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Recently, various contrastive learning techniques have been developed to categorize time series data and exhibit promising performance. A general paradigm is to utilize appropriate augmentations and construct feasible positive samples such…

机器学习 · 计算机科学 2024-10-11 Qianying Ren , Dongsheng Luo , Dongjin Song

Unsupervised object-centric learning from videos is a promising approach to extract structured representations from large, unlabeled collections of videos. To support downstream tasks like autonomous control, these representations must be…

计算机视觉与模式识别 · 计算机科学 2025-03-19 Anna Manasyan , Maximilian Seitzer , Filip Radovic , Georg Martius , Andrii Zadaianchuk

Audio deepfakes pose a significant security threat, yet current state-of-the-art (SOTA) detection systems do not generalize well to realistic in-the-wild deepfakes. We introduce a novel \textbf{I}n-\textbf{C}ontext \textbf{L}earning…

声音 · 计算机科学 2026-04-21 Benjamin Chou , Yi Zhu , Surya Koppisetti

The challenge in sourcing attribution for forgery faces has gained widespread attention due to the rapid development of generative techniques. While many recent works have taken essential steps on GAN-generated faces, more threatening…

计算机视觉与模式识别 · 计算机科学 2023-09-22 Zhimin Sun , Shen Chen , Taiping Yao , Bangjie Yin , Ran Yi , Shouhong Ding , Lizhuang Ma

In this paper, we present a new cross-architecture contrastive learning (CACL) framework for self-supervised video representation learning. CACL consists of a 3D CNN and a video transformer which are used in parallel to generate diverse…

计算机视觉与模式识别 · 计算机科学 2022-05-27 Sheng Guo , Zihua Xiong , Yujie Zhong , Limin Wang , Xiaobo Guo , Bing Han , Weilin Huang

Face presentation attack detection (PAD) is essential to secure face recognition systems primarily from high-fidelity mask attacks. Most existing 3D mask PAD benchmarks suffer from several drawbacks: 1) a limited number of mask identities,…

计算机视觉与模式识别 · 计算机科学 2021-04-14 Ajian Liu , Chenxu Zhao , Zitong Yu , Jun Wan , Anyang Su , Xing Liu , Zichang Tan , Sergio Escalera , Junliang Xing , Yanyan Liang , Guodong Guo , Zhen Lei , Stan Z. Li , Du Zhang

Recent proliferation of generative AI tools for visual content creation-particularly in the context of visual artworks-has raised serious concerns about copyright infringement and forgery. The large-scale datasets used to train these models…

计算机视觉与模式识别 · 计算机科学 2025-05-14 Haroon Wahab , Hassan Ugail , Irfan Mehmood

Query-focused summarization (QFS) aims to provide a summary of a single document/multi documents that can satisfy the information needs of a given query. It is useful for various real-world applications, such as abstractive snippet…

计算与语言 · 计算机科学 2026-01-06 Zhichao Xu

With video-level labels, weakly supervised temporal action localization (WTAL) applies a localization-by-classification paradigm to detect and classify the action in untrimmed videos. Due to the characteristic of classification,…

计算机视觉与模式识别 · 计算机科学 2022-07-15 Ziqiang Li , Yongxin Ge , Jiaruo Yu , Zhongming Chen

Modern self-supervised learning algorithms typically enforce persistency of instance representations across views. While being very effective on learning holistic image and video representations, such an objective becomes sub-optimal for…

计算机视觉与模式识别 · 计算机科学 2022-04-05 Liangzhe Yuan , Rui Qian , Yin Cui , Boqing Gong , Florian Schroff , Ming-Hsuan Yang , Hartwig Adam , Ting Liu

Vision-Language-Action (VLA) models process visual inputs independently at each timestep, discarding valuable temporal information inherent in robotic manipulation tasks. This frame-by-frame processing makes models vulnerable to visual…

计算机视觉与模式识别 · 计算机科学 2025-11-17 Chenghao Liu , Jiachen Zhang , Chengxuan Li , Zhimu Zhou , Shixin Wu , Songfang Huang , Huiling Duan

Recent advances in open-vocabulary object detection focus primarily on two aspects: scaling up datasets and leveraging contrastive learning to align language and vision modalities. However, these approaches often neglect internal…

计算机视觉与模式识别 · 计算机科学 2026-03-30 Bozhao Li , Shaocong Wu , Tong Shao , Senqiao Yang , Qiben Shan , Zhuotao Tian , Jingyong Su

Unsupervised anomalous sound detection aims to detect unknown anomalous sounds by training a model using only normal audio data. Despite advancements in self-supervised methods, the issue of frequent false alarms when handling samples of…

声音 · 计算机科学 2025-09-19 Shun Huang , Zhihua Fang , Liang He

Most studies focused on information retrieval-based techniques for fault localization, which built representations for bug reports and source code files and matched their semantic vectors through similarity measurement. However, such…

软件工程 · 计算机科学 2026-02-06 Chunying Zhou , Xiaoyuan Xie , Gong Chen , Peng He , Bing Li

As an exemplary self-supervised approach for representation learning, time-series contrastive learning has exhibited remarkable advancements in contemporary research. While recent contrastive learning strategies have focused on how to…

机器学习 · 计算机科学 2024-08-27 Xiyuan Jin , Jing Wang , Lei Liu , Youfang Lin

We present a novel approach for the detection of deepfake videos using a pair of vision transformers pre-trained by a self-supervised masked autoencoding setup. Our method consists of two distinct components, one of which focuses on…

计算机视觉与模式识别 · 计算机科学 2024-02-12 Sayantan Das , Mojtaba Kolahdouzi , Levent Özparlak , Will Hickie , Ali Etemad

Large Language Models (LLMs) have demonstrated remarkable success across diverse fields, establishing a powerful paradigm for complex information processing. This has inspired the integration of speech into LLM frameworks, often by…

音频与语音处理 · 电气工程与系统科学 2025-12-30 Xiangyu Zhang , Fuming Fang , Peng Gao , Bin Qin , Beena Ahmed , Julien Epps

Contextual information plays a core role for video semantic segmentation (VSS). This paper summarizes contexts for VSS in two-fold: local temporal contexts (LTC) which define the contexts from neighboring frames, and global temporal…

计算机视觉与模式识别 · 计算机科学 2024-04-10 Guolei Sun , Yun Liu , Henghui Ding , Min Wu , Luc Van Gool

Due to the advantages of leveraging unlabeled data and learning meaningful representations, semi-supervised learning and contrastive learning have been progressively combined to achieve better performances in popular applications with few…

计算机视觉与模式识别 · 计算机科学 2023-12-27 Bowen Tao , Lan Li , Xin-Chun Li , De-Chuan Zhan

Hierarchical Federated Learning (HFL) has recently emerged as a promising solution for intelligent decision-making in vehicular networks, helping to address challenges such as limited communication resources, high vehicle mobility, and data…

密码学与安全 · 计算机科学 2025-05-05 M. Saeid HaghighiFard , Sinem Coleri