti-spoofing domain either analyze the entire video sequence or focus on a specific segment to improve model performance. However, identifying the optimal frames that provide the most…

计算机视觉与模式识别 · 计算机科学 2023-09-12 Usman Muhammad , Mourad Oussalah , Jorma Laaksonen

Previous deep image registration methods that employ single homography, multi-grid homography, or thin-plate spline often struggle with real scenes containing depth disparities due to their inherent limitations. To address this, we propose…

计算机视觉与模式识别 · 计算机科学 2025-09-10 Haokai Zhu , Bo Qu , Si-Yuan Cao , Runmin Zhang , Shujie Chen , Bailin Yang , Hui-Liang Shen

In this study, we show that landmark detection or face alignment task is not a single and independent problem. Instead, its robustness can be greatly improved with auxiliary information. Specifically, we jointly optimize landmark detection…

计算机视觉与模式识别 · 计算机科学 2016-11-15 Zhanpeng Zhang , Ping Luo , Chen Change Loy , Xiaoou Tang

We consider the problem of cost sensitive multiclass classification, where we would like to increase the sensitivity of an important class at the expense of a less important one. We adopt an {\em apportioned margin} framework to address…

机器学习 · 计算机科学 2020-02-05 Lee-Ad Gottlieb , Eran Kaufman , Aryeh Kontorovich

Recent successes of deep learning-based recognition rely on maintaining the content related to the main-task label. However, how to explicitly dispel the noisy signals for better generalization in a controllable manner remains an open…

计算机视觉与模式识别 · 计算机科学 2020-06-16 Xiaofeng Liu

In recent years, the performance of face verification and recognition systems based on deep convolutional neural networks (DCNNs) has significantly improved. A typical pipeline for face verification includes training a deep network for…

计算机视觉与模式识别 · 计算机科学 2019-02-05 Rajeev Ranjan , Ankan Bansal , Hongyu Xu , Swami Sankaranarayanan , Jun-Cheng Chen , Carlos D. Castillo , Rama Chellappa

Deep neural networks trained using a softmax layer at the top and the cross-entropy loss are ubiquitous tools for image classification. Yet, this does not naturally enforce intra-class similarity nor inter-class margin of the learned deep…

计算机视觉与模式识别 · 计算机科学 2017-12-06 José Lezama , Qiang Qiu , Pablo Musé , Guillermo Sapiro

Accurate representations of 3D faces are of paramount importance in various computer vision and graphics applications. However, the challenges persist due to the limitations imposed by data discretization and model linearity, which hinder…

计算机视觉与模式识别 · 计算机科学 2024-10-14 Mingwu Zheng , Haiyu Zhang , Hongyu Yang , Liming Chen , Di Huang

Precise representations of 3D faces are beneficial to various computer vision and graphics applications. Due to the data discretization and model linearity, however, it remains challenging to capture accurate identity and expression clues…

计算机视觉与模式识别 · 计算机科学 2022-04-26 Mingwu Zheng , Hongyu Yang , Di Huang , Liming Chen

Face anti-spoofing (FAS) plays a vital role in securing the face recognition systems from presentation attacks. Most existing FAS methods capture various cues (e.g., texture, depth and reflection) to distinguish the live faces from the…

计算机视觉与模式识别 · 计算机科学 2020-07-07 Zitong Yu , Xiaobai Li , Xuesong Niu , Jingang Shi , Guoying Zhao

Robustness of deep neural networks to input noise remains a critical challenge, as naive noise injection often degrades accuracy on clean (uncorrupted) data. We propose a novel training framework that addresses this trade-off through two…

机器学习 · 统计学 2026-01-06 Hai-Vy Nguyen , Fabrice Gamboa , Sixin Zhang , Reda Chhaibi , Serge Gratton , Thierry Giaccone

In the field of face recognition, a model learns to distinguish millions of face images with fewer dimensional embedding features, and such vast information may not be properly encoded in the conventional model with a single branch. We…

计算机视觉与模式识别 · 计算机科学 2020-05-26 Yonghyun Kim , Wonpyo Park , Myung-Cheol Roh , Jongju Shin

In diffusion and flow-matching generative models, guidance techniques are widely used to improve sample quality and consistency. Classifier-free guidance (CFG) is the de facto choice in modern systems and achieves this by contrasting…

计算机视觉与模式识别 · 计算机科学 2025-12-22 Ankit Yadav , Ta Duc Huy , Lingqiao Liu

Deep convolutional neural networks have achieved remarkable success in face recognition (FR), partly due to the abundant data availability. However, the current training benchmarks exhibit an imbalanced quality distribution; most images are…

计算机视觉与模式识别 · 计算机科学 2023-08-21 Sahar Rahimi Malakshan , Mohammad Saeed Ebrahimi Saadabadi , Nima Najafzadeh , Nasser M. Nasrabadi

Although deep learning has significantly improved Face Recognition (FR), dramatic performance deterioration may occur when processing Low Resolution (LR) faces. To alleviate this, approaches based on unified feature space are proposed with…

计算机视觉与模式识别 · 计算机科学 2023-02-14 Xu Ling , Yichen Lu , Wenqi Xu , Weihong Deng , Yingjie Zhang , Xingchen Cui , Hongzhi Shi , Dongchao Wen

Face detection serves as a fundamental research topic for many applications like face recognition. Impressive progress has been made especially with the recent development of convolutional neural networks. However, the issue of large scale…

计算机视觉与模式识别 · 计算机科学 2018-04-24 Jianfeng Wang , Ye Yuan , Boxun Li , Gang Yu , Sun Jian

Despite the undeniable progress in visual recognition tasks fueled by deep neural networks, there exists recent evidence showing that these models are poorly calibrated, resulting in over-confident predictions. The standard practices of…

计算机视觉与模式识别 · 计算机科学 2024-02-01 Balamurali Murugesan , Bingyuan Liu , Adrian Galdran , Ismail Ben Ayed , Jose Dolz