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This paper studies the problem of temporal moment localization in a long untrimmed video using natural language as the query. Given an untrimmed video and a sentence as the query, the goal is to determine the starting, and the ending, of…

Computer Vision and Pattern Recognition · Computer Science 2020-03-13 Cristian Rodriguez-Opazo , Edison Marrese-Taylor , Fatemeh Sadat Saleh , Hongdong Li , Stephen Gould

Zero-shot learning is a new paradigm to classify objects from classes that are not available at training time. Zero-shot learning (ZSL) methods have attracted considerable attention in recent years because of their ability to classify…

Computer Vision and Pattern Recognition · Computer Science 2021-06-08 Chandan Gautam , Sethupathy Parameswaran , Ashish Mishra , Suresh Sundaram

Vision language models (VLMs) like CLIP show stellar zero-shot capability on classification benchmarks. However, selecting the VLM with the highest performance on the unlabeled downstream task is non-trivial. Existing VLM selection methods…

Computer Vision and Pattern Recognition · Computer Science 2024-12-31 Yuhe Ding , Bo Jiang , Aihua Zheng , Qin Xu , Jian Liang

Detecting activities in untrimmed videos is an important but challenging task. The performance of existing methods remains unsatisfactory, e.g., they often meet difficulties in locating the beginning and end of a long complex action. In…

Computer Vision and Pattern Recognition · Computer Science 2017-03-09 Yuanjun Xiong , Yue Zhao , Limin Wang , Dahua Lin , Xiaoou Tang

Medical image segmentation has achieved remarkable success through the continuous advancement of UNet-based and Transformer-based foundation backbones. However, clinical diagnosis in the real world often requires integrating domain…

Computer Vision and Pattern Recognition · Computer Science 2025-04-11 Siyuan Dai , Kai Ye , Guodong Liu , Haoteng Tang , Liang Zhan

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

Weakly supervised temporal action localization is a challenging task as only the video-level annotation is available during the training process. To address this problem, we propose a two-stage approach to fully exploit multi-resolution…

Computer Vision and Pattern Recognition · Computer Science 2025-06-24 Rui Su , Dong Xu , Luping Zhou , Wanli Ouyang

In this work, we focus on label efficient learning for video action detection. We develop a novel semi-supervised active learning approach which utilizes both labeled as well as unlabeled data along with informative sample selection for…

Computer Vision and Pattern Recognition · Computer Science 2024-04-04 Ayush Singh , Aayush J Rana , Akash Kumar , Shruti Vyas , Yogesh Singh Rawat

Weakly supervised temporal action localization aims at learning the instance-level action pattern from the video-level labels, where a significant challenge is action-context confusion. To overcome this challenge, one recent work builds an…

Computer Vision and Pattern Recognition · Computer Science 2021-11-25 Le Yang , Junwei Han , Tao Zhao , Tianwei Lin , Dingwen Zhang , Jianxin Chen

Few-shot learning aims to recognize instances from novel classes with few labeled samples, which has great value in research and application. Although there has been a lot of work in this area recently, most of the existing work is based on…

Computer Vision and Pattern Recognition · Computer Science 2020-10-14 Congqi Cao , Yajuan Li , Qinyi Lv , Peng Wang , Yanning Zhang

Detecting actions in untrimmed videos is an important yet challenging task. In this paper, we present the structured segment network (SSN), a novel framework which models the temporal structure of each action instance via a structured…

Computer Vision and Pattern Recognition · Computer Science 2017-09-19 Yue Zhao , Yuanjun Xiong , Limin Wang , Zhirong Wu , Xiaoou Tang , Dahua Lin

In this paper, we investigate large-scale zero-shot activity recognition by modeling the visual and linguistic attributes of action verbs. For example, the verb "salute" has several properties, such as being a light movement, a social act,…

Computation and Language · Computer Science 2017-09-05 Rowan Zellers , Yejin Choi

Semi-supervised video action recognition tends to enable deep neural networks to achieve remarkable performance even with very limited labeled data. However, existing methods are mainly transferred from current image-based methods (e.g.,…

Computer Vision and Pattern Recognition · Computer Science 2022-04-26 Junfei Xiao , Longlong Jing , Lin Zhang , Ju He , Qi She , Zongwei Zhou , Alan Yuille , Yingwei Li

Traditional text classification approaches often require a good amount of labeled data, which is difficult to obtain, especially in restricted domains or less widespread languages. This lack of labeled data has led to the rise of…

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…

Computer Vision and Pattern Recognition · Computer Science 2022-09-29 Celina Hanouti , Hervé Le Borgne

Temporal Sentence Grounding in Videos (TSGV) aims to detect the event timestamps described by the natural language query from untrimmed videos. This paper discusses the challenge of achieving efficient computation in TSGV models while…

Computer Vision and Pattern Recognition · Computer Science 2024-07-25 Renjie Liang , Yiming Yang , Hui Lu , Li Li

Contextual cues related to a person's pose and interactions with objects and other people in the scene can provide valuable information for gaze following. While existing methods have focused on dedicated cue extraction methods, in this…

Computer Vision and Pattern Recognition · Computer Science 2024-06-07 Anshul Gupta , Pierre Vuillecard , Arya Farkhondeh , Jean-Marc Odobez

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…

Computer Vision and Pattern Recognition · Computer Science 2023-05-30 Huan Ren , Wenfei Yang , Tianzhu Zhang , Yongdong Zhang

Temporal action localization aims at localizing action instances from untrimmed videos. Existing works have designed various effective modules to precisely localize action instances based on appearance and motion features. However, by…

Computer Vision and Pattern Recognition · Computer Science 2022-05-30 Le Yang , Junwei Han , Tao Zhao , Nian Liu , Dingwen Zhang

Video Temporal Grounding (VTG) strives to accurately pinpoint event timestamps in a specific video using linguistic queries, significantly impacting downstream tasks like video browsing and editing. Unlike traditional task-specific models,…

Computer Vision and Pattern Recognition · Computer Science 2025-02-04 Yongxin Guo , Jingyu Liu , Mingda Li , Dingxin Cheng , Xiaoying Tang , Dianbo Sui , Qingbin Liu , Xi Chen , Kevin Zhao