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The goal of video anomaly detection is tantamount to performing spatio-temporal localization of abnormal events in the video. The multiscale temporal dependencies, visual-semantic heterogeneity, and the scarcity of labeled data exhibited by…

计算机视觉与模式识别 · 计算机科学 2025-07-29 Dezhi An , Wenqiang Liu , Kefan Wang , Zening Chen , Jun Lu , Shengcai Zhang

Information retrieval (IR) in dynamic data streams is a crucial task, as shifts in data distribution degrade the performance of AI-powered IR systems. To mitigate this issue, memory-based continual learning has been widely adopted for IR.…

信息检索 · 计算机科学 2026-01-13 HuiJeong Son , Hyeongu Kang , Sunho Kim , Subeen Ho , SeongKu Kang , Dongha Lee , Susik Yoon

Recent vision transformer based video models mostly follow the ``image pre-training then finetuning" paradigm and have achieved great success on multiple video benchmarks. However, full finetuning such a video model could be computationally…

计算机视觉与模式识别 · 计算机科学 2023-02-07 Taojiannan Yang , Yi Zhu , Yusheng Xie , Aston Zhang , Chen Chen , Mu Li

Despite significant progress in video question answering (VideoQA), existing methods fall short of questions that require causal/temporal reasoning across frames. This can be attributed to imprecise motion representations. We introduce…

计算机视觉与模式识别 · 计算机科学 2023-09-06 Junwen Chen , Jie Zhu , Yu Kong

Video-language pre-trained models have shown remarkable success in guiding video question-answering (VideoQA) tasks. However, due to the length of video sequences, training large-scale video-based models incurs considerably higher costs…

计算机视觉与模式识别 · 计算机科学 2023-08-17 Guangyi Chen , Xiao Liu , Guangrun Wang , Kun Zhang , Philip H. S. Torr , Xiao-Ping Zhang , Yansong Tang

Modern adaptive optimization methods, such as Adam and its variants, have emerged as the most widely used tools in deep learning over recent years. These algorithms offer automatic mechanisms for dynamically adjusting the update step based…

机器学习 · 计算机科学 2025-02-12 Son Nguyen , Bo Liu , Lizhang Chen , Qiang Liu

Online learning via Bayes' theorem allows new data to be continuously integrated into an agent's current beliefs. However, a naive application of Bayesian methods in non stationary environments leads to slow adaptation and results in state…

机器学习 · 计算机科学 2022-02-09 Josue Nassar , Jennifer Brennan , Ben Evans , Kendall Lowrey

Cooperation between temporal convolutional networks (TCN) and graph convolutional networks (GCN) as a processing module has shown promising results in skeleton-based video anomaly detection (SVAD). However, to maintain a lightweight model…

计算机视觉与模式识别 · 计算机科学 2024-06-06 Ruituo Wu , Yang Chen , Jian Xiao , Bing Li , Jicong Fan , Frédéric Dufaux , Ce Zhu , Yipeng Liu

Dynamic model averaging (DMA) combines the forecasts of a large number of dynamic linear models (DLMs) to predict the future value of a time series. The performance of DMA critically depends on the appropriate choice of two forgetting…

计量经济学 · 经济学 2019-12-11 Alisa Yusupova , Nicos G. Pavlidis , Efthymios G. Pavlidis

Source-free active domain adaptation (SFADA) enhances knowledge transfer from a source model to an unlabeled target domain using limited manual labels selected via active learning. While recent domain adaptation studies have introduced…

计算机视觉与模式识别 · 计算机科学 2025-09-30 Xi Chen , Hongxun Yao , Zhaopan Xu , Kui Jiang

The advancement of Multimodal Large Language Models (MLLMs) has driven significant progress in Visual Question Answering (VQA), evolving from Single to Multi Image VQA (MVQA). However, the increased number of images in MVQA inevitably…

计算机视觉与模式识别 · 计算机科学 2025-08-26 Kang Zeng , Guojin Zhong , Jintao Cheng , Jin Yuan , Zhiyong Li

Optimization algorithms with momentum, e.g., (ADAM), have been widely used for building deep learning models due to the faster convergence rates compared with stochastic gradient descent (SGD). Momentum helps accelerate SGD in the relevant…

机器学习 · 计算机科学 2020-01-24 Jiyang Bai , Yuxiang Ren , Jiawei Zhang

Existing video domain adaption (DA) methods need to store all temporal combinations of video frames or pair the source and target videos, which are memory cost expensive and can't scale up to long videos. To address these limitations, we…

计算机视觉与模式识别 · 计算机科学 2022-08-16 Xinyue Hu , Lin Gu , Liangchen Liu , Ruijiang Li , Chang Su , Tatsuya Harada , Yingying Zhu

The paper derives analytical expressions for the asymptotic average updating direction of the adaptive moment generation (ADAM) algorithm when applied to recursive identification of nonlinear systems. It is proved that the standard…

系统与控制 · 电气工程与系统科学 2025-10-24 Torbjörn Wigren , Ruoqi Zhang , Per Mattsson

Despite the recent progress made in Video Question-Answering (VideoQA), these methods typically function as black-boxes, making it difficult to understand their reasoning processes and perform consistent compositional reasoning. To address…

计算机视觉与模式识别 · 计算机科学 2024-07-04 Zhaohe Liao , Jiangtong Li , Li Niu , Liqing Zhang

Dynamic Adaptive Streaming over HTTP (DASH) is a video streaming technique largely used. One key point is the adaptation mechanism which resides at the client's side. This mechanism impacts greatly on the overall Quality of Experience (QoE)…

多媒体 · 计算机科学 2020-12-17 Mustafa Othman , Ken Chen , Anissa Mokraoui

Deep learning models, in particular \textit{image} models, have recently gained generalisability and robustness. %are becoming more general and robust by the day. In this work, we propose to exploit such advances in the realm of…

计算机视觉与模式识别 · 计算机科学 2024-11-05 Tanay Agrawal , Abid Ali , Antitza Dantcheva , Francois Bremond

Alternating Direction Method of Multipliers (ADMM) has been used successfully in many conventional machine learning applications and is considered to be a useful alternative to Stochastic Gradient Descent (SGD) as a deep learning optimizer.…

最优化与控制 · 数学 2021-07-07 Junxiang Wang , Fuxun Yu , Xiang Chen , Liang Zhao

Class-Incremental Learning (CIL) requires models to continuously acquire new classes without forgetting previously learned ones. A dominant paradigm involves freezing a pre-trained model and training lightweight, task-specific adapters.…

计算机视觉与模式识别 · 计算机科学 2026-01-30 Ruiqi Liu , Boyu Diao , Zijia An , Zhulin An , Fei Wang , Yongjun Xu

Researchers have long tried to minimize training costs in deep learning while maintaining strong generalization across diverse datasets. Emerging research on dataset distillation aims to reduce training costs by creating a small synthetic…

计算机视觉与模式识别 · 计算机科学 2025-03-25 Ahmad Sajedi , Samir Khaki , Ehsan Amjadian , Lucy Z. Liu , Yuri A. Lawryshyn , Konstantinos N. Plataniotis