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We introduce Latent Action Pretraining for general Action models (LAPA), an unsupervised method for pretraining Vision-Language-Action (VLA) models without ground-truth robot action labels. Existing Vision-Language-Action models require…

Few-shot learning (FSL) is a central problem in meta-learning, where learners must efficiently learn from few labeled examples. Within FSL, feature pre-training has recently become an increasingly popular strategy to significantly improve…

Machine Learning · Computer Science 2023-11-07 Ruohan Wang , Isak Falk , Massimiliano Pontil , Carlo Ciliberto

Human action recognition refers to automatic recognizing human actions from a video clip. In reality, there often exist multiple human actions in a video stream. Such a video stream is often weakly-annotated with a set of relevant human…

Computer Vision and Pattern Recognition · Computer Science 2019-02-07 Qian Wang , Ke Chen

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…

Computer Vision and Pattern Recognition · Computer Science 2021-08-17 Jiahao Wang , Yunhong Wang , Sheng Liu , Annan Li

Generalized zero-shot skeleton-based action recognition (GZSSAR) is a new challenging problem in computer vision community, which requires models to recognize actions without any training samples. Previous studies only utilize the action…

Computer Vision and Pattern Recognition · Computer Science 2023-09-19 Ming-Zhe Li , Zhen Jia , Zhang Zhang , Zhanyu Ma , Liang Wang

Human action understanding is crucial for the advancement of multimodal systems. While recent developments, driven by powerful large language models (LLMs), aim to be general enough to cover a wide range of categories, they often overlook…

Computer Vision and Pattern Recognition · Computer Science 2025-01-03 Yongle Huang , Haodong Chen , Zhenbang Xu , Zihan Jia , Haozhou Sun , Dian Shao

There has been a remarkable progress in learning a model which could recognise novel classes with only a few labeled examples in the last few years. Few-shot learning (FSL) for action recognition is a challenging task of recognising novel…

Computer Vision and Pattern Recognition · Computer Science 2021-08-23 Neeraj Kumar , Siddhansh Narang

Few-shot video action recognition is an effective approach to recognizing new categories with only a few labeled examples, thereby reducing the challenges associated with collecting and annotating large-scale video datasets. Existing…

Computer Vision and Pattern Recognition · Computer Science 2023-09-18 Sarinda Samarasinghe , Mamshad Nayeem Rizve , Navid Kardan , Mubarak Shah

Few-shot action recognition aims to enable models to quickly learn new action categories from limited labeled samples, addressing the challenge of data scarcity in real-world applications. Current research primarily addresses three core…

Computer Vision and Pattern Recognition · Computer Science 2025-12-23 Xiaoyang Li , Mingming Lu , Ruiqi Wang , Hao Li , Zewei Le

In text classification tasks, useful information is encoded in the label names. Label semantic aware systems have leveraged this information for improved text classification performance during fine-tuning and prediction. However, use of…

Computation and Language · Computer Science 2022-05-31 Aaron Mueller , Jason Krone , Salvatore Romeo , Saab Mansour , Elman Mansimov , Yi Zhang , Dan Roth

Entity recognition is a fundamental task in understanding document images. Traditional sequence labeling frameworks treat the entity types as class IDs and rely on extensive data and high-quality annotations to learn semantics which are…

Computation and Language · Computer Science 2022-04-13 Zilong Wang , Jingbo Shang

Current state-of-the-art methods for skeleton-based action recognition are supervised and rely on labels. The reliance is limiting the performance due to the challenges involved in annotation and mislabeled data. Unsupervised methods have…

Computer Vision and Pattern Recognition · Computer Science 2020-12-09 Jingyuan Li , Eli Shlizerman

Medical anomaly detection (AD) is crucial for early clinical intervention, yet it faces challenges due to limited access to high-quality medical imaging data, caused by privacy concerns and data silos. Few-shot learning has emerged as a…

Computer Vision and Pattern Recognition · Computer Science 2025-05-23 Kaiyu Guo , Tan Pan , Chen Jiang , Zijian Wang , Brian C. Lovell , Limei Han , Yuan Cheng , Mahsa Baktashmotlagh

Vision-language-action models (VLAs) have shown generalization capabilities in robotic manipulation tasks by inheriting from vision-language models (VLMs) and learning action generation. Most VLA models focus on interpreting vision and…

Incremental few-shot semantic segmentation (IFSS) aims to incrementally extend a semantic segmentation model to novel classes according to only a few pixel-level annotated data, while preserving its segmentation capability on previously…

Computer Vision and Pattern Recognition · Computer Science 2023-05-19 Yuan Zhou , Xin Chen , Yanrong Guo , Shijie Hao , Richang Hong , Qi Tian

Teaching machines to recognize a new category based on few training samples especially only one remains challenging owing to the incomprehensive understanding of the novel category caused by the lack of data. However, human can learn new…

Computer Vision and Pattern Recognition · Computer Science 2021-11-09 Fengyuan Yang , Ruiping Wang , Xilin Chen

Learning to localize actions in long, cluttered, and untrimmed videos is a hard task, that in the literature has typically been addressed assuming the availability of large amounts of annotated training samples for each class -- either in a…

Computer Vision and Pattern Recognition · Computer Science 2021-09-24 Ting-Ting Xie , Christos Tzelepis , Fan Fu , Ioannis Patras

Few-shot Learning aims to learn and distinguish new categories with a very limited number of available images, presenting a significant challenge in the realm of deep learning. Recent researchers have sought to leverage the additional…

Computer Vision and Pattern Recognition · Computer Science 2024-03-26 Chunpeng Zhou , Haishuai Wang , Xilu Yuan , Zhi Yu , Jiajun Bu

Learning from large-scale contrastive language-image pre-training like CLIP has shown remarkable success in a wide range of downstream tasks recently, but it is still under-explored on the challenging few-shot action recognition (FSAR)…

Computer Vision and Pattern Recognition · Computer Science 2024-10-28 Xiang Wang , Shiwei Zhang , Jun Cen , Changxin Gao , Yingya Zhang , Deli Zhao , Nong Sang

Purpose: Surgical workflow analysis is crucial for improving surgical efficiency and safety. However, previous studies rely heavily on large-scale annotated datasets, posing challenges in cost, scalability, and reliance on expert…

Computer Vision and Pattern Recognition · Computer Science 2025-03-04 Tingxuan Chen , Kun Yuan , Vinkle Srivastav , Nassir Navab , Nicolas Padoy