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Temporal human action detection aims to identify and localize action segments within untrimmed videos, serving as a pivotal task in video understanding. Despite the progress achieved by prior architectures like CNN and Transformer models,…

Computer Vision and Pattern Recognition · Computer Science 2026-04-13 Yicheng Qiu , Keiji Yanai

Action detection is an essential and challenging task, especially for densely labelled datasets of untrimmed videos. The temporal relation is complex in those datasets, including challenges like composite action, and co-occurring action.…

Computer Vision and Pattern Recognition · Computer Science 2022-03-30 Rui Dai , Srijan Das , Kumara Kahatapitiya , Michael S. Ryoo , Francois Bremond

In this paper, we show that transferring knowledge from other domains of video understanding combined with large-scale learning can improve robustness of Video Object Segmentation (VOS) under complex circumstances. Namely, we focus on…

Computer Vision and Pattern Recognition · Computer Science 2024-05-14 Volodymyr Fedynyak , Yaroslav Romanus , Oles Dobosevych , Igor Babin , Roman Riazantsev

Due to the high similarity between camouflaged instances and the background, the recently proposed camouflaged instance segmentation (CIS) faces challenges in accurate localization and instance segmentation. To this end, inspired by…

Computer Vision and Pattern Recognition · Computer Science 2023-08-30 Bo Dong , Jialun Pei , Rongrong Gao , Tian-Zhu Xiang , Shuo Wang , Huan Xiong

Video Instance Segmentation is a fundamental computer vision task that deals with segmenting and tracking object instances across a video sequence. Most existing methods typically accomplish this task by employing a multi-stage top-down…

Computer Vision and Pattern Recognition · Computer Science 2022-04-25 Jyoti Kini , Mubarak Shah

Video Object Segmentation (VOS) is fundamental to video understanding. Transformer-based methods show significant performance improvement on semi-supervised VOS. However, existing work faces challenges segmenting visually similar objects in…

Computer Vision and Pattern Recognition · Computer Science 2022-08-09 Ye Yu , Jialin Yuan , Gaurav Mittal , Li Fuxin , Mei Chen

We present TubeFormer-DeepLab, the first attempt to tackle multiple core video segmentation tasks in a unified manner. Different video segmentation tasks (e.g., video semantic/instance/panoptic segmentation) are usually considered as…

Computer Vision and Pattern Recognition · Computer Science 2023-03-07 Dahun Kim , Jun Xie , Huiyu Wang , Siyuan Qiao , Qihang Yu , Hong-Seok Kim , Hartwig Adam , In So Kweon , Liang-Chieh Chen

Interactive point cloud segmentation has become a pivotal task for understanding 3D scenes, enabling users to guide segmentation models with simple interactions such as clicks, therefore significantly reducing the effort required to tailor…

Computer Vision and Pattern Recognition · Computer Science 2024-07-22 Chenrui Han , Xuan Yu , Yuxuan Xie , Yili Liu , Sitong Mao , Shunbo Zhou , Rong Xiong , Yue Wang

Online Temporal Action Localization (On-TAL) aims to immediately provide action instances from untrimmed streaming videos. The model is not allowed to utilize future frames and any processing techniques to modify past predictions, making…

Computer Vision and Pattern Recognition · Computer Science 2022-11-10 Tuan N. Tang , Jungin Park , Kwonyoung Kim , Kwanghoon Sohn

Temporal action segmentation in videos has drawn much attention recently. Timestamp supervision is a cost-effective way for this task. To obtain more information to optimize the model, the existing method generated pseudo frame-wise labels…

Computer Vision and Pattern Recognition · Computer Science 2022-12-14 Yang Zhao , Yan Song

Fine-grained action segmentation in long untrimmed videos is an important task for many applications such as surveillance, robotics, and human-computer interaction. To understand subtle and precise actions within a long time period,…

Machine Learning · Computer Science 2020-04-07 Yan Zhang , Krikamol Muandet , Qianli Ma , Heiko Neumann , Siyu Tang

Temporal action segmentation (TAS) aims to classify and locate actions in the long untrimmed action sequence. With the success of deep learning, many deep models for action segmentation have emerged. However, few-shot TAS is still a…

Computer Vision and Pattern Recognition · Computer Science 2022-07-21 Leiyang Xu , Qiang Wang , Xiaotian Lin , Lin Yuan

Semantic segmentation of remotely sensed urban scene images is required in a wide range of practical applications, such as land cover mapping, urban change detection, environmental protection, and economic assessment.Driven by rapid…

Computer Vision and Pattern Recognition · Computer Science 2022-06-28 Libo Wang , Rui Li , Ce Zhang , Shenghui Fang , Chenxi Duan , Xiaoliang Meng , Peter M. Atkinson

Current state-of-the-art human action recognition is focused on the classification of temporally trimmed videos in which only one action occurs per frame. In this work we address the problem of action localisation and instance segmentation…

Computer Vision and Pattern Recognition · Computer Science 2017-08-08 Suman Saha , Gurkirt Singh , Michael Sapienza , Philip H. S. Torr , Fabio Cuzzolin

Decoding in a Transformer based language model is inherently sequential as a token's embedding needs to pass through all the layers in the network before the generation of the next token can begin. In this work, we propose a new…

Machine Learning · Computer Science 2025-08-27 Dylan Cutler , Arun Kandoor , Nishanth Dikkala , Nikunj Saunshi , Xin Wang , Rina Panigrahy

Video instance segmentation aims to detect, segment, and track objects in a video. Current approaches extend image-level segmentation algorithms to the temporal domain. However, this results in temporally inconsistent masks. In this work,…

Computer Vision and Pattern Recognition · Computer Science 2021-12-15 Anirudh S Chakravarthy , Won-Dong Jang , Zudi Lin , Donglai Wei , Song Bai , Hanspeter Pfister

Instance segmentation with neural networks is an essential task in environment perception. In many works, it has been observed that neural networks can predict false positive instances with high confidence values and true positives with low…

Computer Vision and Pattern Recognition · Computer Science 2026-01-13 Kira Maag , Matthias Rottmann , Serin Varghese , Fabian Hueger , Peter Schlicht , Hanno Gottschalk

Vision Transformers have substantially advanced the capabilities of segmentation models across both image and video domains. Among them, the Swin Transformer stands out for its ability to capture hierarchical, multi-scale representations,…

Computer Vision and Pattern Recognition · Computer Science 2025-08-11 Ka-Wai Yung , Felix J. S. Bragman , Jialang Xu , Imanol Luengo , Danail Stoyanov , Evangelos B. Mazomenos

Temporal action localization presents a trade-off between test performance and annotation-time cost. Fully supervised methods achieve good performance with time-consuming boundary annotations. Weakly supervised methods with cheaper…

Computer Vision and Pattern Recognition · Computer Science 2020-07-06 Xinpeng Ding , Nannan Wang , Xinbo Gao , Jie Li , Xiaoyu Wang , Tongliang Liu

Efficient video action recognition remains a challenging problem. One large model after another takes the place of the state-of-the-art on the Kinetics dataset, but real-world efficiency evaluations are often lacking. In this work, we fill…

Computer Vision and Pattern Recognition · Computer Science 2021-11-19 Raivo Koot , Haiping Lu