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Actions are more than just movements and trajectories: we cook to eat and we hold a cup to drink from it. A thorough understanding of videos requires going beyond appearance modeling and necessitates reasoning about the sequence of…

计算机视觉与模式识别 · 计算机科学 2017-07-25 Gunnar A. Sigurdsson , Santosh Divvala , Ali Farhadi , Abhinav Gupta

Large-scale general domain pretraining followed by downstream-specific finetuning has become a predominant paradigm in machine learning. However, discrepancies between the pretraining and target domains can still lead to performance…

机器学习 · 计算机科学 2024-10-15 Ruiyi Zhang , Sai Ashish Somayajula , Pengtao Xie

Video Large Language Models (VideoLLMs) have made significant strides in video understanding but struggle with long videos due to the limitations of their backbone LLMs. Existing solutions rely on length extrapolation, which is…

计算机视觉与模式识别 · 计算机科学 2025-03-25 Xiao Wang , Qingyi Si , Jianlong Wu , Shiyu Zhu , Li Cao , Liqiang Nie

Weakly-supervised temporal action localization aims to localize and recognize actions in untrimmed videos with only video-level category labels during training. Without instance-level annotations, most existing methods follow the…

计算机视觉与模式识别 · 计算机科学 2023-05-30 Huan Ren , Wenfei Yang , Tianzhu Zhang , Yongdong Zhang

World models predict future transitions from observations and actions. Existing works predominantly focus on image generation only. Visual feature-based world models, on the other hand, predict future visual features instead of raw video…

计算机视觉与模式识别 · 计算机科学 2026-05-11 Xinyu Zhang , Zhengtong Xu , Yutian Tao , Yeping Wang , Yu She , Abdeslam Boularias

We propose a method for generating a temporally remapped video that matches the desired target duration while maximally preserving natural video dynamics. Our approach trains a neural network through self-supervision to recognize and…

计算机视觉与模式识别 · 计算机科学 2022-05-12 Simon Jenni , Markus Woodson , Fabian Caba Heilbron

In this paper, we develop an efficient multi-scale network to predict action classes in partial videos in an end-to-end manner. Unlike most existing methods with offline feature generation, our method directly takes frames as input and…

计算机视觉与模式识别 · 计算机科学 2023-01-04 Xiaofa Liu , Jianqin Yin , Yuan Sun , Zhicheng Zhang , Jin Tang

Many studies combine text and audio to capture multi-modal information but they overlook the model's generalization ability on new datasets. Introducing new datasets may affect the feature space of the original dataset, leading to…

声音 · 计算机科学 2025-07-29 Yingfei Sun , Xu Gu , Wei Ji , Hanbin Zhao , Yifang Yin , Roger Zimmermann

Automaton based approaches have enabled robots to perform various complex tasks. However, most existing automaton based algorithms highly rely on the manually customized representation of states for the considered task, limiting its…

机器人学 · 计算机科学 2023-07-18 Hao Zhang , Hao Wang , Zhen Kan

The present few-shot temporal action localization model can't handle the situation where videos contain multiple action instances. So the purpose of this paper is to achieve manifold action instances localization in a lengthy untrimmed…

计算机视觉与模式识别 · 计算机科学 2024-08-27 Fengshun Wang , Qiurui Wang , Yuting Wang

Backdoor attacks present a substantial security concern for deep learning models, especially those utilized in applications critical to safety and security. These attacks manipulate model behavior by embedding a hidden trigger during the…

机器学习 · 计算机科学 2024-01-09 Yujing Jiang , Xingjun Ma , Sarah Monazam Erfani , Yige Li , James Bailey

Temporal action detection (TAD) is an important yet challenging task in video understanding. It aims to simultaneously predict the semantic label and the temporal interval of every action instance in an untrimmed video. Rather than…

计算机视觉与模式识别 · 计算机科学 2022-04-07 Xiaolong Liu , Song Bai , Xiang Bai

Weakly-supervised temporal action localization (WTAL) learns to detect and classify action instances with only category labels. Most methods widely adopt the off-the-shelf Classification-Based Pre-training (CBP) to generate video features…

计算机视觉与模式识别 · 计算机科学 2022-12-20 Chen Ju , Kunhao Zheng , Jinxiang Liu , Peisen Zhao , Ya Zhang , Jianlong Chang , Yanfeng Wang , Qi Tian

Retrieval-augmented models couple parametric predictors with non-parametric memories, but their use in streaming supervised learning with concept drift is not well understood. We study online classification in non-stationary environments…

机器学习 · 计算机科学 2025-12-03 Wenzhang Du

Weakly supervised temporal action localization is a challenging vision task due to the absence of ground-truth temporal locations of actions in the training videos. With only video-level supervision during training, most existing methods…

计算机视觉与模式识别 · 计算机科学 2021-03-26 Ashraful Islam , Chengjiang Long , Richard Radke

Although numerous recent tracking approaches have made tremendous advances in the last decade, achieving high-performance visual tracking remains a challenge. In this paper, we propose an end-to-end network model to learn reinforced…

计算机视觉与模式识别 · 计算机科学 2020-01-03 Peng Gao , Qiquan Zhang , Fei Wang , Liyi Xiao , Hamido Fujita , Yan Zhang

The remastering of vintage film comprises of a diversity of sub-tasks including super-resolution, noise removal, and contrast enhancement which aim to restore the deteriorated film medium to its original state. Additionally, due to the…

计算机视觉与模式识别 · 计算机科学 2020-09-21 Satoshi Iizuka , Edgar Simo-Serra

Reinforcement learning (RL) post-training for Large Language Models (LLMs) is now scaling to large clusters and running for extended durations to enhance model reasoning performance. However, the scalability of existing RL frameworks is…

Temporal grounding of natural language in untrimmed videos is a fundamental yet challenging multimedia task facilitating cross-media visual content retrieval. We focus on the weakly supervised setting of this task that merely accesses to…

计算机视觉与模式识别 · 计算机科学 2020-09-21 Jie Wu , Guanbin Li , Xiaoguang Han , Liang Lin

In this work we release our extensible and easily configurable neural network training software. It provides a rich set of functional layers with a particular focus on efficient training of recurrent neural network topologies on multiple…

机器学习 · 计算机科学 2017-01-11 Patrick Doetsch , Albert Zeyer , Paul Voigtlaender , Ilya Kulikov , Ralf Schlüter , Hermann Ney