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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

The task of weakly supervised temporal action localization targets at generating temporal boundaries for actions of interest, meanwhile the action category should also be classified. Pseudo-label-based methods, which serve as an effective…

Computer Vision and Pattern Recognition · Computer Science 2023-04-18 Jingqiu Zhou , Linjiang Huang , Liang Wang , Si Liu , Hongsheng Li

Many time series classification tasks, where labels vary over time, are affected by label noise that also varies over time. Such noise can cause label quality to improve, worsen, or periodically change over time. We first propose and…

Machine Learning · Computer Science 2025-03-18 Sujay Nagaraj , Walter Gerych , Sana Tonekaboni , Anna Goldenberg , Berk Ustun , Thomas Hartvigsen

I present the Lower Biased Teacher model, an enhancement of the Unbiased Teacher model, specifically tailored for semi-supervised object detection tasks. The primary innovation of this model is the integration of a localization loss into…

Computer Vision and Pattern Recognition · Computer Science 2024-10-07 Shuang Wang

Labeled data is a critical resource for training and evaluating machine learning models. However, many real-life datasets are only partially labeled. We propose a semi-supervised machine learning training strategy to improve event detection…

Computer Vision and Pattern Recognition · Computer Science 2022-10-05 Florian Dubost , Erin Hong , Nandita Bhaskhar , Siyi Tang , Daniel Rubin , Christopher Lee-Messer

Temporal action segmentation in untrimmed videos has gained increased attention recently. However, annotating action classes and frame-wise boundaries is extremely time consuming and cost intensive, especially on large-scale datasets. To…

Computer Vision and Pattern Recognition · Computer Science 2023-03-10 Wei Lin , Anna Kukleva , Horst Possegger , Hilde Kuehne , Horst Bischof

Semantic segmentation is an important technique for environment perception in intelligent transportation systems. With the rapid development of convolutional neural networks (CNNs), road scene analysis can usually achieve satisfactory…

Computer Vision and Pattern Recognition · Computer Science 2023-03-15 Licong Guan , Xue Yuan

Contemporary Video Instance Segmentation (VIS) methods typically adhere to a pre-train then fine-tune regime, where a segmentation model trained on images is fine-tuned on videos. However, the lack of temporal knowledge in the pre-trained…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Qing Zhong , Peng-Tao Jiang , Wen Wang , Guodong Ding , Lin Wu , Kaiqi Huang

The emerging field of action prediction plays a vital role in various computer vision applications such as autonomous driving, activity analysis and human-computer interaction. Despite significant advancements, accurately predicting future…

Computer Vision and Pattern Recognition · Computer Science 2023-08-22 Izzeddin Teeti , Rongali Sai Bhargav , Vivek Singh , Andrew Bradley , Biplab Banerjee , Fabio Cuzzolin

The goal of this paper is to determine the spatio-temporal location of actions in video. Where training from hard to obtain box annotations is the norm, we propose an intuitive and effective algorithm that localizes actions from their class…

Computer Vision and Pattern Recognition · Computer Science 2017-12-14 Pascal Mettes , Cees G. M. Snoek , Shih-Fu Chang

Accurate brain tumor segmentation from MRI is limited by expensive annotations and data heterogeneity across scanners and sites. We propose a semi-supervised teacher-student framework that combines an uncertainty-aware pseudo-labeling…

Computer Vision and Pattern Recognition · Computer Science 2026-02-10 Jiaming Liu , Cheng Ding , Daoqiang Zhang

The growing demands of stroke rehabilitation have increased the need for solutions to support autonomous exercising. Virtual coaches can provide real-time exercise feedback from video data, helping patients improve motor function and keep…

Image and Video Processing · Electrical Eng. & Systems 2025-06-05 Gonçalo Mesquita , Ana Rita Cóias , Artur Dubrawski , Alexandre Bernardino

The crux of semi-supervised temporal action localization (SS-TAL) lies in excavating valuable information from abundant unlabeled videos. However, current approaches predominantly focus on building models that are robust to the error-prone…

Computer Vision and Pattern Recognition · Computer Science 2024-03-19 Kun Xia , Le Wang , Sanping Zhou , Gang Hua , Wei Tang

Weakly-supervised audio-visual video parsing (AVVP) seeks to detect audible, visible, and audio-visual events without temporal annotations. Previous work has emphasized refining global predictions through contrastive or collaborative…

Computer Vision and Pattern Recognition · Computer Science 2025-09-18 Yaru Chen , Ruohao Guo , Liting Gao , Yang Xiang , Qingyu Luo , Zhenbo Li , Wenwu Wang

Temporal action localization is an important step towards video understanding. Most current action localization methods depend on untrimmed videos with full temporal annotations of action instances. However, it is expensive and…

Computer Vision and Pattern Recognition · Computer Science 2020-01-23 Ashraful Islam , Richard J. Radke

Semantic segmentation requires large amounts of pixel-wise annotations to learn accurate models. In this paper, we present a video prediction-based methodology to scale up training sets by synthesizing new training samples in order to…

Computer Vision and Pattern Recognition · Computer Science 2019-07-04 Yi Zhu , Karan Sapra , Fitsum A. Reda , Kevin J. Shih , Shawn Newsam , Andrew Tao , Bryan Catanzaro

This paper proposes a segregated temporal assembly recurrent (STAR) network for weakly-supervised multiple action detection. The model learns from untrimmed videos with only supervision of video-level labels and makes prediction of…

Computer Vision and Pattern Recognition · Computer Science 2018-11-20 Yunlu Xu , Chengwei Zhang , Zhanzhan Cheng , Jianwen Xie , Yi Niu , Shiliang Pu , Fei Wu

The perception of motion behavior in a dynamic environment holds significant importance for autonomous driving systems, wherein class-agnostic motion prediction methods directly predict the motion of the entire point cloud. While most…

Computer Vision and Pattern Recognition · Computer Science 2024-03-22 Kewei Wang , Yizheng Wu , Jun Cen , Zhiyu Pan , Xingyi Li , Zhe Wang , Zhiguo Cao , Guosheng Lin

Despite the recent progress of fully-supervised action segmentation techniques, the performance is still not fully satisfactory. One main challenge is the problem of spatiotemporal variations (e.g. different people may perform the same…

Computer Vision and Pattern Recognition · Computer Science 2020-03-20 Min-Hung Chen , Baopu Li , Yingze Bao , Ghassan AlRegib , Zsolt Kira

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
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