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This review provides an in-depth exploration of the field of animal action recognition, focusing on coarse-grained (CG) and fine-grained (FG) techniques. The primary aim is to examine the current state of research in animal behaviour…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Ali Zia , Renuka Sharma , Abdelwahed Khamis , Xuesong Li , Muhammad Husnain , Numan Shafi , Saeed Anwar , Sabine Schmoelzl , Eric Stone , Lars Petersson , Vivien Rolland

Evaluating human actions with clear and detailed feedback is important in areas such as sports, healthcare, and robotics, where decisions rely not only on final outcomes but also on interpretable reasoning. However, most existing methods…

Computer Vision and Pattern Recognition · Computer Science 2025-08-26 Junhao Wu , Xiuer Gu , Zhiying Li , Yeying Jin , Yunfeng Diao , Zhiyu Li , Zhenbo Song , Xiaomei Zhang , Zhaoxin Fan

Action Quality Assessment (AQA) aims to automatically evaluate how well human actions are performed and has been widely applied in sports analysis, skill assessment, and healthcare. However, AQA studies are often developed under…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Kanglei Zhou , Ruizhi Cai , Liyuan Wang , Hubert P. H. Shum , Xiaohui Liang

Video Large Language Models (Video-LLMs) have demonstrated remarkable capabilities in coarse-grained video understanding, however, they struggle with fine-grained temporal grounding. In this paper, we introduce Grounded-VideoLLM, a novel…

Computer Vision and Pattern Recognition · Computer Science 2025-08-22 Haibo Wang , Zhiyang Xu , Yu Cheng , Shizhe Diao , Yufan Zhou , Yixin Cao , Qifan Wang , Weifeng Ge , Lifu Huang

Action recognition and anticipation are key to the success of many computer vision applications. Existing methods can roughly be grouped into those that extract global, context-aware representations of the entire image or sequence, and…

Computer Vision and Pattern Recognition · Computer Science 2016-11-21 Mohammad Sadegh Aliakbarian , Fatemehsadat Saleh , Basura Fernando , Mathieu Salzmann , Lars Petersson , Lars Andersson

Fine-grained action detection is an important task with numerous applications in robotics and human-computer interaction. Existing methods typically utilize a two-stage approach including extraction of local spatio-temporal features…

Computer Vision and Pattern Recognition · Computer Science 2019-11-11 Khoi-Nguyen C. Mac , Dhiraj Joshi , Raymond A. Yeh , Jinjun Xiong , Rogerio S. Feris , Minh N. Do

Millions of cameras at edge are being deployed to power a variety of different deep learning applications. However, the frames captured by these cameras are not always pristine - they can be distorted due to lighting issues, sensor noise,…

Image and Video Processing · Electrical Eng. & Systems 2021-10-27 Sibendu Paul , Utsav Drolia , Y. Charlie Hu , Srimat T. Chakradhar

Action recognition from videos, i.e., classifying a video into one of the pre-defined action types, has been a popular topic in the communities of artificial intelligence, multimedia, and signal processing. However, existing methods usually…

Computer Vision and Pattern Recognition · Computer Science 2022-09-05 Xiaodong Chen , Xinchen Liu , Wu Liu , Kun Liu , Dong Wu , Yongdong Zhang , Tao Mei

Human action recognition (HAR) in videos is one of the core tasks of video understanding. Based on video sequences, the goal is to recognize actions performed by humans. While HAR has received much attention in the visible spectrum, action…

Computer Vision and Pattern Recognition · Computer Science 2022-04-20 Soufiane Lamghari , Guillaume-Alexandre Bilodeau , Nicolas Saunier

Spatiotemporal video grounding aims to localize target entities in videos based on textual queries. While existing research has made significant progress in exocentric videos, the egocentric setting remains relatively underexplored, despite…

Computer Vision and Pattern Recognition · Computer Science 2025-12-10 Shuo Liang , Yiwu Zhong , Zi-Yuan Hu , Yeyao Tao , Liwei Wang

Taking advantage of human pose data for understanding human activities has attracted much attention these days. However, state-of-the-art pose estimators struggle in obtaining high-quality 2D or 3D pose data due to occlusion, truncation and…

Computer Vision and Pattern Recognition · Computer Science 2020-11-12 Di Yang , Rui Dai , Yaohui Wang , Rupayan Mallick , Luca Minciullo , Gianpiero Francesca , Francois Bremond

Can performance on the task of action quality assessment (AQA) be improved by exploiting a description of the action and its quality? Current AQA and skills assessment approaches propose to learn features that serve only one task -…

Computer Vision and Pattern Recognition · Computer Science 2019-06-17 Paritosh Parmar , Brendan Tran Morris

Human performance capture is a highly important computer vision problem with many applications in movie production and virtual/augmented reality. Many previous performance capture approaches either required expensive multi-view setups or…

Computer Vision and Pattern Recognition · Computer Science 2021-11-23 Marc Habermann , Weipeng Xu , Michael Zollhoefer , Gerard Pons-Moll , Christian Theobalt

While image captioning provides isolated descriptions for individual images, and video captioning offers one single narrative for an entire video clip, our work explores an important middle ground: progress-aware video captioning at the…

Computer Vision and Pattern Recognition · Computer Science 2025-03-27 Zihui Xue , Joungbin An , Xitong Yang , Kristen Grauman

Human action recognition and analysis have great demand and important application significance in video surveillance, video retrieval, and human-computer interaction. The task of human action quality evaluation requires the intelligent…

Computer Vision and Pattern Recognition · Computer Science 2022-04-21 Shunli Wang , Dingkang Yang , Peng Zhai , Qing Yu , Tao Suo , Zhan Sun , Ka Li , Lihua Zhang

Part-level Action Parsing aims at part state parsing for boosting action recognition in videos. Despite of dramatic progresses in the area of video classification research, a severe problem faced by the community is that the detailed…

Computer Vision and Pattern Recognition · Computer Science 2021-11-08 Xuanhan Wang , Xiaojia Chen , Lianli Gao , Lechao Chen , Jingkuan Song

In this paper, we introduce Coarse-Fine Networks, a two-stream architecture which benefits from different abstractions of temporal resolution to learn better video representations for long-term motion. Traditional Video models process…

Computer Vision and Pattern Recognition · Computer Science 2021-04-02 Kumara Kahatapitiya , Michael S. Ryoo

Human action recognition in videos is a critical task with significant implications for numerous applications, including surveillance, sports analytics, and healthcare. The challenge lies in creating models that are both precise in their…

Computer Vision and Pattern Recognition · Computer Science 2024-03-12 Yufei Xie

The way humans attend to, process and classify a given image has the potential to vastly benefit the performance of deep learning models. Exploiting where humans are focusing can rectify models when they are deviating from essential…

Computer Vision and Pattern Recognition · Computer Science 2021-11-03 Yao Rong , Wenjia Xu , Zeynep Akata , Enkelejda Kasneci

The ability to quantify how well an action is carried out, also known as action quality assessment (AQA), has attracted recent interest in the vision community. Unfortunately, prior methods often ignore the score rubric used by human…

Computer Vision and Pattern Recognition · Computer Science 2024-08-08 Abrar Majeedi , Viswanatha Reddy Gajjala , Satya Sai Srinath Namburi GNVV , Yin Li