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Sign Language Recognition (SLR) is a challenging research area in computer vision. To tackle the annotation bottleneck in SLR, we formulate the problem of Zero-Shot Sign Language Recognition (ZS-SLR) and propose a two-stream model from two…

Computer Vision and Pattern Recognition · Computer Science 2021-08-24 Razieh Rastgoo , Kourosh Kiani , Sergio Escalera

Human action recognition often struggles with deep semantic understanding, complex contextual information, and fine-grained distinction, limitations that traditional methods frequently encounter when dealing with diverse video data.…

Computer Vision and Pattern Recognition · Computer Science 2025-09-09 Jingwei Peng , Zhixuan Qiu , Boyu Jin , Surasakdi Siripong

Few-Shot Action Recognition (FSAR) aims to train a model with only a few labeled video instances. A key challenge in FSAR is handling divergent narrative trajectories for precise video matching. While the frame- and tuple-level alignment…

Computer Vision and Pattern Recognition · Computer Science 2025-04-09 SuBeen Lee , WonJun Moon , Hyun Seok Seong , Jae-Pil Heo

Vision-Language Models (VLMs), pre-trained on large-scale datasets, have shown impressive performance in various visual recognition tasks. This advancement paves the way for notable performance in Zero-Shot Egocentric Action Recognition…

Computer Vision and Pattern Recognition · Computer Science 2024-05-14 Guangzhao Dai , Xiangbo Shu , Wenhao Wu , Rui Yan , Jiachao Zhang

Temporal Action Segmentation (TAS) requires dividing videos into action segments, yet the vast space of activities and alternative breakdowns makes collecting comprehensive datasets infeasible. Existing methods remain limited to closed…

Computer Vision and Pattern Recognition · Computer Science 2026-02-26 Asim Unmesh , Kaki Ramesh , Mayank Patel , Rahul Jain , Karthik Ramani

Large scale Vision-Language (VL) models have shown tremendous success in aligning representations between visual and text modalities. This enables remarkable progress in zero-shot recognition, image generation & editing, and many other…

Computer Vision and Pattern Recognition · Computer Science 2023-07-25 Wei Lin , Leonid Karlinsky , Nina Shvetsova , Horst Possegger , Mateusz Kozinski , Rameswar Panda , Rogerio Feris , Hilde Kuehne , Horst Bischof

Accurate video moment retrieval (VMR) requires universal visual-textual correlations that can handle unknown vocabulary and unseen scenes. However, the learned correlations are likely either biased when derived from a limited amount of…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 Dezhao Luo , Jiabo Huang , Shaogang Gong , Hailin Jin , Yang Liu

Robustness to domain changes is a key capability for effective deployment of human action recognition systems in real-world scenarios, where action categories at inference can present important domain shifts or even unseen actions from…

Computer Vision and Pattern Recognition · Computer Science 2026-05-22 Yannick Porto , Renato Martins , Thomas Chalumeau , Cedric Demonceaux

We introduce Skeleton-Cache, the first training-free test-time adaptation framework for skeleton-based zero-shot action recognition (SZAR), aimed at improving model generalization to unseen actions during inference. Skeleton-Cache…

Computer Vision and Pattern Recognition · Computer Science 2025-12-15 Jingmin Zhu , Anqi Zhu , Hossein Rahmani , Jun Liu , Mohammed Bennamoun , Qiuhong Ke

Detecting actions as they occur is essential for applications like video surveillance, autonomous driving, and human-robot interaction. Known as online action detection, this task requires classifying actions in streaming videos, handling…

Computer Vision and Pattern Recognition · Computer Science 2026-01-30 Manuel Benavent-Lledo , David Mulero-Pérez , David Ortiz-Perez , Jose Garcia-Rodriguez

Tactile perception is vital, especially when distinguishing visually similar objects. We propose an approach to incorporate tactile data into a Vision-Language Model (VLM) for visuo-tactile zero-shot object recognition. Our approach…

Robotics · Computer Science 2024-09-17 Shiori Ueda , Atsushi Hashimoto , Masashi Hamaya , Kazutoshi Tanaka , Hideo Saito

Motion sensor time-series are central to Human Activity Recognition (HAR), yet conventional approaches are constrained to fixed activity sets and typically require costly parameter retraining to adapt to new behaviors. While Large Language…

Computation and Language · Computer Science 2026-04-14 Zechen Li , Baiyu Chen , Hao Xue , Flora D. Salim

Temporal action detection (TAD) involves the localization and classification of action instances within untrimmed videos. While standard TAD follows fully supervised learning with closed-set setting on large training data, recent zero-shot…

Computer Vision and Pattern Recognition · Computer Science 2023-11-08 Thinh Phan , Khoa Vo , Duy Le , Gianfranco Doretto , Donald Adjeroh , Ngan Le

Zero-shot skeleton-based action recognition (ZSAR) aims to recognize action classes without any training skeletons from those classes, relying instead on auxiliary semantics from text. Existing approaches frequently depend on explicit…

Computer Vision and Pattern Recognition · Computer Science 2026-04-03 Soroush Oraki , Feng Ding , Jie Liang

Converting a model's internals to text can yield human-understandable insights about the model. Inspired by the recent success of training-free approaches for image captioning, we propose ZS-A2T, a zero-shot framework that translates the…

Computer Vision and Pattern Recognition · Computer Science 2023-11-10 Leonard Salewski , A. Sophia Koepke , Hendrik P. A. Lensch , Zeynep Akata

While deep learning, including Convolutional Neural Networks (CNNs) and Vision Transformers (ViTs), has significantly advanced classification performance, its typical reliance on extensive annotated datasets presents a major obstacle in…

Computer Vision and Pattern Recognition · Computer Science 2025-09-24 Matheus Vinícius Todescato , Joel Luís Carbonera

Machine Learning (ML) techniques for image classification routinely require many labelled images for training the model and while testing, we ought to use images belonging to the same domain as those used for training. In this paper, we…

Computer Vision and Pattern Recognition · Computer Science 2020-11-19 Preeti Jagdish Sajjan , Frank G. Glavin

Image-based visual-language (I-VL) pre-training has shown great success for learning joint visual-textual representations from large-scale web data, revealing remarkable ability for zero-shot generalisation. This paper presents a simple but…

Computer Vision and Pattern Recognition · Computer Science 2022-07-18 Chen Ju , Tengda Han , Kunhao Zheng , Ya Zhang , Weidi Xie

Vision-Language-Action (VLA) models aim to predict robotic actions based on visual observations and language instructions. Existing approaches require fine-tuning pre-trained visionlanguage models (VLMs) as visual and language features are…

In this paper we propose a novel Temporal Attentive Relation Network (TARN) for the problems of few-shot and zero-shot action recognition. At the heart of our network is a meta-learning approach that learns to compare representations of…

Computer Vision and Pattern Recognition · Computer Science 2019-07-23 Mina Bishay , Georgios Zoumpourlis , Ioannis Patras