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Weakly supervised violence detection refers to the technique of training models to identify violent segments in videos using only video-level labels. Among these approaches, multimodal violence detection, which integrates modalities such as…

计算机视觉与模式识别 · 计算机科学 2025-03-17 Wenping Jin , Li Zhu , Jing Sun

Few-shot learning problem focuses on recognizing unseen classes given a few labeled images. In recent effort, more attention is paid to fine-grained feature embedding, ignoring the relationship among different distance metrics. In this…

计算机视觉与模式识别 · 计算机科学 2022-11-03 Jinxiang Lai , Siqian Yang , Guannan Jiang , Xi Wang , Yuxi Li , Zihui Jia , Xiaochen Chen , Jun Liu , Bin-Bin Gao , Wei Zhang , Yuan Xie , Chengjie Wang

Presentation Attack Detection (PAD) has been extensively studied, particularly in the visible spectrum. With the advancement of sensing technology beyond the visible range, multispectral imaging has gained significant attention in this…

计算机视觉与模式识别 · 计算机科学 2023-11-21 Narayan Vetrekar , Raghavendra Ramachandra , Sushma Venkatesh , Jyoti D. Pawar , R. S. Gad

We uncover an ever-overlooked deficiency in the prevailing Few-Shot Learning (FSL) methods: the pre-trained knowledge is indeed a confounder that limits the performance. This finding is rooted from our causal assumption: a Structural Causal…

机器学习 · 计算机科学 2020-12-07 Zhongqi Yue , Hanwang Zhang , Qianru Sun , Xian-Sheng Hua

Device fingerprinting combined with Machine and Deep Learning (ML/DL) report promising performance when detecting cyberattacks targeting data managed by resource-constrained spectrum sensors. However, the amount of data needed to train…

Few-shot learning (FSL) aims to learn a classifier that can be easily adapted to recognize novel classes with only a few labeled examples. Some recent work about FSL has yielded promising classification performance, where the image-level…

计算机视觉与模式识别 · 计算机科学 2023-06-16 Jianpeng Yang , Yuhang Niu , Xuemei Xie , Guangming Shi

Few-shot named entity recognition (NER) systems aim at recognizing novel-class named entities based on only a few labeled examples. In this paper, we present a decomposed meta-learning approach which addresses the problem of few-shot NER by…

计算与语言 · 计算机科学 2022-04-14 Tingting Ma , Huiqiang Jiang , Qianhui Wu , Tiejun Zhao , Chin-Yew Lin

Few-shot learning (FSL) is a challenging task in machine learning, demanding a model to render discriminative classification by using only a few labeled samples. In the literature of FSL, deep models are trained in a manner of metric…

计算机视觉与模式识别 · 计算机科学 2025-01-27 Tong Wu , Takumi Kobayashi

Market research indicates that fingerprints are still the most popular biometric modality for personal authentication. Even with the onset of new modalities (e.g. vein matching), many applications within different domains (e-ID, banking,…

计算机视觉与模式识别 · 计算机科学 2015-05-21 Mehmet Kayaoglu , Berkay Topcu , Umut Uludag

Effective deep feature extraction via feature-level fusion is crucial for multimodal object detection. However, previous studies often involve complex training processes that integrate modality-specific features by stacking multiple…

计算机视觉与模式识别 · 计算机科学 2025-06-27 Lei Hao , Lina Xu , Chang Liu , Yanni Dong

As generative artificial intelligence evolves, deepfake attacks have escalated from single-modality manipulations to complex, multimodal threats. Existing forensic techniques face a severe generalization bottleneck: by relying excessively…

计算机视觉与模式识别 · 计算机科学 2026-04-10 Jingtong Dou , Chuancheng Shi , Jian Wang , Fei Shen , Zhiyong Wang , Tat-Seng Chua

Along with the widespread use of face recognition systems, their vulnerability has become highlighted. While existing face anti-spoofing methods can be generalized between attack types, generic solutions are still challenging due to the…

计算机视觉与模式识别 · 计算机科学 2022-12-09 Kaicheng Li , Hongyu Yang , Binghui Chen , Pengyu Li , Biao Wang , Di Huang

Face morphing represents nowadays a big security threat in the context of electronic identity documents as well as an interesting challenge for researchers in the field of face recognition. Despite of the good performance obtained by…

计算机视觉与模式识别 · 计算机科学 2021-02-25 Matteo Ferrara , Annalisa Franco , Davide Maltoni

When compared to unimodal systems, multimodal biometric systems have several advantages, including lower error rate, higher accuracy, and larger population coverage. However, multimodal systems have an increased demand for integrity and…

计算机视觉与模式识别 · 计算机科学 2021-01-01 Veeru Talreja , Matthew Valenti , Nasser Nasrabadi

Automatic border control systems are wide spread in modern airports worldwide. Morphing attacks on face biometrics is a serious threat that undermines the security and reliability of face recognition systems deployed in airports and border…

计算机视觉与模式识别 · 计算机科学 2023-10-18 Sherko R. HmaSalah , Aras Asaad

Face Anti-Spoofing (FAS) is essential to secure face recognition systems and has been extensively studied in recent years. Although deep neural networks (DNNs) for the FAS task have achieved promising results in intra-dataset experiments…

计算机视觉与模式识别 · 计算机科学 2022-05-18 Rizhao Cai , Zhi Li , Renjie Wan , Haoliang Li , Yongjian Hu , Alex Chichung Kot

Face anti-spoofing (FAS) is crucial for protecting facial recognition systems from presentation attacks. Previous methods approached this task as a classification problem, lacking interpretability and reasoning behind the predicted results.…

计算机视觉与模式识别 · 计算机科学 2025-11-18 Hongyang Wang , Yichen Shi , Zhuofu Tao , Yuhao Gao , Liepiao Zhang , Xun Lin , Jun Feng , Xiaochen Yuan , Zitong Yu , Xiaochun Cao

Fingerprint recognition systems are widely deployed in various real-life applications as they have achieved high accuracy. The widely used applications include border control, automated teller machine (ATM), and attendance monitoring…

计算机视觉与模式识别 · 计算机科学 2020-05-19 Jag Mohan Singh , Ahmed Madhun , Guoqiang Li , Raghavendra Ramachandra

Few-shot object detection (FSOD) aims to detect never-seen objects using few examples. This field sees recent improvement owing to the meta-learning techniques by learning how to match between the query image and few-shot class examples,…

计算机视觉与模式识别 · 计算机科学 2022-05-10 Guangxing Han , Yicheng He , Shiyuan Huang , Jiawei Ma , Shih-Fu Chang

Fine-grained action recognition is attracting increasing attention due to the emerging demand of specific action understanding in real-world applications, whereas the data of rare fine-grained categories is very limited. Therefore, we…

计算机视觉与模式识别 · 计算机科学 2021-08-17 Jiahao Wang , Yunhong Wang , Sheng Liu , Annan Li