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Video coding has traditionally been developed to support services such as video streaming, videoconferencing, digital TV, and so on. The main intent was to enable human viewing of the encoded content. However, with the advances in deep…

图像与视频处理 · 电气工程与系统科学 2024-11-19 Hadi Hadizadeh , Ivan V. Bajić

This paper introduces a fast and efficient network architecture, NeXtVLAD, to aggregate frame-level features into a compact feature vector for large-scale video classification. Briefly speaking, the basic idea is to decompose a…

计算机视觉与模式识别 · 计算机科学 2018-11-14 Rongcheng Lin , Jing Xiao , Jianping Fan

Video action detection (VAD) aims to detect actors and classify their actions in a video. We figure that VAD suffers more from classification rather than localization of actors. Hence, we analyze how prevailing methods form features for…

计算机视觉与模式识别 · 计算机科学 2024-09-12 Jinsung Lee , Taeoh Kim , Inwoong Lee , Minho Shim , Dongyoon Wee , Minsu Cho , Suha Kwak

Weakly-Supervised Video Anomaly Detection aims to identify anomalous events using only video-level labels, balancing annotation efficiency with practical applicability. However, existing methods often oversimplify the anomaly space by…

计算机视觉与模式识别 · 计算机科学 2025-12-30 Junhee Lee , ChaeBeen Bang , MyoungChul Kim , MyeongAh Cho

Video action detection requires dense spatio-temporal annotations, which are both challenging and expensive to obtain. However, real-world videos often vary in difficulty and may not require the same level of annotation. This paper analyzes…

计算机视觉与模式识别 · 计算机科学 2025-08-20 Aayush Rana , Akash Kumar , Vibhav Vineet , Yogesh S Rawat

We present a novel framework, Action Progression Network (APN), for temporal action detection (TAD) in videos. The framework locates actions in videos by detecting the action evolution process. To encode the action evolution, we quantify a…

计算机视觉与模式识别 · 计算机科学 2023-08-21 Chongkai Lu , Man-Wai Mak , Ruimin Li , Zheru Chi , Hong Fu

Weakly supervised video anomaly detection (WS-VAD) involves identifying the temporal intervals that contain anomalous events in untrimmed videos, where only video-level annotations are provided as supervisory signals. However, a key…

计算机视觉与模式识别 · 计算机科学 2026-03-03 Yu Wang , Shengjie Zhao

We propose a novel deep supervised neural network for the task of action recognition in videos, which implicitly takes advantage of visual tracking and shares the robustness of both deep Convolutional Neural Network (CNN) and Recurrent…

计算机视觉与模式识别 · 计算机科学 2016-07-12 Jialin Wu , Gu Wang , Wukui Yang , Xiangyang Ji

Research in human action recognition has accelerated significantly since the introduction of powerful machine learning tools such as Convolutional Neural Networks (CNNs). However, effective and efficient methods for incorporation of…

计算机视觉与模式识别 · 计算机科学 2018-03-21 Jinliang Zang , Le Wang , Ziyi Liu , Qilin Zhang , Zhenxing Niu , Gang Hua , Nanning Zheng

Vision Transformer (ViT) has shown high potential in video recognition, owing to its flexible design, adaptable self-attention mechanisms, and the efficacy of masked pre-training. Yet, it remains unclear how to adapt these pre-trained…

计算机视觉与模式识别 · 计算机科学 2024-04-16 Min Yang , Huan Gao , Ping Guo , Limin Wang

Spatio-temporal feature learning is of central importance for action recognition in videos. Existing deep neural network models either learn spatial and temporal features independently (C2D) or jointly with unconstrained parameters (C3D).…

计算机视觉与模式识别 · 计算机科学 2019-03-05 Chao Li , Qiaoyong Zhong , Di Xie , Shiliang Pu

In this paper, we propose a new video object detector (VoD) method referred to as temporal feature aggregation and motion-aware VoD (TM-VoD), which produces a joint representation of temporal image sequences and object motion. The proposed…

计算机视觉与模式识别 · 计算机科学 2020-11-23 Junho Koh , Jaekyum Kim , Younji Shin , Byeongwon Lee , Seungji Yang , Jun Won Choi

We present a new architecture for human action forecasting from videos. A temporal recurrent encoder captures temporal information of input videos while a self-attention model is used to attend on relevant feature dimensions of the input…

计算机视觉与模式识别 · 计算机科学 2021-07-20 Yan Bin Ng , Basura Fernando

Temporal action detection (TAD) is a challenging task which aims to temporally localize and recognize the human action in untrimmed videos. Current mainstream one-stage TAD approaches localize and classify action proposals relying on…

计算机视觉与模式识别 · 计算机科学 2021-06-30 Ranyu Ning , Can Zhang , Yuexian Zou

Nuanced understanding and the generation of detailed descriptive content for (bimanual) manipulation actions in videos is important for disciplines such as robotics, human-computer interaction, and video content analysis. This study…

计算机视觉与模式识别 · 计算机科学 2023-10-03 Fatemeh Ziaeetabar , Reza Safabakhsh , Saeedeh Momtazi , Minija Tamosiunaite , Florentin Wörgötter

In this paper, we introduce a global video representation to video-based person re-identification (re-ID) that aggregates local 3D features across the entire video extent. Most of the existing methods rely on 2D convolutional networks…

计算机视觉与模式识别 · 计算机科学 2019-02-07 Lin Wu , Yang Wang , Ling Shao , Meng Wang

Video anomaly detection (VAD) -- commonly formulated as a multiple-instance learning problem in a weakly-supervised manner due to its labor-intensive nature -- is a challenging problem in video surveillance where the frames of anomaly need…

计算机视觉与模式识别 · 计算机科学 2023-07-06 Hyekang Kevin Joo , Khoa Vo , Kashu Yamazaki , Ngan Le

Video anomaly detection (VAD) remains a challenging task in the pattern recognition community due to the ambiguity and diversity of abnormal events. Existing deep learning-based VAD methods usually leverage proxy tasks to learn the normal…

计算机视觉与模式识别 · 计算机科学 2022-11-03 Mengyang Zhao , Yang Liu , Jing Li , Xinhua Zeng

There is significant progress in recognizing traditional human activities from videos focusing on highly distinctive actions involving discriminative body movements, body-object and/or human-human interactions. Driver's activities are…

计算机视觉与模式识别 · 计算机科学 2021-01-19 Zachary Wharton , Ardhendu Behera , Yonghuai Liu , Nik Bessis

We present a new architecture for end-to-end sequence learning of actions in video, we call VideoLSTM. Rather than adapting the video to the peculiarities of established recurrent or convolutional architectures, we adapt the architecture to…

计算机视觉与模式识别 · 计算机科学 2016-07-08 Zhenyang Li , Efstratios Gavves , Mihir Jain , Cees G. M. Snoek