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Video temporal action detection aims to temporally localize and recognize the action in untrimmed videos. Existing one-stage approaches mostly focus on unifying two subtasks, i.e., localization of action proposals and classification of each…

Computer Vision and Pattern Recognition · Computer Science 2019-04-17 Yupan Huang , Qi Dai , Yutong Lu

Computers still have a long way to go before they can interact with users in a truly natural fashion. From a users perspective, the most natural way to interact with a computer would be through a speech and gesture interface. Although…

Computation and Language · Computer Science 2013-04-12 Maher Jebali , Patrice Dalle , Mohamed Jemni

SLVideo is a video moment retrieval system for Sign Language videos that incorporates facial expressions, addressing this gap in existing technology. The system extracts embedding representations for the hand and face signs from video…

Computer Vision and Pattern Recognition · Computer Science 2024-11-07 Gonçalo Vinagre Martins , João Magalhães , Afonso Quinaz , Carla Viegas , Sofia Cavaco

Video anomaly detection under video-level labels is currently a challenging task. Previous works have made progresses on discriminating whether a video sequencecontains anomalies. However, most of them fail to accurately localize the…

Computer Vision and Pattern Recognition · Computer Science 2021-04-15 Hui Lv , Chuanwei Zhou , Chunyan Xu , Zhen Cui , Jian Yang

This paper focuses on temporal localization of actions in untrimmed videos. Existing methods typically train classifiers for a pre-defined list of actions and apply them in a sliding window fashion. However, activities in the wild consist…

Computer Vision and Pattern Recognition · Computer Science 2017-08-07 Jiyang Gao , Chen Sun , Zhenheng Yang , Ram Nevatia

Automated Facial Expression Recognition (FER) has been a challenging task for decades. Many of the existing works use hand-crafted features such as LBP, HOG, LPQ, and Histogram of Optical Flow (HOF) combined with classifiers such as Support…

Computer Vision and Pattern Recognition · Computer Science 2020-04-17 Behzad Hasani , Mohammad H. Mahoor

The goal of spatial-temporal action detection is to determine the time and place where each person's action occurs in a video and classify the corresponding action category. Most of the existing methods adopt fully-supervised learning,…

Computer Vision and Pattern Recognition · Computer Science 2023-09-21 Wei-Jhe Huang , Jheng-Hsien Yeh , Min-Hung Chen , Gueter Josmy Faure , Shang-Hong Lai

Surgical phase recognition from video is a technology that automatically classifies the progress of a surgical procedure and has a wide range of potential applications, including real-time surgical support, optimization of medical…

Computer Vision and Pattern Recognition · Computer Science 2025-05-21 Satoshi Kondo

Signed Language Processing (SLP) concerns the automated processing of signed languages, the main means of communication of Deaf and hearing impaired individuals. SLP features many different tasks, ranging from sign recognition to…

Computation and Language · Computer Science 2024-07-25 Federico Tavella , Viktor Schlegel , Marta Romeo , Aphrodite Galata , Angelo Cangelosi

Rapid development of large language models (LLMs) has significantly advanced multimodal large language models (LMMs), particularly in vision-language tasks. However, existing video-language models often overlook precise temporal…

Computer Vision and Pattern Recognition · Computer Science 2024-11-28 Shimin Chen , Xiaohan Lan , Yitian Yuan , Zequn Jie , Lin Ma

Skeleton-based action recognition has recently received considerable attention. Current approaches to skeleton-based action recognition are typically formulated as one-hot classification tasks and do not fully exploit the semantic relations…

Computer Vision and Pattern Recognition · Computer Science 2023-09-07 Wangmeng Xiang , Chao Li , Yuxuan Zhou , Biao Wang , Lei Zhang

We present Temporal Aggregation Network (TAN) which decomposes 3D convolutions into spatial and temporal aggregation blocks. By stacking spatial and temporal convolutions repeatedly, TAN forms a deep hierarchical representation for…

Computer Vision and Pattern Recognition · Computer Science 2018-12-18 Xiyang Dai , Bharat Singh , Joe Yue-Hei Ng , Larry S. Davis

Sign language is a fundamental means of communication for the deaf and hard-of-hearing (DHH) community, enabling nuanced expression through gestures, facial expressions, and body movements. Despite its critical role in facilitating…

Computer Vision and Pattern Recognition · Computer Science 2025-04-14 Alexander Brettmann , Jakob Grävinghoff , Marlene Rüschoff , Marie Westhues

We propose a lightweight real-time sign language detection model, as we identify the need for such a case in videoconferencing. We extract optical flow features based on human pose estimation and, using a linear classifier, show these…

Computer Vision and Pattern Recognition · Computer Science 2020-09-15 Amit Moryossef , Ioannis Tsochantaridis , Roee Aharoni , Sarah Ebling , Srini Narayanan

Facial action units (AUs) are essential to decode human facial expressions. Researchers have focused on training AU detectors with a variety of features and classifiers. However, several issues remain. These are spatial representation,…

Computer Vision and Pattern Recognition · Computer Science 2016-08-03 Wen-Sheng Chu , Fernando De la Torre , Jeffrey F. Cohn

This paper proposes a novel latent semantic learning method for extracting high-level features (i.e. latent semantics) from a large vocabulary of abundant mid-level features (i.e. visual keywords) with structured sparse representation,…

Multimedia · Computer Science 2015-03-19 Zhiwu Lu , Yuxin Peng

Continuous action recognition is more challenging than isolated recognition because classification and segmentation must be simultaneously carried out. We build on the well known dynamic time warping (DTW) framework and devise a novel…

Computer Vision and Pattern Recognition · Computer Science 2015-03-30 Kaustubh Kulkarni , Georgios Evangelidis , Jan Cech , Radu Horaud

In this paper, we propose Spatio-TEmporal Progressive (STEP) action detector---a progressive learning framework for spatio-temporal action detection in videos. Starting from a handful of coarse-scale proposal cuboids, our approach…

Computer Vision and Pattern Recognition · Computer Science 2019-04-22 Xitong Yang , Xiaodong Yang , Ming-Yu Liu , Fanyi Xiao , Larry Davis , Jan Kautz

Sign language (SL) is the primary method of communication for the 70 million Deaf people around the world. Video dictionaries of isolated signs are a core SL learning tool. Replacing these with 3D avatars can aid learning and enable AR/VR…

Computer Vision and Pattern Recognition · Computer Science 2023-04-21 Maria-Paola Forte , Peter Kulits , Chun-Hao Huang , Vasileios Choutas , Dimitrios Tzionas , Katherine J. Kuchenbecker , Michael J. Black

The primary concern of this research is to take American Sign Language (ASL) data through real time camera footage and be able to convert the data and information into text. Adding to that, we are also putting focus on creating a framework…

Computer Vision and Pattern Recognition · Computer Science 2024-11-22 Hasnat Jamil Bhuiyan , Mubtasim Fuad Mozumder , Md. Rabiul Islam Khan , Md. Sabbir Ahmed , Nabuat Zaman Nahim