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Most recent approaches for action recognition from video leverage deep architectures to encode the video clip into a fixed length representation vector that is then used for classification. For this to be successful, the network must be…

计算机视觉与模式识别 · 计算机科学 2018-08-30 Swathikiran Sudhakaran , Oswald Lanz

In an out-of-distribution (OOD) detection problem, samples of known classes(also called in-distribution classes) are used to train a special classifier. In testing, the classifier can (1) classify the test samples of known classes to their…

计算机视觉与模式识别 · 计算机科学 2023-02-06 Sepideh Esmaeilpour , Bing Liu , Eric Robertson , Lei Shu

Temporal Action Localization (TAL) has experienced remarkable success under the supervised learning paradigm. However, existing TAL methods are rooted in the closed set assumption, which cannot handle the inevitable unknown actions in…

计算机视觉与模式识别 · 计算机科学 2022-03-11 Wentao Bao , Qi Yu , Yu Kong

To recognize objects of the unseen classes, most existing Zero-Shot Learning(ZSL) methods first learn a compatible projection function between the common semantic space and the visual space based on the data of source seen classes, then…

计算机视觉与模式识别 · 计算机科学 2020-01-07 Ziyu Wan , Dongdong Chen , Yan Li , Xingguang Yan , Junge Zhang , Yizhou Yu , Jing Liao

Although visual navigation has been extensively studied using deep reinforcement learning, online learning for real-world robots remains a challenging task. Recent work directly learned from offline dataset to achieve broader generalization…

机器人学 · 计算机科学 2024-04-17 Chang Chen , Yuecheng Liu , Yuzheng Zhuang , Sitong Mao , Kaiwen Xue , Shunbo Zhou

This paper considers zero-shot Anomaly Detection (AD), performing AD without reference images of the test objects. We propose a framework called CLIP-AD to leverage the zero-shot capabilities of the large vision-language model CLIP.…

计算机视觉与模式识别 · 计算机科学 2024-03-05 Xuhai Chen , Jiangning Zhang , Guanzhong Tian , Haoyang He , Wuhao Zhang , Yabiao Wang , Chengjie Wang , Yong Liu

Few-shot action recognition aims to recognize action classes with few training samples. Most existing methods adopt a meta-learning approach with episodic training. In each episode, the few samples in a meta-training task are split into…

计算机视觉与模式识别 · 计算机科学 2021-10-26 Xiatian Zhu , Antoine Toisoul , Juan-Manuel Perez-Rua , Li Zhang , Brais Martinez , Tao Xiang

This paper studies the computational offloading of video action recognition in edge computing. To achieve effective semantic information extraction and compression, following semantic communication we propose a novel spatiotemporal…

计算机视觉与模式识别 · 计算机科学 2023-05-23 Nan Li , Mehdi Bennis , Alexandros Iosifidis , Qi Zhang

Online action detection in untrimmed videos aims to identify an action as it happens, which makes it very important for real-time applications. Previous methods rely on tedious annotations of temporal action boundaries for training, which…

计算机视觉与模式识别 · 计算机科学 2021-05-20 Mingfei Gao , Yingbo Zhou , Ran Xu , Richard Socher , Caiming Xiong

Temporal Action Localization (TAL) is a critical task in video analysis, identifying precise start and end times of actions. Existing methods like CNNs, RNNs, GCNs, and Transformers have limitations in capturing long-range dependencies and…

计算机视觉与模式识别 · 计算机科学 2024-07-19 Sangyoun Lee , Juho Jung , Changdae Oh , Sunghee Yun

Point-level weakly-supervised temporal action localization (PWTAL) aims to localize actions with only a single timestamp annotation for each action instance. Existing methods tend to mine dense pseudo labels to alleviate the label sparsity,…

计算机视觉与模式识别 · 计算机科学 2023-09-19 Yueyang Li , Yonghong Hou , Wanqing Li

Vision Transformer (ViT) has shown high potential in video recognition, owing to its flexible design, adaptable self-attention mechanisms, and the efficacy of masked pre-training. Yet, it remains unclear how to adapt these pre-trained…

计算机视觉与模式识别 · 计算机科学 2024-04-16 Min Yang , Huan Gao , Ping Guo , Limin Wang

The success of Zero-shot Action Recognition (ZSAR) methods is intrinsically related to the nature of semantic side information used to transfer knowledge, although this aspect has not been primarily investigated in the literature. This work…

计算机视觉与模式识别 · 计算机科学 2022-09-27 Valter Estevam , Rayson Laroca , Helio Pedrini , David Menotti

Zero-shot Learning(ZSL) attains knowledge transfer from seen classes to unseen classes by exploring auxiliary category information, which is a promising yet difficult research topic. In this field, Audio-Visual Generalized Zero-Shot…

计算机视觉与模式识别 · 计算机科学 2025-03-31 Yang Liu , Xun Zhang , Jiale Du , Xinbo Gao , Jungong Han

Zero-shot learning (ZSL) aims at recognizing classes for which no visual sample is available at training time. To address this issue, one can rely on a semantic description of each class. A typical ZSL model learns a mapping between the…

计算机视觉与模式识别 · 计算机科学 2022-09-29 Celina Hanouti , Hervé Le Borgne

This paper studies introducing viewpoint invariant feature representations in existing action recognition architecture. Despite significant progress in action recognition, efficiently handling geometric variations in large-scale datasets…

计算机视觉与模式识别 · 计算机科学 2023-08-22 Jinhui Ye , Junwei Liang

Stance detection is an important component of understanding hidden influences in everyday life. Since there are thousands of potential topics to take a stance on, most with little to no training data, we focus on zero-shot stance detection:…

计算与语言 · 计算机科学 2020-10-09 Emily Allaway , Kathleen McKeown

Zero-shot detection (ZSD), i.e., detection on classes not seen during training, is essential for real world detection use-cases, but remains a difficult task. Recent research attempts ZSD with detection models that output embeddings instead…

计算机视觉与模式识别 · 计算机科学 2023-06-13 Katharina Kornmeier , Ulla Scheler , Pascal Herrmann

The number of categories for action recognition is growing rapidly. It is thus becoming increasingly hard to collect sufficient training data to learn conventional models for each category. This issue may be ameliorated by the increasingly…

计算机视觉与模式识别 · 计算机科学 2015-11-17 Xun Xu , Timothy Hospedales , Shaogang Gong

Zero-shot learning (ZSL) for image classification focuses on recognizing novel categories that have no labeled data available for training. The learning is generally carried out with the help of mid-level semantic descriptors associated…

计算机视觉与模式识别 · 计算机科学 2019-03-29 Debasmit Das , C. S. George Lee